By state
Historic places in Pennsylvania
3,448 Pennsylvania listings on the National Register of Historic Places, each mapped and dated.
1975
"S" Bridge — Washington, Washington County, Pennsylvania
→1996109--115 Wood Street — Pittsburgh, Allegheny County, Pennsylvania
→19831616 Building — Philadelphia, Philadelphia County, Pennsylvania
→19711724 Chester Courthouse — Chester, Delaware County, Pennsylvania
→19821900 Rittenhouse Square Apartments — Philadelphia, Philadelphia County, Pennsylvania
→198426th District Police and Patrol Station — Philadelphia, Philadelphia County, Pennsylvania
→199132nd St. and Lancaster Ave. Philadelphia Armory — Philadelphia, Philadelphia County, Pennsylvania
→1980Aaronsburg Historic District — Aaronsburg, Centre County, Pennsylvania
→1978Abbeville — Lancaster, Lancaster County, Pennsylvania
→1980Abbott, John, House — Abbottstown, Adams County, Pennsylvania
→1985Abington Township High School — Abington, Montgomery County, Pennsylvania
→1979Academia Pomeroy Covered Bridge — Spruce Hill, Juniata County, Pennsylvania
→2006Academy Hall — Edinboro, Erie County, Pennsylvania
→1999Academy Hill Historic District — Greensburg, Westmoreland County, Pennsylvania
→1990Academy Hill Historic District — Stroudsburg, Monroe County, Pennsylvania
→1966Academy of Music ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1976Acheson, Edward G., House ★ NHL — Monongahela, Washington County, Pennsylvania
→1987Ad-Lin Building — Scranton, Lackawanna County, Pennsylvania
→1980Adairs Covered Bridge — Kistler, Perry County, Pennsylvania
→1988Adams Avenue Bridge in Philadelphia — Philadelphia, Philadelphia County, Pennsylvania
→1974Adams County Courthouse — Gettysburg, Adams County, Pennsylvania
→2015Adams, C.F., Building — Erie, Erie County, Pennsylvania
→1988Adamson, William, School — Philadelphia, Philadelphia County, Pennsylvania
→1978Adelphi School — Philadelphia, Philadelphia County, Pennsylvania
→1977Administration Building, Washington and Jefferson College — Canonsburg, Washington County, Pennsylvania
→1979Ag Hill Complex — State College, Centre County, Pennsylvania
→2014Ajax Metal Company Plant — Philadelphia, Philadelphia County, Pennsylvania
→1998Albertson, Henry, Subdivision Historic District — Lansdowne, Delaware County, Pennsylvania
→2016Albion Carpet Mill — Philadelphia, Philadelphia County, Pennsylvania
→1978Albright Memorial Building — Scranton, Lackawanna County, Pennsylvania
→1988Alcorn, James, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Alden Park Manor — Philadelphia, Philadelphia County, Pennsylvania
→2011Alden Villa — Cornwall Borough, Lebanon County, Pennsylvania
→2009Alfred Newton Richards Medical Research Laboratories and David Goddard Laboratories Buildings ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1979Aline Covered Bridge — Meiserville, Snyder County, Pennsylvania
→2009Alleghany Mennonite Meetinghouse — Brecknock Township, Berks County, Pennsylvania
→1984Allegheny Aqueduct — Gibraltar, Berks County, Pennsylvania
→1978Allegheny Baptist Church — Pleasantville, Venango County, Pennsylvania
→1980Allegheny Cemetery — Pittsburgh, Allegheny County, Pennsylvania
→2013Allegheny Commons — Pittsburgh, Allegheny County, Pennsylvania
→1973Allegheny County Courthouse and Jail ★ NHL — Pittsburgh, Allegheny County, Pennsylvania
→1991Allegheny Furnace — Altoona, Blair County, Pennsylvania
→1986Allegheny High School — Pittsburgh, Allegheny County, Pennsylvania
→1979Allegheny Observatory — Pittsburgh, Allegheny County, Pennsylvania
→1966Allegheny Portage Railroad National Historic Site ★ NHL — Johnstown, Blair County, Pennsylvania
→1971Allegheny Post Office — Pittsburgh, Allegheny County, Pennsylvania
→2000Allegheny River Lock and Dam No. 2 — Pittsburgh, Allegheny County, Pennsylvania
→2000Allegheny River Lock and Dam No. 3 — New Kensington, Allegheny County, Pennsylvania
→2000Allegheny River Lock and Dam No. 4 — Natrona, Allegheny County, Pennsylvania
→2000Allegheny River Lock and Dam No. 6 — Freeport, Armstrong County, Pennsylvania
→2000Allegheny River Lock and Dam No. 7 — Kittanning, Armstrong County, Pennsylvania
→2000Allegheny River Lock and Dam No. 9 — Widnoon, Armstrong County, Pennsylvania
→2000Allegheny River Lock and Dam No.8 — Templeton, Armstrong County, Pennsylvania
→2000Allegheny River Locka and Dam No. 5 — Freeport, Armstrong County, Pennsylvania
→1978Allegheny West Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1988Allen, Ethan, School — Philadelphia, Philadelphia County, Pennsylvania
→2004Allentown Masonic Temple — Allentown, Lehigh County, Pennsylvania
→2005Allentown National Bank — Allentown, Lehigh County, Pennsylvania
→1988Allenwood River Bridge — Allenwood, Northumberland County, Pennsylvania
→1986Allerdice, Taylor, High School — Pittsburgh, Allegheny County, Pennsylvania
→2011Allerman, Conrad and Margaret, House — Ebenezer, Dauphin County, Pennsylvania
→1979Allgates — Haverford, Delaware County, Pennsylvania
→1991Alliance Furnace — Perryopolis, Fayette County, Pennsylvania
→1977Allison, William, House — Spring Mills, Centre County, Pennsylvania
→1985Alpha Terrace Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1991Altoona Armory — Altoona, Blair County, Pennsylvania
→2013Aluminum Research Laboratories — New Kensington, Westmoreland County, Pennsylvania
→2008Amalgamated Center — Philadelphia, Philadelphia County, Pennsylvania
→1980American Baptist Publication Society — Philadelphia, Philadelphia County, Pennsylvania
→1966American Philosophical Society Hall ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2006American Railway Express Company Garage — Philadelphia, Philadelphia County, Pennsylvania
→1990American/Consolidated Tobacco Companies — Lancaster, Lancaster County, Pennsylvania
→1984Americus Hotel — Allentown, Lehigh County, Pennsylvania
→1966Andalusia ★ NHL — Philadelphia, Bucks County, Pennsylvania
→2011Anderson, Marian, House — Philadelphia, Philadelphia County, Pennsylvania
→2014Andrew Wyeth Studio and Kuerner Farm (Boundary Expansion and Additional Documentation) ★ NHL — Chadds Fod Rd., Delaware County, Pennsylvania
→1988Andrews Bridge Historic District — Colerain Twnshp, Lancaster County, Pennsylvania
→1990Andrews, H. O., Feed Mill — Union, Huntingdon County, Pennsylvania
→1979Angle Farm — Mercersburg, Franklin County, Pennsylvania
→1982Anglecot, The — Philadelphia, Philadelphia County, Pennsylvania
→1979Annville Historic District — Annville, Lebanon County, Pennsylvania
→1986Anoatok — Kane, McKean County, Pennsylvania
→1975Antes, Henry, House ★ NHL — Pottstown, Montgomery County, Pennsylvania
→1978Anthracite Bank Building — Tamaqua, Schuylkill County, Pennsylvania
→1971Arch Street Friends Meeting House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1978Arch Street Opera House — Philadelphia, Philadelphia County, Pennsylvania
→1971Arch Street Presbyterian Church — Philadelphia, Philadelphia County, Pennsylvania
→2005Armstrong Cork Company — Pittsburgh, Allegheny County, Pennsylvania
→1981Armstrong County Courthouse and Jail — Kittanning, Armstrong County, Pennsylvania
→1986Armstrong Tunnel — Pittsburgh, Allegheny County, Pennsylvania
→2005Arndt, Jacob, House and Barn — Williams Township, Northampton County, Pennsylvania
→1986Arsenal Junior High School — Pittsburgh, Allegheny County, Pennsylvania
→1984Ashbridge, David, Log House — West Chester, Chester County, Pennsylvania
→1991Ashley and Bailey Company Silk Mill — West York Borough, York County, Pennsylvania
→1980Ashley and Bailey Silk Mill — Marietta, Lancaster County, Pennsylvania
→1980Ashley Planes — Ashley and vicinity, Luzerne County, Pennsylvania
→2003Ashton--Hursh House — New Cumberland, York County, Pennsylvania
→1973Askew Bridge — Reading, Berks County, Pennsylvania
→1972Athenaeum of Philadelphia ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2004Athens Historic District — Athens, Bradford County, Pennsylvania
→2002Atkinson Road Bridge — Solebury Twp, Bucks County, Pennsylvania
→2011Atkinson, Clement, Memorial Hospital — Coatesville City, Chester County, Pennsylvania
→1988Audenried, Charles Y., Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1996August, Wendell, Forge — Grove City, Mercer County, Pennsylvania
→1967Augustus Lutheran Church ★ NHL — Trappe, Montgomery County, Pennsylvania
→1987Austin Dam — Austin, Potter County, Pennsylvania
→1984Autun — West Whiteland, Chester County, Pennsylvania
→2001Awbury Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1988Axe, William W., School — Philadelphia, Philadelphia County, Pennsylvania
→1980Ayres, Bucher, Farm — Pine Grove Mills, Centre County, Pennsylvania
→1979Ayres, John, House — Dauphin, Dauphin County, Pennsylvania
→1985B.F. Good & Company Leaf Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1985B'Nai Jacob Synagogue — Middletown, Dauphin County, Pennsylvania
→1986Bache, Alexander Dallas, School — Philadelphia, Philadelphia County, Pennsylvania
→1979Bachman and Forry Tobacco Warehouse — Columbia, Lancaster County, Pennsylvania
→1990Bahr Mill Complex — Gabelsville, Berks County, Pennsylvania
→1979Bailey Covered Bridge — Prosperity, Washington County, Pennsylvania
→1985Bailey, John, Farm — Coatesville, Chester County, Pennsylvania
→1985Baily Farm — W. Bradford Twp., Chester County, Pennsylvania
→1982Bair, Oliver, H., Funeral Home — Philadelphia, Philadelphia County, Pennsylvania
→1983Baird, Matthew, Mansion — Philadelphia, Philadelphia County, Pennsylvania
→1990Baker Bridge — Newburg, Huntingdon County, Pennsylvania
→1975Baker Mansion — Altoona, Blair County, Pennsylvania
→1974Baldwin-Reynolds House — Meadville, Crawford County, Pennsylvania
→1987Bangor Episcopal Church — Blue Ball, Lancaster County, Pennsylvania
→1972Bank of Chester County — West Chester, Chester County, Pennsylvania
→1980Banks Covered Bridge — New Wilmington, Lawrence County, Pennsylvania
→1983Baptist Institute for Christian Workers — Philadelphia, Philadelphia County, Pennsylvania
→1978Barclay House — Bedford, Bedford County, Pennsylvania
→2002Barclay House — West Chester, Chester County, Pennsylvania
→1980Barley Sheaf Inn — Norristown, Montgomery County, Pennsylvania
→1982Barnard, William J., Residence — Thornbury, Chester County, Pennsylvania
→1979BARNEGAT (lightship) — Philadelphia, Philadelphia County, Pennsylvania
→1971Barns-Brinton House — Hamorton, Chester County, Pennsylvania
→1990Barree Forge and Furnace — Alexandria, Huntingdon County, Pennsylvania
→1982Barrett, Rufus, Stone House — Bradford, McKean County, Pennsylvania
→1980Barronvale Bridge — Somerset, Somerset County, Pennsylvania
→1986Bartlett School — Philadelphia, Philadelphia County, Pennsylvania
→1988Barto Bridge — Barto, Berks County, Pennsylvania
→1988Barton, Clara, School — Philadelphia, Philadelphia County, Pennsylvania
→1986Bartram, John, High School — Philadelphia, Philadelphia County, Pennsylvania
→1966Bartram, John, House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1980Bartram's Covered Bridge — Media, Chester County, Pennsylvania
→1990Basch & Fisher Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1982Bauern Freund Print Shop — Marlborough, Montgomery County, Pennsylvania
→1980Baumgardner's Mill Covered Bridge — Willow Street, Lancaster County, Pennsylvania
→1994Bausman Farmstead — Lancaster, Lancaster County, Pennsylvania
→1986Baxter High School — Pittsburgh, Allegheny County, Pennsylvania
→1986Bayard School — Pittsburgh, Allegheny County, Pennsylvania
→1996Beallsville Historic District — Ellsworth, Washington County, Pennsylvania
→1999Bear Creek Village Historic District — Bear Creek Village, Luzerne County, Pennsylvania
→2004Beatty's Mills Factory Building — Philadelphia, Philadelphia County, Pennsylvania
→1996Beaver Historic District — Beaver, Beaver County, Pennsylvania
→1987Beaver, Thomas, Free Library and Danville YMCA — Danville, Montour County, Pennsylvania
→1982Bechdel II, Christian, House — Blanchard, Centre County, Pennsylvania
→1976Beck House — Sunbury, Northumberland County, Pennsylvania
→1988Bedford County Alms House — Bedford, Bedford County, Pennsylvania
→1983Bedford Historic District — Bedford, Bedford County, Pennsylvania
→1986Bedford School — Pittsburgh, Allegheny County, Pennsylvania
→1984Bedford Springs Hotel Historic District ★ NHL — Bedford, Bedford County, Pennsylvania
→1988Beeber, Dimner, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1980Beechdale Bridge — Berlin, Somerset County, Pennsylvania
→1986Beechwood Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1971Beggarstown School — Philadelphia, Philadelphia County, Pennsylvania
→1982Belgravia Hotel — Philadelphia, Philadelphia County, Pennsylvania
→2000Bell Telephone Company Building — Philadelphia, Philadelphia County, Pennsylvania
→2011Bell Telephone Company of Pennsylvania Western Headquarters Building — Pittsburgh, Allegheny County, Pennsylvania
→2002Bell Telephone Exchange Building — Philadelphia, Philadelphia County, Pennsylvania
→1982Bell, John C., House — Philadelphia, Philadelphia County, Pennsylvania
→1984Bell, John, Farm — West Whiteland, Chester County, Pennsylvania
→1989Bellefonte Armory — Bellefonte, Centre County, Pennsylvania
→1999Bellefonte Forge House — Spring Township, Centre County, Pennsylvania
→1977Bellefonte Historic District — Bellefonte, Centre County, Pennsylvania
→2010Bellemonte Silk Mill — Hawley, Wayne County, Pennsylvania
→1977Bellevue Stratford Hotel — Philadelphia, Philadelphia County, Pennsylvania
→2021Bellevue Worsted Mills — Philadelphia, Philadelphia County, Pennsylvania
→1973Bellman's Union Church — Centerport, Berks County, Pennsylvania
→1980Bells Mills Covered Bridge — Yukon, Westmoreland County, Pennsylvania
→1988Belmont — Bensalem, Bucks County, Pennsylvania
→1988Belmont Avenue Bridge in Philadelphia — Philadelphia, Philadelphia County, Pennsylvania
→1972Belmont Mansion — Philadelphia, Philadelphia County, Pennsylvania
→1988Belmont School — Philadelphia, Philadelphia County, Pennsylvania
→1986Beltzhoover Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1982Benjamin Franklin Hotel — Philadelphia, Philadelphia County, Pennsylvania
→1977Bently Hall — Meadville, Crawford County, Pennsylvania
→1976Bergdoll Mansion — Philadelphia, Philadelphia County, Pennsylvania
→1985Bergdoll, Louis, House — Philadelphia, Philadelphia County, Pennsylvania
→2014Berger, John & Son, Company Tobacco Warehouse — East Hempfield Township, Lancaster County, Pennsylvania
→1973Bergy Bridge Historic District — Harleysville, Montgomery County, Pennsylvania
→1977Berk, Daniel, Log House — Albany, Berks County, Pennsylvania
→2000Berkheimer, Henry and Elizabeth, Farm — Washington Township, York County, Pennsylvania
→2002Berkley Historic District — Ontelaunee, Berks County, Pennsylvania
→2019Berks County Trust Company — Reading, Berks County, Pennsylvania
→1991Berwick Armory — Berwick, Columbia County, Pennsylvania
→1992Berwind--White Mine 40 Historic District — Scalp Level, Cambria County, Pennsylvania
→2007Beth Sholom Synagogue ★ NHL — Elkins Park (Cheltenham Township), Montgomery County, Pennsylvania
→1979Bethel A.M.E. Church — Reading, Berks County, Pennsylvania
→2002Bethel African American Episcopal Church of Monongahela City — Monongahela City, Washington County, Pennsylvania
→2020Bethel Burial Ground — Philadelphia, Philadelphia County, Pennsylvania
→1991Bethlehem Armory — Bethlehem, Lehigh County, Pennsylvania
→2005Bethlehem Silk Mill — Bethlehem, Northampton County, Pennsylvania
→2004Bethlehem Steel Lehigh Plant Mill #2 Annex — Bethlehem, Northampton County, Pennsylvania
→1975Beulah Presbyterian Church — Churchill, Allegheny County, Pennsylvania
→2007Biberman Building — Philadelphia, Philadelphia County, Pennsylvania
→1984Biery's Port Historic District — Catasauqua, Lehigh County, Pennsylvania
→1978Biever House — Annville, Lebanon County, Pennsylvania
→1975Big Bend Historical Area — Mercer, Mercer County, Pennsylvania
→1970Billmeyer House — York, York County, Pennsylvania
→1971Billmeyer, Daniel, House — Philadelphia, Philadelphia County, Pennsylvania
→1972Billmeyer, Michael, House — Philadelphia, Philadelphia County, Pennsylvania
→1985Bindley Hardware Company Building — Pittsburgh, Allegheny County, Pennsylvania
→1975Bindnagles Evangelical Lutheran Church — Palmyra, Lebanon County, Pennsylvania
→1978Birchrunville General Store — Birchrunville, Chester County, Pennsylvania
→1992Birchrunville Historic District — Birchrunville, Chester County, Pennsylvania
→1992Bird-in-Hand Hotel — Bird-in-Hand, Lancaster County, Pennsylvania
→1990Birmingham Bridge — Birmingham, Huntingdon County, Pennsylvania
→1971Birmingham Friends Meetinghouse and School — Birmingham, Chester County, Pennsylvania
→1986Birmingham Public School — Pittsburgh, Allegheny County, Pennsylvania
→1988Birney, Gen. David B., School — Philadelphia, Philadelphia County, Pennsylvania
→1980Bishop Mackay-Smith House — Philadelphia, Philadelphia County, Pennsylvania
→1985Bishop, John, House — Reading, Berks County, Pennsylvania
→1980Bistline Covered Bridge — Blain, Perry County, Pennsylvania
→1980Bittenbender Covered Bridge — Huntington Mills, Luzerne County, Pennsylvania
→1980Bitzer's Mill Covered Bridge — Ephrata, Lancaster County, Pennsylvania
→2000Bixler, Michael and Magdealena Farmstead — East Manchester, York County, Pennsylvania
→2005Black Horse Inn — Flourtown, Montgomery County, Pennsylvania
→1978Black Horse Tavern — Gettysburg, Adams County, Pennsylvania
→1987Black Moshannon State Park Day Use District — Philipsburg, Centre County, Pennsylvania
→1987Black Moshannon State Park Family Cabin District — Philipsburg, Centre County, Pennsylvania
→1987Black Moshannon State Park Maintenance District — Philipsburg, Centre County, Pennsylvania
→1988Black Rock Bridge — Mont Clare, Chester County, Pennsylvania
→1977Black, William, Homestead — New Cumberland, Cumberland County, Pennsylvania
→1989Blacksmith Shop ★ NHL — Johnstown, Cambria County, Pennsylvania
→2013Blackwell Methodist Episcopal Church — Blackwell, Tioga County, Pennsylvania
→1976Blair County Courthouse — Hollidaysburg, Blair County, Pennsylvania
→1989Blairsville Armory — Blairsville, Indiana County, Pennsylvania
→1988Blankenburg, Reudolph, School — Philadelphia, Philadelphia County, Pennsylvania
→1986Bliss, Phillip Paul, House — Rome, Bradford County, Pennsylvania
→1983Bloomsburg Historic District — Bloomsburg, Columbia County, Pennsylvania
→2023Blumenthal Brothers Chocolate Factory — Philadelphia, Philadelphia County, Pennsylvania
→1977Blythe, Benjamin, Homestead — Shippensburg, Cumberland County, Pennsylvania
→1978Boal Mansion — Boalsburg, Centre County, Pennsylvania
→1977Boalsburg Historic District — Boalsburg, Centre County, Pennsylvania
→1983Board of Education Building — Philadelphia, Philadelphia County, Pennsylvania
→1987Boat House Row ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1975Bobb, Barnett, House — York, York County, Pennsylvania
→2003Boekel Building — Philadelphia, Philadelphia County, Pennsylvania
→1980Bogert Covered Bridge — Allentown, Lehigh County, Pennsylvania
→1987Boggs Avenue Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1984Boiling Springs Historic District — Boiling Springs, Cumberland County, Pennsylvania
→1986Bok, Edward, Vocational School — Philadelphia, Philadelphia County, Pennsylvania
→1978Bollman, W., and Company Bridge — Meyersdale, Somerset County, Pennsylvania
→1975Bomberger's Distillery ★ NHL — Newmanstown, Lebanon County, Pennsylvania
→1978Bonifels — Ridway, Elk County, Pennsylvania
→1979Bonnet's Tavern — Bedford, Bedford County, Pennsylvania
→1980Book's Covered Bridge — Blain, Perry County, Pennsylvania
→1972Boone, Daniel, Homestead Site and Bertolet Cabin — Birdsboro, Berks County, Pennsylvania
→1986Boone, Daniel, School — Philadelphia, Philadelphia County, Pennsylvania
→1982Boonecroft — Douglassville, Berks County, Pennsylvania
→2003Booth Farm — Boothwyn, Delaware County, Pennsylvania
→1990Borneman Mill — Bally, Berks County, Pennsylvania
→1980Borough Hall of the Borough of Waynesboro — Waynesboro, Franklin County, Pennsylvania
→1999Bost Building ★ NHL — Homestead Borough, Allegheny County, Pennsylvania
→1996Boston Store — Erie, Erie County, Pennsylvania
→1994Boswell Historic District — Boswell, Somerset County, Pennsylvania
→1995Boughner, Alexander V., House — Greensboro, Greene County, Pennsylvania
→1979Bowman Homestead — McKeesport, Allegheny County, Pennsylvania
→1990Bowman, Jacob, Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1975Bowman's Castle — Brownsville, Fayette County, Pennsylvania
→1990Bowmansville Roller Mill — Bowmansville, Lancaster County, Pennsylvania
→1982Boyce Station — Upper St. Clair, Allegheny County, Pennsylvania
→1992Boyer--Mertz Farm — Kutztown, Berks County, Pennsylvania
→1983Boyer, Riter, House — West Whiteland, Chester County, Pennsylvania
→2017Boyertown Burial Casket Company — East Greenville, Montgomery County, Pennsylvania
→2018Boys' Club of Pittsburgh — Pittsburgh, Allegheny County, Pennsylvania
→1991Bradford Armory — Bradford, McKean County, Pennsylvania
→1987Bradford County Courthouse — Towanda, Bradford County, Pennsylvania
→2000Bradford Downtown Historic District — Bradford, McKean County, Pennsylvania
→1971Bradford Friends Meetinghouse — Marshallton, Chester County, Pennsylvania
→1976Bradford Old City Hall — Bradford, McKean County, Pennsylvania
→1973Bradford, David, House ★ NHL — Washington, Washington County, Pennsylvania
→1980Bradys Bend Iron Company Furnaces — Bradys Bend, Armstrong County, Pennsylvania
→1966Brandywine Battlefield ★ NHL — Chadds Ford, Delaware County, Pennsylvania
→1985Brandywine Building and Loan Assoc. Rowhouses — Coatesville, Chester County, Pennsylvania
→1995Brandywine Summit Camp Meeting — Chadds Ford, Delaware County, Pennsylvania
→2012Brashear, John A., House and Factory — Pittsburgh, Allegheny County, Pennsylvania
→1979Breezedale — Indiana, Indiana County, Pennsylvania
→1988Bregy, F. Amadee, School — Philadelphia, Philadelphia County, Pennsylvania
→1972Brendle Farms — Schaefferstown, Lebanon County, Pennsylvania
→1982Breslyn Apartments — Philadelphia, Philadelphia County, Pennsylvania
→1991Brewerytown Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2004Breyer, Henry W., Sr., House — Eilkins Park, Cheltenham, Montgomery County, Pennsylvania
→1989Bridesburg School — Philadelphia, Philadelphia County, Pennsylvania
→1995Bridge 182+42, Northern Central Railway — Glen Rock, York County, Pennsylvania
→1995Bridge 5+92, Northern Central Railway — Seven Valleys, York County, Pennsylvania
→1995Bridge 634, Northern Central Railway — Railroad, York County, Pennsylvania
→1988Bridge between East Manchester and Newberry Townships — Conewago Heights, York County, Pennsylvania
→1988Bridge between Guilford and Hamilton Townships — Social Island, Franklin County, Pennsylvania
→1988Bridge between Madison and Mahoning Townships — Deanville, Armstrong County, Pennsylvania
→1988Bridge between Monroe and Penn Townships — Selinsgrove, Snyder County, Pennsylvania
→1988Bridge in Albany Township — Steinsville, Berks County, Pennsylvania
→1988Bridge in Athens Township — Athens, Bradford County, Pennsylvania
→1988Bridge in Bangor Borough — Bangor, Northampton County, Pennsylvania
→1988Bridge in Brown Township — Hillborn, Lycoming County, Pennsylvania
→1988Bridge in Buckingham Township — Wycombe, Bucks County, Pennsylvania
→1988Bridge in Cherrytree Township — Titusville, Venango County, Pennsylvania
→1988Bridge in City of Wilkes-Barre — Wilkes-Barre, Luzerne County, Pennsylvania
→1988Bridge in Clinton Township — Kennerdell, Venango County, Pennsylvania
→1988Bridge in Cumberland Township — Greenmount, Adams County, Pennsylvania
→1988Bridge in Dreher Township — Haags Mill, Wayne County, Pennsylvania
→1988Bridge in East Fallowfield Township — Atlantic, Crawford County, Pennsylvania
→1988Bridge in East Fallowfield Township — Mortonville, Chester County, Pennsylvania
→1988Bridge in Fishing Creek Township — Bendertown, Columbia County, Pennsylvania
→1988Bridge in Franconia Township — Elvoy, Montgomery County, Pennsylvania
→1988Bridge in Franklin Township — Morrisville, Greene County, Pennsylvania
→1988Bridge in French Creek Township — Carlton, Mercer County, Pennsylvania
→1988Bridge in Gibson Borough — South Gibson, Susquehanna County, Pennsylvania
→1988Bridge in Greenwood Township — Bells Landing, Clearfield County, Pennsylvania
→1988Bridge in Hatfield Township — Unionville, Montgomery County, Pennsylvania
→1988Bridge in Heidelberg Township — Germansville, Lehigh County, Pennsylvania
→1988Bridge in Jefferson Borough — Cochrans Mill, Allegheny County, Pennsylvania
→1988Bridge in Jenner Township — Pilltown, Somerset County, Pennsylvania
→1988Bridge in Johnstown City — Johnstown, Cambria County, Pennsylvania
→1988Bridge in Lewis Township — Bodines, Lycoming County, Pennsylvania
→1988Bridge in Lykens Township No. 1 — Edman, Dauphin County, Pennsylvania
→1988Bridge in Lykens Township No. 2 — Fearnot, Dauphin County, Pennsylvania
→1988Bridge in Metal Township — Willow Hill, Franklin County, Pennsylvania
→1988Bridge in Newport Borough — Newport, Perry County, Pennsylvania
→1988Bridge in Nicholson Township — Starkville, Wyoming County, Pennsylvania
→1988Bridge in Oil Creek Township — Titusville, Crawford County, Pennsylvania
→1988Bridge in Portage Township — Oil City, Cambria County, Pennsylvania
→1988Bridge in Porter Township — Jersey Shore, Lycoming County, Pennsylvania
→1988Bridge in Radnor Township No. 1 — Broomall, Delaware County, Pennsylvania
→1988Bridge in Radnor Township No. 2 — Villanova, Delaware County, Pennsylvania
→1988Bridge in Reed Township — Inglenook, Dauphin County, Pennsylvania
→1988Bridge in Rockdale Township — Millers Station, Crawford County, Pennsylvania
→1988Bridge in Shaler Township — Glenshaw, Allegheny County, Pennsylvania
→1988Bridge in Snake Spring Township — Bedford, Bedford County, Pennsylvania
→1988Bridge in Solebury Township — Carversville, Bucks County, Pennsylvania
→1988Bridge in South Beaver Township — Cannelton, Beaver County, Pennsylvania
→1988Bridge in Tinicum Township — Point Pleasant, Bucks County, Pennsylvania
→1988Bridge in Upper Frederick Township — Fagleysville, Montgomery County, Pennsylvania
→1988Bridge in Upper Fredrick Township — Lower Frederick Township, Montgomery County, Pennsylvania
→1988Bridge in Upper Merion Township — Gulph Mills, Montgomery County, Pennsylvania
→1988Bridge in Washington Township — Kralltown, York County, Pennsylvania
→1988Bridge in West Earl Township — Brownstown, Lancaster County, Pennsylvania
→1988Bridge in West Fallowfield Township — Steelville, Chester County, Pennsylvania
→1988Bridge in West Mead Township — Center Road Corners, Crawford County, Pennsylvania
→1988Bridge in West Wheatfield Township — Robinson, Indiana County, Pennsylvania
→1988Bridge in Westover Borough — Westover, Clearfield County, Pennsylvania
→1988Bridge in Williams Township — Stouts, Northampton County, Pennsylvania
→1988Bridge in Yardley Borough — Scammells Corner, Bucks County, Pennsylvania
→1983Bridge Mill Farm — Downingtown, Chester County, Pennsylvania
→1984Bridge Valley Bridge — Hartsville, Bucks County, Pennsylvania
→1996Bridgewater Historic District — Bridgewater, Beaver County, Pennsylvania
→1973Brier Hill — Brier Hill, Fayette County, Pennsylvania
→1990Brimmer, John, Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→2002Brinton--King Farmstead — Pennsbury, Chester County, Pennsylvania
→1973Brinton, Edward, House — Chadds Ford, Chester County, Pennsylvania
→1990Brinton, George, House — Chadds Ford, Chester County, Pennsylvania
→1971Brinton's Mill — Chadds Ford, Chester County, Pennsylvania
→1987Bristol Historic District — Bristol, Bucks County, Pennsylvania
→1987Bristol Industrial Historic District — Bristol, Bucks County, Pennsylvania
→2002Broad Avenue Historic District — Altoona, Blair County, Pennsylvania
→1984Broad Street Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1974Broad Street Market — Harrisburg, Dauphin County, Pennsylvania
→1990Brobst Mill — Lenhartsville, Berks County, Pennsylvania
→1977Brockerhoff Hotel — Bellefonte, Centre County, Pennsylvania
→1979Brockerhoff Mill — Bellefonte, Centre County, Pennsylvania
→2003Brockwayville Passenger Depot, Buffalo, Rochester and Pittsburgh Railroad — Brockway, Jefferson County, Pennsylvania
→1990Brodbeck, S. B., Housing — Brodbecks, York County, Pennsylvania
→1979Brodhead Farm — Bushkill, Pike County, Pennsylvania
→1986Brooks, George L., School — Philadelphia, Philadelphia County, Pennsylvania
→1984Brookville Historic District — Brookville, Jefferson County, Pennsylvania
→1982Brookville Presbyterian Church and Manse — Brookville, Jefferson County, Pennsylvania
→1979Brotherton Farm — Chambersburg, Franklin County, Pennsylvania
→1988Brower's Bridge — Warwick, Chester County, Pennsylvania
→1992Brown--Moore Blacksmith Shop — Merrittstown, Fayette County, Pennsylvania
→1979Brown, Gottlieb, Covered Bridge — Potts Grove, Northumberland County, Pennsylvania
→1970Brown, John, House — Chambersburg, Franklin County, Pennsylvania
→1988Brown, Joseph H., School — Philadelphia, Philadelphia County, Pennsylvania
→1995Brown's, George, Sons Cotton and Woolen Mill — Mount Joy, Lancaster County, Pennsylvania
→2014Brownhill and Kramer Hosiery Mill — Philadelphia, Philadelphia County, Pennsylvania
→1976Brownlee, Samuel, House — Eighty-Four, Washington County, Pennsylvania
→1979Brownlee, Scott, Covered Bridge — West Finley, Washington County, Pennsylvania
→1994Brownsburg Village Historic District — Brownsburg, Bucks County, Pennsylvania
→1988Brownsville Bridge — Brownsville, Fayette County, Pennsylvania
→1993Brownsville Commercial Historic District — Brownsville, Fayette County, Pennsylvania
→1993Brownsville Northside Historic District — Brownsville, Fayette County, Pennsylvania
→1979Brumbaugh Homestead — Marklesburg, Huntingdon County, Pennsylvania
→1987Brush Creek Salems Church — Westmoreland City, Westmoreland County, Pennsylvania
→1975Brush Hill — Irwin, Westmoreland County, Pennsylvania
→2008Bryn Athyn Historic District ★ NHL — Bryn Athyn, Montgomery County, Pennsylvania
→1988Bryn Athyn--Lower Moreland Bridge — Lower Moreland, Montgomery County, Pennsylvania
→1973Bryn Mawr — Bryn Mawr, Montgomery County, Pennsylvania
→1979Bryn Mawr College Historic District — Bryn Mawr, Montgomery County, Pennsylvania
→1979Bryn Mawr Hotel — Bryn Mawr, Montgomery County, Pennsylvania
→1991Buchanan Furnace — Callensburg, Clarion County, Pennsylvania
→1966Buchanan, James, House ★ NHL — Lancaster, Lancaster County, Pennsylvania
→1987Bucher Thal Historic District — Denver, Lancaster County, Pennsylvania
→1979Bucher, Joseph, House — Marietta, Lancaster County, Pennsylvania
→1980Buck Hill Farm Covered Bridge — Lititz, Lancaster County, Pennsylvania
→1995Buck, A. W., House — Edensburg, Cambria County, Pennsylvania
→1997Buckingham Friends Meeting House — Lahaska, Bucks County, Pennsylvania
→2003Buckingham Friends Meeting House ★ NHL — Buckingham Township, Bucks County, Pennsylvania
→2002Buckmanville Historic District — Upper Makefield, Bucks County, Pennsylvania
→1984Buckwalter Building — West Chester, Chester County, Pennsylvania
→2007Budd, Edward G., Manufacturing Company — Philadelphia, Philadelphia County, Pennsylvania
→1976Buffalo Presbyterian Church — Lewisburg, Union County, Pennsylvania
→1993Buffalo, Rochester & Pittsburgh Railway Indiana Passenger Station — Indiana, Indiana County, Pennsylvania
→1980Buhl Building — Pittsburgh, Allegheny County, Pennsylvania
→1977Buhl, Frank H., Mansion — Sharon, Mercer County, Pennsylvania
→2018Buick Motor Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1979Bull, Thomas, House — Elverson, Chester County, Pennsylvania
→1979Burgholtshouse — East Prospect, York County, Pennsylvania
→1985Burk Brothers and Company — Philadelphia, Philadelphia County, Pennsylvania
→1978Burke Building — Pittsburgh, Allegheny County, Pennsylvania
→2002Burns, Jeremiah, Farm — Waynesboro, Franklin County, Pennsylvania
→1990Burnside Plantation — Bethlehem, Lehigh County, Pennsylvania
→1980Burnt Cabins Gristmill Property — Burnt Cabins, Fulton County, Pennsylvania
→1998Burnt Cabins Historic District — Dublin, Fulton County, Pennsylvania
→1984Burroughs, John, Homestead — Taylorsville, Bucks County, Pennsylvania
→1972Burtner Stone House — Natrona Heights, Allegheny County, Pennsylvania
→1966Bushy Run Battlefield ★ NHL — Harrison City, Westmoreland County, Pennsylvania
→1980Butcher's Mill Covered Bridge — Denver, Lancaster County, Pennsylvania
→1991Butler Armory — Butler, Butler County, Pennsylvania
→1977Butler County Courthouse — Butler, Butler County, Pennsylvania
→1995Butler County National Bank — Butler, Butler County, Pennsylvania
→2003Butler Historic District — Butler, Butler County, Pennsylvania
→1980Butler House — West Chester, Chester County, Pennsylvania
→1974Butler Street Gatehouse — Pittsburgh, Allegheny County, Pennsylvania
→2010Butterworth, H.W. and Sons Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1980Buttonwood Covered Bridge — Liberty, Lycoming County, Pennsylvania
→1983Byecroft Farm Complex — Buckingham, Bucks County, Pennsylvania
→1985Byerly House — New Kensington, Westmoreland County, Pennsylvania
→2002Byers Station Historic District — Upper Uwchlan, Chester County, Pennsylvania
→2002Byers--Muma House — East Donegal, Lancaster County, Pennsylvania
→1974Byers-Lyons House — Pittsburgh, Allegheny County, Pennsylvania
→1985Byrnes & Kiefer Building — Pittsburgh, Allegheny County, Pennsylvania
→1980Cabin Run Covered Bridge — Point Pleasant, Bucks County, Pennsylvania
→2015Caernarvon Presbyterian Church — Churchtown, Lancaster County, Pennsylvania
→1994Cairnbrook Historic District — Cairnbrook, Somerset County, Pennsylvania
→2002Cairnwood — Bryn Athyn, Montgomery County, Pennsylvania
→1996Caldwell Tavern — Claysville, Washington County, Pennsylvania
→1979Callahan House — Milford, Pike County, Pennsylvania
→2010Callowhill Industrial Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1984Caln Meeting House — Coatesville, Chester County, Pennsylvania
→2012Calvary Episcopal Church — Pittsburgh, Allegheny County, Pennsylvania
→1991Cambria City Historic District — Johnstown, Cambria County, Pennsylvania
→1980Cambria County Courthouse — Ebensburg, Cambria County, Pennsylvania
→1980Cambria County Jail — Ebensburg, Cambria County, Pennsylvania
→1972Cambria Public Library Building — Johnstown, Cambria County, Pennsylvania
→1988Cambridge Springs Bridge — Cambridge Springs, Crawford County, Pennsylvania
→1979Camelot — State College, Centre County, Pennsylvania
→2022Cameron County Courthouse — Emporium, Cameron County, Pennsylvania
→1975Cameron Estate — Mount Joy, Lancaster County, Pennsylvania
→1989Cameron, Col. James, House — Milton, Northumberland County, Pennsylvania
→1976Cameron, Simon, House and Bank — Middletown, Dauphin County, Pennsylvania
→1986Cameron, Simon, School — Harrisburg, Dauphin County, Pennsylvania
→1981Camp Curtin Fire Station — Harrisburg, Dauphin County, Pennsylvania
→2010Camp Curtin Memorial Methodist Episcopal Church — Harrisburg, Dauphin County, Pennsylvania
→1983Camp-Woods — Villanova, Delaware County, Pennsylvania
→1988Campbell Building — Crafton, Allegheny County, Pennsylvania
→1988Campbell's Bridge — Milford Square, Bucks County, Pennsylvania
→1985Camptown Historic District — LaMott, Montgomery County, Pennsylvania
→1989Canonsburg Armory — Canonsburg, Washington County, Pennsylvania
→1974Carbon County Jail — Jim Thorpe, Carbon County, Pennsylvania
→1979Carbon County Section of the Lehigh Canal — Weissport and Vicinity, Carbon County, Pennsylvania
→1983Carbondale City Hall and Courthouse — Carbondale, Lackawanna County, Pennsylvania
→1998Carl Mackley Houses — Philadelphia, Philadelphia County, Pennsylvania
→1989Carlisle Armory — Carlisle, Cumberland County, Pennsylvania
→1979Carlisle Historic District — Carlisle, Cumberland County, Pennsylvania
→1966Carlisle Indian School ★ NHL — Carlisle, Cumberland County, Pennsylvania
→1979Carmichaels Covered Bridge — Carmichael, Greene County, Pennsylvania
→1981Carnegie Free Library — Connellsville, Fayette County, Pennsylvania
→1980Carnegie Free Library — McKeesport, Allegheny County, Pennsylvania
→1974Carnegie Free Library of Allegheny — Pittsburgh, Allegheny County, Pennsylvania
→1973Carnegie Free Library Of Braddock ★ NHL — Braddock, Allegheny County, Pennsylvania
→1985Carnegie Free Library, Beaver Falls — Beaver Falls, Beaver County, Pennsylvania
→1979Carnegie Institute and Library — Pittsburgh, Allegheny County, Pennsylvania
→1981Carnegie, Andrew, Free Library — Carnegie, Allegheny County, Pennsylvania
→1988Carnell, Laura H., School — Philadelphia, Philadelphia County, Pennsylvania
→1970Carpenters' Hall ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1991Carrick Furnace — Metal, Franklin County, Pennsylvania
→2018Carroll, Charles, Public School — Philadelphia, Philadelphia County, Pennsylvania
→1991Carson College for Orphan Girls — Flourtown, Montgomery County, Pennsylvania
→1976Carson, Rachel, House — Springdale, Allegheny County, Pennsylvania
→1977Carter-Worth House and Farm — Marshallton, Chester County, Pennsylvania
→1978Carversville Historic District — Carversville, Bucks County, Pennsylvania
→1972Cashier's House — Erie, Erie County, Pennsylvania
→1983Cashiers House and Coach House (Boundary Increase) — Erie, Erie County, Pennsylvania
→1997Cassese, Joseph, House — Scranton, Lackawanna County, Pennsylvania
→1988Cassidy, Lewis C., School — Philadelphia, Philadelphia County, Pennsylvania
→1984Catasauqua Residential Historic District — Catasauqua, Lehigh County, Pennsylvania
→1978Catawissa Friends Meetinghouse — Catawissa, Columbia County, Pennsylvania
→1988Catharine, Joseph W., School — Philadelphia, Philadelphia County, Pennsylvania
→1975Cathedral of Learning — Pittsburgh, Allegheny County, Pennsylvania
→1971Cathedral of Saints Peter and Paul — Philadelphia, Philadelphia County, Pennsylvania
→1972Catlin Hall, Wilkes College — Wilkes-Barre, Luzerne County, Pennsylvania
→1971Cedarcroft ★ NHL — Kennett Square, Chester County, Pennsylvania
→1996Cement City Historic District — Donora, Washington County, Pennsylvania
→1988Centennial Bridge — Center Valley, Lehigh County, Pennsylvania
→1971Centennial National Bank — Philadelphia, Philadelphia County, Pennsylvania
→1985Center Bridge Historic District — Center Bridge, Bucks County, Pennsylvania
→1988Center City West Commercial Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2009Center City West Commercial Historic District (Boundary Increase) — Philadelphia, Philadelphia County, Pennsylvania
→1996Centerville Historic District — Centerville, Washington County, Pennsylvania
→1972Central Bethlehem Historic District — Bethlehem, Northampton County, Pennsylvania
→1986Central High School — Philadelphia, Philadelphia County, Pennsylvania
→1973Central Hotel — Mount Joy, Lancaster County, Pennsylvania
→1972Central Market — Lancaster, Lancaster County, Pennsylvania
→1984Central Norristown Historic District — Norristown, Montgomery County, Pennsylvania
→1979Central Railroad of New Jersey Freight Station — Scranton, Lackawanna County, Pennsylvania
→1976Central Railroad of New Jersey Station — Jim Thorpe, Carbon County, Pennsylvania
→1975Central Railroad of New Jersey Station — Wilkes-Barre, Luzerne County, Pennsylvania
→1984Central Trust Company Buildings — Altoona, Blair County, Pennsylvania
→2021Centre Avenue YMCA — Pittsburgh, Allegheny County, Pennsylvania
→1976Centre County Courthouse — Bellefonte, Centre County, Pennsylvania
→1979Centre Furnace Mansion House — State College, Centre County, Pennsylvania
→1976Centre Mills — Rebersburg, Centre County, Pennsylvania
→2008Century Building — Pittsburgh, Allegheny County, Pennsylvania
→1996Century Club of Scranton — Scranton, Lackawanna County, Pennsylvania
→1971Chad House — Chadds Ford, Delaware County, Pennsylvania
→1971Chadds Ford Historic District — Chadds Ford, Delaware County, Pennsylvania
→1974Chain Bridge — Easton, Northampton County, Pennsylvania
→2006Chalfont Historic District — Chalfont, Bucks County, Pennsylvania
→1985Chalybeate Springs Hotel — Bedford Borough, Bedford County, Pennsylvania
→1977Chamberlain-Pennell House — Media, Delaware County, Pennsylvania
→1979Chamberlin Iron Front Building — Lewisburg, Union County, Pennsylvania
→1978Chambersburg and Bedford Turnpike Road Company Toll House — St. Thomas, Franklin County, Pennsylvania
→1982Chambersburg Historic District — Chambersburg, Franklin County, Pennsylvania
→1972Chamounix — Philadelphia, Philadelphia County, Pennsylvania
→2010Chandler Mill Bridge — Kennett, Chester County, Pennsylvania
→1988Chandler, George, School — Philadelphia, Philadelphia County, Pennsylvania
→1974Chapman, John, House — New Hope, Bucks County, Pennsylvania
→2007Charleroi Historic District — Charleroi Borough, Washington County, Pennsylvania
→1988Charleroi--Monessen Bridge — Charleroi, Washington County, Pennsylvania
→1978Charlestown Village Historic District — Phoenixville, Chester County, Pennsylvania
→1978Chateau Crillon Apartment House — Philadelphia, Philadelphia County, Pennsylvania
→1998Chatham Village Historic District ★ NHL — Pittsburgh, Allegheny County, Pennsylvania
→1987Cherry Springs Picnic Pavilion — West Branch Township, Potter County, Pennsylvania
→1972Chester County Courthouse — West Chester, Chester County, Pennsylvania
→1972Chester Creek Historic District — Thornbury, Delaware County, Pennsylvania
→2001Chester Heights Camp Meeting Historic District — Chester Heights Borough, Delaware County, Pennsylvania
→1971Chester Springs Historic District — Chester Springs, Chester County, Pennsylvania
→2007Chester Waterside Station of the Philadelphia Electric Company — Chester, Delaware County, Pennsylvania
→2001Chestnut Hill — Windsor Township, York County, Pennsylvania
→1985Chestnut Hill Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2005Chestnut Ridge and Schellsburg Union Church and Cemetery — Napier Township, Bedford County, Pennsylvania
→1978Chestnut Street Log House — Lebanon, Lebanon County, Pennsylvania
→1978Cheyney, John, Log Tenant House and Farm — Cheyney, Delaware County, Pennsylvania
→2010Cheyney, Squire, Farm — Thornbury, Chester County, Pennsylvania
→1973Chichester Friends Meetinghouse — Boothwyn, Delaware County, Pennsylvania
→2005Chickies Historic District — Marietta Borough, Lancaster County, Pennsylvania
→1988Childs, George W., School — Philadelphia, Philadelphia County, Pennsylvania
→1970Christ Church ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1971Christ Church Burial Ground — Philadelphia, Philadelphia County, Pennsylvania
→1980Christ Hamilton United Lutheran Church and Cemetery — Hamilton Square, Monroe County, Pennsylvania
→1973Christman, Philip, House — Bally, Berks County, Pennsylvania
→1984Church Farm School Historic District — West Whiteland, Chester County, Pennsylvania
→1980Church Hill Farm — Mercersburg, Franklin County, Pennsylvania
→1974Church of St. James the Less ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1973Church of the Holy Trinity — Philadelphia, Philadelphia County, Pennsylvania
→1995Churchville Historic District — Churchville, Bucks County, Pennsylvania
→1985Cintra — New Hope, Bucks County, Pennsylvania
→2002Citizens National Bank of Latrobe — Latrobe, Westmoreland County, Pennsylvania
→1982City Hall — Reading, Berks County, Pennsylvania
→1988City Line Avenue Bridge — Philadelphia, Philadelphia County, Pennsylvania
→1980City Park Brewery — Philadelphia, Philadelphia County, Pennsylvania
→1979Clarion County Courthouse and Jail — Clarion, Clarion County, Pennsylvania
→2011Clark, Sen. Joseph O., House — Glen Campbell Borough, Indiana County, Pennsylvania
→1978Clark, Silas M., House — Indiana, Indiana County, Pennsylvania
→2021Clark’s Ferry Tavern — Duncannon, Perry County, Pennsylvania
→1973Clarkson-Watson House — Philadelphia, Philadelphia County, Pennsylvania
→2003Class and Nachod Brewery — Philadelphia, Philadelphia County, Pennsylvania
→1987Clear Creek State Park Day Use District — Sigel, Jefferson County, Pennsylvania
→1987Clear Creek State Park Family Cabin District — Sigel, Jefferson County, Pennsylvania
→1996Clear Spring Mill — Dillsburg, York County, Pennsylvania
→1989Clearfield Armory — Clearfield, Clearfield County, Pennsylvania
→1979Clearfield County Courthouse — Clearfield, Clearfield County, Pennsylvania
→1972Cliffs, The — Philadelphia, Philadelphia County, Pennsylvania
→2002Cline's Church of the United Brethren in Christ — Menallen, Adams County, Pennsylvania
→1980Clinger-Moses Mill Complex — Chester Springs, Chester County, Pennsylvania
→1972Clinton Street Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1966Cliveden ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1978Cloud Home — Pottsville, Schuylkill County, Pennsylvania
→1989Clow, James Beach, House — Ellwood City, Beaver County, Pennsylvania
→1999Coalport Historic District — Coalport, Clearfield County, Pennsylvania
→1984Coates, Moses, Jr., Farm — Phoenixville, Chester County, Pennsylvania
→1987Coatesville Historic District — Coatesville, Chester County, Pennsylvania
→2013Coatesville Veterans Administration Hospital Historic District — Coatesville, Chester County, Pennsylvania
→1998Cobbs Creek Automobile Suburb Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1984Cochran, Philip G., Memorial United Methodist Church — Dawson, Fayette County, Pennsylvania
→1991Codorus Forge and Furnace Historic District — Saginaw, York County, Pennsylvania
→2005Coffee Pot, The — Bedford Township, Bedford County, Pennsylvania
→1977Coffeetown Grist Mill — Easton, Northampton County, Pennsylvania
→1980Cogan House Covered Bridge — Cogan House, Lycoming County, Pennsylvania
→1983Cold Point Historic District — Norristown, Montgomery County, Pennsylvania
→1988Cold Spring Bridge — North Hampton, Lehigh County, Pennsylvania
→2000Cold Spring Farm — Todd, Fulton County, Pennsylvania
→1979Cold Spring Farm Springhouse — Monroe, Monroe County, Pennsylvania
→1996Coldbrook Farm — Chambersburg, Franklin County, Pennsylvania
→1973Cole, Warren Z., House — Skippack, Montgomery County, Pennsylvania
→2010Colebrook Iron Master's House — South Londonderry, Lebanon County, Pennsylvania
→1984Colebrook Manor — Exton, Chester County, Pennsylvania
→1980Colemanville Covered Bridge — Pequea, Lancaster County, Pennsylvania
→1990Colerain Forges Mansion — Franklinville, Huntingdon County, Pennsylvania
→1986Colfax Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1978College Hall, University Of Pennsylvania — Philadelphia, Philadelphia County, Pennsylvania
→1995College Heights Historic District — State College, Centre County, Pennsylvania
→2008College of Physicians of Philadelphia Building ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1988Collen Brook Farm — Upper Darby Twnshp., Delaware County, Pennsylvania
→1995Colley, Abel, Tavern — Searights Crossroads, Fayette County, Pennsylvania
→1973Colley, Peter, Tavern and Barn — Brier Hill, Fayette County, Pennsylvania
→1972Collins Mansion — West Chester, Chester County, Pennsylvania
→1966Colonial Germantown Historic District ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1987Colonial Germantown Historic District (Boundary Increase) — Philadelphia, Philadelphia County, Pennsylvania
→2002Colonial National Bank Building — Connellsville, Fayette County, Pennsylvania
→1982Colonial Theatre — Harrisburg, Dauphin County, Pennsylvania
→1987Colton Point State Park — Ansonia, Tioga County, Pennsylvania
→1999Coltrane, John, House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1983Columbia Historic District — Columbia, Lancaster County, Pennsylvania
→2001Columbia Wagon Works — Columbia Borough, Lancaster County, Pennsylvania
→1994Colver Historic District — Colver, Cambria County, Pennsylvania
→2003Colver--Rogers Farmstead — Jefferson, Greene County, Pennsylvania
→1988Colwell Cut Viaduct — Seminole, Armstrong County, Pennsylvania
→1979Combination Baggage and Mail Car No. 5403 — Strasburg, Lancaster County, Pennsylvania
→1980Comerford Theater — Wilkes-Barre, Luzerne County, Pennsylvania
→1988Comly, Watson, School — Philadelphia, Philadelphia County, Pennsylvania
→1976Commandant's Quarters — Philadelphia, Philadelphia County, Pennsylvania
→1985Commercial Hotel — Dubois, Clearfield County, Pennsylvania
→1994Commodore Historic District — Commodore, Indiana County, Pennsylvania
→1985Como Farm — W. Bradford Twp., Chester County, Pennsylvania
→1995Compass Inn — Laughlintown, Westmoreland County, Pennsylvania
→1978Compton and Bloomfield — Philadelphia, Philadelphia County, Pennsylvania
→1977Concord Friends Meetinghouse — Concordville, Delaware County, Pennsylvania
→2014Concord School — Loyalhanna Township, Westmoreland County, Pennsylvania
→1973Concordville Historic District — Concordville, Delaware County, Pennsylvania
→1996Conestoga Cork Works Building — Lancaster, Lancaster County, Pennsylvania
→1975Conewago Chapel — Hanover, Adams County, Pennsylvania
→1983Congregational Store — Lititz, Lancaster County, Pennsylvania
→1988Conn, John P., House — Uniontown, Fayette County, Pennsylvania
→1979Connell Mansion — Ephrata, Lancaster County, Pennsylvania
→1991Connellsville Armory — Connellsville, Fayette County, Pennsylvania
→1996Connellsville Union Passenger Depot — Connellsville, Fayette County, Pennsylvania
→1986Connelly, Clifford B., Trade School — Pittsburgh, Allegheny County, Pennsylvania
→2007Connely--Holeman House — Pleasantville Borough, Venango County, Pennsylvania
→1986Conroy Junior High School — Pittsburgh, Allegheny County, Pennsylvania
→2000Consolidated Ice Company Factory No. 2 — Pittsburgh, Allegheny County, Pennsylvania
→1979Consolidation Freight Locomotive No. 1187 — Strasburg, Lancaster County, Pennsylvania
→1979Consolidation Freight Locomotive No. 2846 — Strasburg, Lancaster County, Pennsylvania
→1979Consolidation Freight Locomotive No. 7688 — Strasburg, Lancaster County, Pennsylvania
→1999Consumers Cigar Box Company — Red Lion, York County, Pennsylvania
→1986Continental Stove Works — Royersford, Montgomery County, Pennsylvania
→1988Conwell, Russell H., School — Philadelphia, Philadelphia County, Pennsylvania
→1972Conyngham-Hacker House — Philadelphia, Philadelphia County, Pennsylvania
→1987Cook Forest State Park Indian Cabin District — Cooksburg, Forest County, Pennsylvania
→1987Cook Forest State Park River Cabin District — Cooksburg, Forest County, Pennsylvania
→1979Cook, Anthony Wayne, Mansion — Cooksburg, Forest County, Pennsylvania
→1978Cook, Col. Edward, House — Belle Vernon, Fayette County, Pennsylvania
→1988Cooke, Jay, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1972Cookes House — York, York County, Pennsylvania
→1982Coopersburg Historic District — Coopersburg, Lehigh County, Pennsylvania
→1975Cope, Edward Drinker, House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1980Coplay Cement Company Kilns — Coplay, Lehigh County, Pennsylvania
→1991Coraopolis Armory — Coraopolis, Allegheny County, Pennsylvania
→1986Coraopolis Bridge — Coraopolis, Allegheny County, Pennsylvania
→1979Coraopolis Railroad Station — Coraopolis, Allegheny County, Pennsylvania
→1990Corbin Bridge — Huntingdon, Huntingdon County, Pennsylvania
→1984Corbley, John, Farm — Garards Fort, Greene County, Pennsylvania
→2003Corker Hill — Greene Township, Franklin County, Pennsylvania
→1974Cornwall & Lebanon Railroad Station — Lebanon, Lebanon County, Pennsylvania
→1966Cornwall Iron Furnace ★ NHL — Cornwall, Lebanon County, Pennsylvania
→1991Corry Armory — Corry, Erie County, Pennsylvania
→1973Corson, Alan W., Homestead — Plymouth Meeting, Montgomery County, Pennsylvania
→1986Cotton and Maple Streets School — Reading, Berks County, Pennsylvania
→1976Coudersport and Port Allegany Railroad Station — Coudersport, Potter County, Pennsylvania
→1985Coudersport Historic District — Coudersport, Potter County, Pennsylvania
→1985Coulsontown Cottages Historic District — Delta, York County, Pennsylvania
→1988County Bridge No. 101 — Rock Run, Chester County, Pennsylvania
→1988County Bridge No. 124 — Downingtown, Chester County, Pennsylvania
→1988County Bridge No. 148 — Westtown, Chester County, Pennsylvania
→1988County Bridge No. 171 — Malvern, Chester County, Pennsylvania
→1988County Bridge No. 36 — Portland, Northampton County, Pennsylvania
→1988County Bridge No. 54 — Prospectville, Montgomery County, Pennsylvania
→1974Coventry Hall — Coventryville, Chester County, Pennsylvania
→1978Coventryville Historic District — Pottstown, Chester County, Pennsylvania
→1987Cowans Gap State Park Family Cabin District — Chambersburg, Fulton County, Pennsylvania
→1984Cox, Hewson, House — West Whiteland, Chester County, Pennsylvania
→1986Craft, Gershom, House — Morrisville, Bucks County, Pennsylvania
→1983Cramond — Strafford, Chester County, Pennsylvania
→2007Craven Hall — Warminster Heights, Bucks County, Pennsylvania
→1979Crawford Covered Bridge — West Finley, Washington County, Pennsylvania
→2020Crawford Grill No. 2 — Pittsburgh, Allegheny County, Pennsylvania
→1995Crawford, John Minor, House — Glassworks, Greene County, Pennsylvania
→1992Crawford, William, House — Carmichaels, Greene County, Pennsylvania
→1979Creasyville Covered Bridge — Millville, Columbia County, Pennsylvania
→2002Cree, William, House — Jefferson Township, Greene County, Pennsylvania
→1988Creighton, Thomas, School — Philadelphia, Philadelphia County, Pennsylvania
→1972Cressbrook Farm — Valley Forge, Chester County, Pennsylvania
→1976Crook Farm — Bradford, McKean County, Pennsylvania
→1969Crooks Stone Barn ★ NHL — New Hope, Bucks County, Pennsylvania
→2003Crosley--Garrett Mill Workers' Housing, Store and Mill Site — Newtown Township, Delaware County, Pennsylvania
→1988Crossan, Kennedy, School — Philadelphia, Philadelphia County, Pennsylvania
→1973Crozer, George K., Mansion — Upland, Delaware County, Pennsylvania
→1980Crozer, John P., II, Mansion — Upland, Delaware County, Pennsylvania
→1980Culbertson-Harbison Farm — Nyesville, Franklin County, Pennsylvania
→1979Cumberland Valley Car — Strasburg, Lancaster County, Pennsylvania
→1978Cumberland Valley Railroad Station and Station Master's House — Mechanicsburg, Cumberland County, Pennsylvania
→1985Cumberland Valley State Normal School Historic District — Shippensburg, Cumberland County, Pennsylvania
→1971Curtin Village — Curtin, Centre County, Pennsylvania
→2014Curtis and Jones Company Shoe Factory — Reading, Berks County, Pennsylvania
→2002Curtis Arboretum — Cheltenham, Montgomery County, Pennsylvania
→2002Cuttalossa Valley Historic District — Solebury, Bucks County, Pennsylvania
→1993D & H Canal Co. Office — Lackawaxen, Pike County, Pennsylvania
→2003Dager--Wonsettler Farmstead — Glyde, Washington County, Pennsylvania
→1991Dale Furnace and Forge Historic District — Bally, Berks County, Pennsylvania
→1982Dale, Felix, Stone House — Lemont, Centre County, Pennsylvania
→1975Dale, Samuel F., House — Franklin, Venango County, Pennsylvania
→1992Damascus Historic District — Damascus, Wayne County, Pennsylvania
→1979Danley Covered Bridge — West Finley, Washington County, Pennsylvania
→1994Danville Historic District — Danville, Montour County, Pennsylvania
→1985Danville West Market Street Historic District — Danville, Montour County, Pennsylvania
→1978Darby Meeting — Darby, Delaware County, Pennsylvania
→1986Darrah, Lydia, School — Philadelphia, Philadelphia County, Pennsylvania
→1988Dauberville Bridge — Dauberville, Berks County, Pennsylvania
→1993Dauphin County Bridge No. 27 — Pillow, Dauphin County, Pennsylvania
→1993Dauphin County Courthouse — Harrisburg, Dauphin County, Pennsylvania
→1982Davies House — East Berkley, Berks County, Pennsylvania
→1991Davies, Edward, House — Churchtown, Lancaster County, Pennsylvania
→1979Davis Covered Bridge — Catawissa, Columbia County, Pennsylvania
→1980Davis Island Lock and Dam Site — Avalon, Allegheny County, Pennsylvania
→1973Davis, Daniel, House and Barn — Birmingham, Chester County, Pennsylvania
→1994Davis, David, Farm — New Holland, Lancaster County, Pennsylvania
→1979Davis, Horn, Overholtzer Bridge — North Fredericktown, Washington County, Pennsylvania
→1991Dawesfield — Ambler, Montgomery County, Pennsylvania
→1997Dawson Historic District — Dawson, Fayette County, Pennsylvania
→1979Day Covered Bridge — Prosperity, Washington County, Pennsylvania
→1979DDI Electric Locomotive No. 36 — Strasburg, Lancaster County, Pennsylvania
→1998Decker's Chapel — St. Marys, Elk County, Pennsylvania
→1995Deer Creek Bridge, Stewartstown Railroad — Shrewsbury, York County, Pennsylvania
→1977Deery Family Homestead — Phoenixville, Chester County, Pennsylvania
→1992Defibaugh Tavern — Bedford, Bedford County, Pennsylvania
→1985DeHaven, Harry, House — Coatesville, Chester County, Pennsylvania
→1985Deisher, H. K., Knitting Mill — Kutztown, Berks County, Pennsylvania
→1968Delaware Aqueduct — Lackawaxen, Pike County, Pennsylvania
→1987Delaware County National Bank — Chester, Delaware County, Pennsylvania
→1974Delaware Division of the Pennsylvania Canal ★ NHL — Easton, Bucks County, Pennsylvania
→1977Delaware, Lackawanna and Western Railroad Station — Scranton, Lackawanna County, Pennsylvania
→2002Delaware, Lackawanna and Western Railroad Water Gap Staion — Delaware Water Gap, Monroe County, Pennsylvania
→1990Delaware, Lackawanna and Western Railroad Yard--Dickson Manufacturing Co. Site — Scranton, Lackawanna County, Pennsylvania
→2018Delbar Products, Inc. — Perkasie, Bucks County, Pennsylvania
→1980Dellville Covered Bridge — Dellville, Perry County, Pennsylvania
→1982Delmar Apartments — Philadelphia, Philadelphia County, Pennsylvania
→1983Delta Historic District — Delta, York County, Pennsylvania
→1995Delta Trestle Bridge, Maryland and Pennsylvania Railroad — Delta, York County, Pennsylvania
→1970Denison House — Forty Fort, Luzerne County, Pennsylvania
→1986Dent Hardware Company Factory Complex — Whitehall, Lehigh County, Pennsylvania
→1973Derbydown Homestead — Northbrook, Chester County, Pennsylvania
→1974Derrow, Margaret, House — Claysville, Washington County, Pennsylvania
→2006Derry Session House and Enclosure — Hershey, Dauphin County, Pennsylvania
→1972Deshler-Morris House — Philadelphia, Philadelphia County, Pennsylvania
→1983Deutschtown Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1979Devil's Den, McClurg Covered Bridge — Paris, Washington County, Pennsylvania
→1992Diamond Silk Mill — East York, York County, Pennsylvania
→2007Dick Building — West Newton, Westmoreland County, Pennsylvania
→1990Dickson Tavern — Erie, Erie County, Pennsylvania
→1979Dickson Works — Scranton, Lackawanna County, Pennsylvania
→1987Diehl, George, Homestead — Indiana, Indiana County, Pennsylvania
→1980Diehls Covered Bridge — New Buena Vista, Bedford County, Pennsylvania
→2004Dill's Tavern — Dillsburg, York County, Pennsylvania
→1979Dillingersville Union School and Church — Zionsville, Lehigh County, Pennsylvania
→1986Dilworth Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1973Dilworthtown Historic District — Dilworthtown, Chester County, Pennsylvania
→1978Dime Bank Building — Scranton, Lackawanna County, Pennsylvania
→1985Dime Savings and Trust Company — Allentown, Lehigh County, Pennsylvania
→1980Dimeling Hotel — Clearfield, Clearfield County, Pennsylvania
→1979Dimmsville Covered Bridge — Dimmsville, Juniata County, Pennsylvania
→1979Dingman's Ferry Dutch Reformed Church — Dingman's Ferry, Pike County, Pennsylvania
→1988Disston, Hamilton, School — Philadelphia, Philadelphia County, Pennsylvania
→1988Disston, Mary, School — Philadelphia, Philadelphia County, Pennsylvania
→1996Doak--Little House — South Strabane Twp., Washington County, Pennsylvania
→1973Dobbin House — Gettysburg, Adams County, Pennsylvania
→1988Dobbins, Murrell, Vocational School — Philadelphia, Philadelphia County, Pennsylvania
→1988Dobson Mills — Philadelphia, Philadelphia County, Pennsylvania
→1988Dobson, James, School — Philadelphia, Philadelphia County, Pennsylvania
→1985Doe Run Village Historic District — W. Marlborough Twp., Chester County, Pennsylvania
→1980Dohner, Michael, Farmhouse — Lancaster, Lancaster County, Pennsylvania
→1994Dolington Village Historic District — Dolington, Bucks County, Pennsylvania
→1976Dollar Savings Bank — Pittsburgh, Allegheny County, Pennsylvania
→1987Donaldson, Widow, Place — Fort Loudon, Franklin County, Pennsylvania
→1990Donaldson, William, House — Harrisburg, Dauphin County, Pennsylvania
→1978Donegal Mills Plantation — Mount Joy, Lancaster County, Pennsylvania
→1985Donegal Presbyterian Church Complex — East Donegal Township, Lancaster County, Pennsylvania
→1978Dorflinger, Eugene, Estate — White Mills, Wayne County, Pennsylvania
→1977Dorneyville Crossroad Settlement — Allentown, Lehigh County, Pennsylvania
→1986Dorrance Mansion — Bristol, Bucks County, Pennsylvania
→1974Dorsey, Joseph, House — West Brownsville, Washington County, Pennsylvania
→1985Dougherty, Edward, House — Coatesville, Chester County, Pennsylvania
→1985Dougherty, Philip, House — Coatesville, Chester County, Pennsylvania
→1985Dougherty, Philip, Tavern — Coatesville, Chester County, Pennsylvania
→1994Douglas, John S., House — Uniontown, Fayette County, Pennsylvania
→2009Douglass, George, House — Amity Township, Berks County, Pennsylvania
→1990Douglass, John, House — Kirkwood, Lancaster County, Pennsylvania
→1995Downer Tavern — Chalkhill, Fayette County, Pennsylvania
→1990Downing, Hunt, House — Exton, Chester County, Pennsylvania
→1990Downing, Hunt, House (Boundary Decrease) — Exton, Chester County, Pennsylvania
→1979Downingtown Log House — Downingtown, Chester County, Pennsylvania
→1992Downtown Altoona Historic District — Altoona, Blair County, Pennsylvania
→2004Downtown Altoona Historic District (Boundary Increase) — Altoona, Blair County, Pennsylvania
→1993Downtown Indiana Historic District — Indiana, Indiana County, Pennsylvania
→1992Downtown Johnstown Historic District — Johnstown, Cambria County, Pennsylvania
→2012Downtown Wayne Historic District — Wayne, Delaware County, Pennsylvania
→1985Doylestown Historic District — Doylestown, Bucks County, Pennsylvania
→1978Drake Hotel — Philadelphia, Philadelphia County, Pennsylvania
→1983Drake Log Cabin — Apollo, Armstrong County, Pennsylvania
→1966Drake Oil Well ★ NHL — Titusville, Venango County, Pennsylvania
→1979Dreese's Covered Bridge — Beavertown, Snyder County, Pennsylvania
→1990Dreibelbis Mill — Shoemakersville, Berks County, Pennsylvania
→1981Dreibelbis Station Bridge — Kutztown, Berks County, Pennsylvania
→1989Dreibelbis, Joel, Farm — Virginville, Berks County, Pennsylvania
→1980Drexel and Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1982Drexel Development Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1986Drexel, Francis M., School — Philadelphia, Philadelphia County, Pennsylvania
→1971Drinker's Court — Philadelphia, Philadelphia County, Pennsylvania
→1977Dritt Mansion — Wrightsville, York County, Pennsylvania
→1975Dropsie University Complex — Philadelphia, Philadelphia County, Pennsylvania
→1985Drovers Inn — Coatesville, Chester County, Pennsylvania
→2012Drueding Brothers Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1979Druim Moir Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1997Dubois Historic District — DuBois, Clearfield County, Pennsylvania
→1980Dunbar-Creigh House — Landisburg, Perry County, Pennsylvania
→1986Dunbar, Paul Lawrence, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Dungan, Pugh, House — Doylestown, Bucks County, Pennsylvania
→1986Dunlap, Thomas, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Dunlap, William B., Mansion — Bridgewater, Beaver County, Pennsylvania
→1978Dunlap's Creek Bridge — Brownsville, Fayette County, Pennsylvania
→2015Duquesne Brewing Company — Pittsburgh, Allegheny County, Pennsylvania
→1975Duquesne Incline — Pittsburgh, Allegheny County, Pennsylvania
→1976Durham Mill and Furnace — Durham, Bucks County, Pennsylvania
→1988Durham, Thomas, School — Philadelphia, Philadelphia County, Pennsylvania
→1975Dusmal House — Gastonville, Washington County, Pennsylvania
→1987Dyerstown Historic District — Plumstead Township, Bucks County, Pennsylvania
→1999Dykeman's Spring — Shippenburg, Cumberland County, Pennsylvania
→2022E.A. Wright Bank Note Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1977Eagle Hotel — Waterford, Erie County, Pennsylvania
→1978Eagle Tavern — New Hope, Bucks County, Pennsylvania
→1996Eagles Mere Historic District — Eagles Mere, Sullivan County, Pennsylvania
→2013Eagles Mere Historic District (Boundary Increase) — Eagles Mere Borough, Sullivan County, Pennsylvania
→2005Eakin, John, Farm — Springfield Township, Bucks County, Pennsylvania
→1966Eakins, Thomas, House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1985East Berlin Historic District — East Berlin, Adams County, Pennsylvania
→1973East Bradford Boarding School for Boys — Lenape, Chester County, Pennsylvania
→1966East Broad Top Railroad ★ NHL — Rockhill Furnace, Huntingdon County, Pennsylvania
→1983East Carson Street Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1984East Center City Commercial Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1979East Lancaster Avenue Historic District — Downingtown, Chester County, Pennsylvania
→2010East Liberty Commercial Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1977East Liberty Market — Pittsburgh, Allegheny County, Pennsylvania
→1979East Oriental Covered Bridge — Oriental, Juniata County, Pennsylvania
→1991East Stroudsburg Armory — East Stroudsburg, Monroe County, Pennsylvania
→1980East Stroudsburg Railroad Station — East Stroudsburg, Monroe County, Pennsylvania
→1984East Washington Historic District — East Washington, Washington County, Pennsylvania
→1999East York Historic District — Springettsbury Township, York County, Pennsylvania
→1973East, Nicholas, House — Valley Forge, Chester County, Pennsylvania
→1966Eastern State Penitentiary ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1990Easton Cemetery — Easton, Northampton County, Pennsylvania
→1983Easton Historic District — Easton, Northampton County, Pennsylvania
→1980Easton House — Easton, Northampton County, Pennsylvania
→1979Ebenezer Covered Bridge — Ginger Hill, Washington County, Pennsylvania
→1987Eberhardt and Ober Brewery — Pittsburgh, Allegheny County, Pennsylvania
→1973Eberly, Johannes, House — Mechanicsburg, Cumberland County, Pennsylvania
→1989Eby Shoe Corporation — Ephrata, Lancaster County, Pennsylvania
→1971Eckley Historic District — Eckley, Luzerne County, Pennsylvania
→1979Eckman, Sam, Covered Bridge No. 92 — Millville, Columbia County, Pennsylvania
→1985Economy Historic District — Ambridge, Beaver County, Pennsylvania
→2019Edelman Schoolhouse — Moore Township, Northampton County, Pennsylvania
→2010Eden Cemetery — Collingdale, Delaware County, Pennsylvania
→1977Edgemont — Langhorne, Bucks County, Pennsylvania
→1973Edgewood — West Chester, Chester County, Pennsylvania
→1988Edmunds, Henry R., School — Philadelphia, Philadelphia County, Pennsylvania
→2020Edward Corner Marine Merchandise Warehouse — Philadelphia, Philadelphia County, Pennsylvania
→1979Egg Hill Church — Spring Mills, Centre County, Pennsylvania
→2017Ehrenhardt, Jacob Jr., House — Emmanus, Lehigh County, Pennsylvania
→1987Ehrhart's Mill Historic District — Hellertown, Northampton County, Pennsylvania
→1995Eichelberger High School — Hanover, York County, Pennsylvania
→1967Eisenhower National Historic Site ★ NHL — Gettysburg, Adams County, Pennsylvania
→1990Eisenlohr--Bayuk Tobacco Historic District — Lancaster, Lancaster County, Pennsylvania
→1977Elder, Abraham, Stone House — Stormstown, Centre County, Pennsylvania
→1982Electric Locomotive No. 4859 — Strasburg, Lancaster County, Pennsylvania
→1966Elfreth's Alley Historic District ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1991Eliza Furnace — Vintonville, Cambria County, Pennsylvania
→2023Elk's Lodge BPOE No. 2 — Philadelphia, Philadelphia County, Pennsylvania
→1990Elkins Railroad Station, Philadelphia and Reading Railroad — Elkins Park, Montgomery County, Pennsylvania
→1972Ellicott, Andrew, House — Lancaster, Lancaster County, Pennsylvania
→1987Elliott, S. B., State Park Day Use District — Clearfield, Clearfield County, Pennsylvania
→1987Elliott, S. B., State Park Family Cabin District — Clearfield, Clearfield County, Pennsylvania
→1979Elm Court — Butler, Butler County, Pennsylvania
→2005Elmridge — Leetsdale, Allegheny County, Pennsylvania
→1988Elmwood Park Historic District — Bethlehem, Northampton County, Pennsylvania
→1993Elverson Historic District — Elverson, Chester County, Pennsylvania
→1988Elverson, James, Jr., School — Philadelphia, Philadelphia County, Pennsylvania
→1985Ely, Joshua, House — New Hope, Bucks County, Pennsylvania
→1998Embassy Theatre — Lewistown, Mifflin County, Pennsylvania
→1985Embreeville Historic District — Newlin Twp., Chester County, Pennsylvania
→1984Emig Mansion — Emigsville, York County, Pennsylvania
→1988Emlen, Eleanor Cope, School of Practice — Philadelphia, Philadelphia County, Pennsylvania
→1997Emlenton Historic District — Emlenton, Venango County, Pennsylvania
→1974Emmanuel Episcopal Church ★ NHL — Pittsburgh, Allegheny County, Pennsylvania
→2022Engine Company No. 29 — Philadelphia, Philadelphia County, Pennsylvania
→1973Englehardt, John, Homestead — Schwenksville, Montgomery County, Pennsylvania
→1978English Center Suspension Bridge — English Center, Lycoming County, Pennsylvania
→1967Ephrata Cloister ★ NHL — Ephrata, Lancaster County, Pennsylvania
→2006Ephrata Commercial Historic District — Ephrata, Lancaster County, Pennsylvania
→1999Equinunk Historic District — Equinunk, Wayne County, Pennsylvania
→1986Equitable Trust Building — Philadelphia, Philadelphia County, Pennsylvania
→1980Erb's Covered Bridge — Rothsville, Lancaster County, Pennsylvania
→1985Ercildoun Historic District — Coatesville, Chester County, Pennsylvania
→1989Erie Armory — Erie, Erie County, Pennsylvania
→1993Erie Federal Courthouse and Post Office — Erie, Erie County, Pennsylvania
→1978Erie Land Lighthouse — Erie, Erie County, Pennsylvania
→1972Erie Railroad Station — Susquehanna, Susquehanna County, Pennsylvania
→2000Erie Trust Company Building — Erie, Erie County, Pennsylvania
→1979Erpff, Philip, House — Schaefferstown, Lebanon County, Pennsylvania
→1979Erskine Covered Bridge — West Alexander, Washington County, Pennsylvania
→1980Erwinna Covered Bridge — Erwinna, Bucks County, Pennsylvania
→2023Esherick, Margaret, House — Philadelphia, Philadelphia County, Pennsylvania
→1973Esherick, Wharton, Studio ★ NHL — Malvern, Chester County, Pennsylvania
→1974Espy House ★ NHL — Bedford, Bedford County, Pennsylvania
→1983Estey Hall — Philadelphia, Philadelphia County, Pennsylvania
→1973Etna Furnace — Williamsburg, Blair County, Pennsylvania
→1991Etna Furnace (Boundary Decrease) — Mt. Etna, Blair County, Pennsylvania
→1991Etna Furnace (Boundary Increase) — Mt. Etna, Blair County, Pennsylvania
→1986Etters Bridge — Lower Allen Township, Cumberland County, Pennsylvania
→2002Evans, Ann Cunningham, House — Caernarvon, Lancaster County, Pennsylvania
→1983Evans, Benjamin, House — Nescopeck, Luzerne County, Pennsylvania
→2005Evans, William and Mordecai, House — Limerick Township, Montgomery County, Pennsylvania
→1972Evansburg Historic District — Evansburg, Montgomery County, Pennsylvania
→2003Everett Historic District — Everett, Bedford County, Pennsylvania
→1974Evergreen Hamlet — Pittsburgh, Allegheny County, Pennsylvania
→1979Everhart, William, Buildings — West Chester, Chester County, Pennsylvania
→1984Everhart, William, House — West Whiteland, Chester County, Pennsylvania
→1979Ewart Building — Pittsburgh, Allegheny County, Pennsylvania
→1974Experimental Mine, U.S. Bureau Of Mines — Bruceton, Allegheny County, Pennsylvania
→1983Exton Hotel — Exton, Chester County, Pennsylvania
→1977Eyre, Wilson, House — Philadelphia, Philadelphia County, Pennsylvania
→1980Factory Bridge — White Deer, Union County, Pennsylvania
→1976Fagley House — Phoenixville, Chester County, Pennsylvania
→1998Fair Hill Burial Ground — Philadelphia, Philadelphia County, Pennsylvania
→2023Fairelawn — Philadelphia, Philadelphia County, Pennsylvania
→2022Fairfax Apartments — Pittsburgh, Allegheny County, Pennsylvania
→2000Fairfield Historic District — Fairfield, Adams County, Pennsylvania
→1973Fairfield Inn — Fairfield, Adams County, Pennsylvania
→2002Fairmount Avenue Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1999Fairmount Historic District — York City, York County, Pennsylvania
→1976Fairmount Water Works ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2010Fairview Park — Salem Township, Westmoreland County, Pennsylvania
→1996Fairville Historic District — Kennett Square, Chester County, Pennsylvania
→1974Fallingwater ★ NHL — Mill Run, Fayette County, Pennsylvania
→1972Fallsington Historic District — Fallsington, Bucks County, Pennsylvania
→1972Farmar Mill — Fort Washington, Montgomery County, Pennsylvania
→1986Farmer's Southern Market — Lancaster, Lancaster County, Pennsylvania
→1983Farmers and Mechanics Trust Company Building — West Chester, Chester County, Pennsylvania
→1977Farmers Market — York, York County, Pennsylvania
→1981Farmers' High School — State College, Centre County, Pennsylvania
→1986Farragut, David, School — Philadelphia, Philadelphia County, Pennsylvania
→1991Farrandsville Iron Furnace — Farrandsville, Clinton County, Pennsylvania
→1986Fayette School — Philadelphia, Philadelphia County, Pennsylvania
→1995Fayette--Springs Hotel — Chalk Hill, Fayette County, Pennsylvania
→1980Federal Barn — Valley Forge, Chester County, Pennsylvania
→1984Federal Row — Erie, Erie County, Pennsylvania
→1971Federal School — Haverford, Delaware County, Pennsylvania
→1986Federal Street School — Philadelphia, Philadelphia County, Pennsylvania
→1988Fell, D. Newlin, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Feltons Mill Covered Bridge — Bedford, Bedford County, Pennsylvania
→1988Feltonville School No. 2 — Philadelphia, Philadelphia County, Pennsylvania
→1976Fenner-Snyder Mill — Sciota, Monroe County, Pennsylvania
→1988Ferguson, Joseph C., School — Philadelphia, Philadelphia County, Pennsylvania
→1980Ferguson, William, Farm — Glen Moore, Chester County, Pennsylvania
→1985Ferron, John, House — Londonderry Township, Chester County, Pennsylvania
→1999Fetter's Mill — Lower Moreland, Montgomery County, Pennsylvania
→2006Fetter's Mill Village Historic District — Byrn Athyn Borough, Montgomery County, Pennsylvania
→1973Fidelity Mutual Life Insurance Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1978Fidelity-Philadelphia Trust Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1986Fifth Avenue High School — Pittsburgh, Allegheny County, Pennsylvania
→2023Fighter’s Heaven — Orwigsburg, Schuylkill County, Pennsylvania
→1976Finch Building — Scranton, Lackawanna County, Pennsylvania
→1983Findlay Farm — Lamasters, Franklin County, Pennsylvania
→1988Finletter, Thomas K., School — Philadelphia, Philadelphia County, Pennsylvania
→1974Finley, James, House — Chambersburg, Franklin County, Pennsylvania
→1981Fireman's Drinking Fountain — Slatington, Lehigh County, Pennsylvania
→1987First Bank of the United States ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2023First Baptist Church of Germantown — Philadelphia, Philadelphia County, Pennsylvania
→1988First Church of Christ, Scientist — Scranton, Lackawanna County, Pennsylvania
→2019First Federal Savings and Loan Association of Philadelphia, Northeast Branch — Philadelphia, Philadelphia County, Pennsylvania
→2014First Methodist Episcopal Church of McKeesport — McKeesport, Allegheny County, Pennsylvania
→2005First National Bank in Fleetwood — Fleetwood, Berks County, Pennsylvania
→2007First National Bank of Charleroi — Charleroi Borough, Washington County, Pennsylvania
→1972First Presbyterian Church of West Chester — West Chester, Chester County, Pennsylvania
→2017First Troop Philadelphia City Cavalry Armory — Philadelphia, Philadelphia County, Pennsylvania
→2023First Unitarian Church — Philadelphia, Philadelphia County, Pennsylvania
→2020First United Presbyterian Church of Braddock — Braddock, Allegheny County, Pennsylvania
→2003First Universalish Church of Sharpsville — Sharpsville, Mercer County, Pennsylvania
→1988Firstside Historic District — Pittsburgh, Allegheny County, Pennsylvania
→2013Firstside Historic District (Boundary Increase) — Pittsburgh, Allegheny County, Pennsylvania
→1980Fischtner Covered Bridge — Stringtown, Bedford County, Pennsylvania
→1991Fisher, Adam, Homestead — United, Westmoreland County, Pennsylvania
→1973Fisher, Henry, House — Yellow House, Berks County, Pennsylvania
→1977Fisher, Maj. Jared B., House — Spring Mills, Centre County, Pennsylvania
→1980Fisher's Lane — Philadelphia, Philadelphia County, Pennsylvania
→1997Fissel's School — Shrewsbury Township, York County, Pennsylvania
→1986Fitler School — Philadelphia, Philadelphia County, Pennsylvania
→1988Fitzsimons, Thomas, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1979Flat Car No. 473567 — Strasburg, Lancaster County, Pennsylvania
→1986Fleischer, Helen, Vocational School — Philadelphia, Philadelphia County, Pennsylvania
→1980Fleisher Covered Bridge — Newport, Perry County, Pennsylvania
→1982Fleisher, Samuel S., Art Memorial — Philadelphia, Philadelphia County, Pennsylvania
→1997Fleming, Molly, House — California, Washington County, Pennsylvania
→2002Flight 93 National Memorial — Stonycreek Township, Somerset County, Pennsylvania
→1984Florence Apartments — Scranton, Lackawanna County, Pennsylvania
→1986Follmer, Clogg and Company Umbrella Factory — Lancaster, Lancaster County, Pennsylvania
→1972Fonthill — Doylestown, Bucks County, Pennsylvania
→1985Fonthill, Mercer Museum and Moravian Pottery and Tile Works ★ NHL — Doylestown, Bucks County, Pennsylvania
→1983Foos, Charles S., Elementary School — Reading, Berks County, Pennsylvania
→1989Ford City Armory — Ford City, Armstrong County, Pennsylvania
→2018Ford Motor Company Assembly Plant — Pittsburgh, Allegheny County, Pennsylvania
→1975Ford, James, House — Lawrenceville, Tioga County, Pennsylvania
→1987Fordhook Farm — Doylestown, Bucks County, Pennsylvania
→1982Forest Grove Historic District — Buckingham, Bucks County, Pennsylvania
→1983Forester's Hall — Milford, Pike County, Pennsylvania
→1973Forge Hill — Wawa, Delaware County, Pennsylvania
→1966Forks of the Ohio ★ NHL — Pittsburgh, Allegheny County, Pennsylvania
→1980Forksville Covered Bridge — Forksville, Sullivan County, Pennsylvania
→1972Forrest, Edwin, House — Philadelphia, Philadelphia County, Pennsylvania
→1988Forrest, Edwin, School — Philadelphia, Philadelphia County, Pennsylvania
→1977Forry House — York, York County, Pennsylvania
→1980Forry's Mill Covered Bridge — Columbia, Lancaster County, Pennsylvania
→1979Fort Hunter Historic District — Fort Hunter, Dauphin County, Pennsylvania
→1975Fort Ligonier Site — Ligonier, Westmoreland County, Pennsylvania
→1970Fort Mifflin ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1969Fort Mifflin Hospital — Philadelphia, Philadelphia County, Pennsylvania
→1966Fort Necessity National Battlefield — Uniontown, Fayette County, Pennsylvania
→1986Fort Pitt Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→2022Fort Pittston School — Pittston, Luzerne County, Pennsylvania
→1974Fort Roberdeau — Culp, Blair County, Pennsylvania
→1988Fortieth Street Bridge — Millvale, Allegheny County, Pennsylvania
→1988Forty Fort Meetinghouse — Forty Fort, Luzerne County, Pennsylvania
→1986Foster School — Pittsburgh, Allegheny County, Pennsylvania
→1969Founder's Hall, Girard College ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1988Fountain Hill Historic District — Bethlehem, Lehigh County, Pennsylvania
→1972Fountain House — Doylestown, Bucks County, Pennsylvania
→1985Fourth Avenue Historic District — Pittsburgh, Allegheny County, Pennsylvania
→2013Fourth Avenue Historic District (Boundary Increase) — Pittsburgh, Allegheny County, Pennsylvania
→1979Fowlersville Covered Bridge — Fowlersville, Columbia County, Pennsylvania
→1984Fox Chase Inn — West Whiteland, Chester County, Pennsylvania
→2007Foxburg Country Club and Golf Course — Foxburg, Clarion County, Pennsylvania
→1983Frank, Henry S., Memorial Synagogue — Philadelphia, Philadelphia County, Pennsylvania
→1980Frankenfield Covered Bridge — Point Pleasant, Bucks County, Pennsylvania
→1972Frankford Arsenal — Philadelphia, Philadelphia County, Pennsylvania
→1988Frankford Avenue Bridge — Philadelphia, Philadelphia County, Pennsylvania
→1988Frankford Avenue Bridge — Philadelphia, Philadelphia County, Pennsylvania
→2003Franklin and Marshall College Campus Historic District — Lancaster, Lancaster County, Pennsylvania
→2018Franklin Carpet Mill — Philadelphia, Philadelphia County, Pennsylvania
→1974Franklin County Courthouse — Chambersburg, Franklin County, Pennsylvania
→1970Franklin County Jail — Chambersburg, Franklin County, Pennsylvania
→1991Franklin Furnace Historic District — Edenville, Franklin County, Pennsylvania
→1984Franklin Historic District — Franklin, Venango County, Pennsylvania
→1980Franklin Hose Company No. 28 — Philadelphia, Philadelphia County, Pennsylvania
→1979Franklin Institute — Philadelphia, Philadelphia County, Pennsylvania
→1985Franklin Institute Science Museum — Philadelphia, Philadelphia County, Pennsylvania
→1981Franklin Square — Philadelphia, Philadelphia County, Pennsylvania
→1988Franklin, Benjamin, School — Philadelphia, Philadelphia County, Pennsylvania
→2014Franklinville School — Blue Bell, Montgomery County, Pennsylvania
→2022Frantz School — Kunkletown, Monroe County, Pennsylvania
→1988Frantz's Bridge — Weidasville, Lehigh County, Pennsylvania
→2013Frazier's, Joe, Gym — Philadelphia, Philadelphia County, Pennsylvania
→1971Free Quaker Meetinghouse — Philadelphia, Philadelphia County, Pennsylvania
→1990Frehn Bridge — Springfield, Huntingdon County, Pennsylvania
→1979Freight Locomotive No. 5741 — Strasburg, Lancaster County, Pennsylvania
→1988French Creek Farm — Kimberton, Chester County, Pennsylvania
→1987French Creek State Park Six Penny Day Use District — Morgantown, Berks County, Pennsylvania
→1987French Creek State Park: Organized Group Camp 4 District — Reading, Berks County, Pennsylvania
→2001Frew, John, House — Pittsburgh, Allegheny County, Pennsylvania
→1990Frey, Jacob L., Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1978Frick Building and Annex — Pittsburgh, Allegheny County, Pennsylvania
→1986Frick, Henry Clay, Training School for Teachers — Pittsburgh, Allegheny County, Pennsylvania
→2003Fricks Locks Historic District — Pottstown, Chester County, Pennsylvania
→1990Friedman, Henry B., Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1998Friend, Philip, House — North Bethlehem Township, Washington County, Pennsylvania
→1999Friends Hospital ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2015Friends Housing Cooperative — Philadelphia, Philadelphia County, Pennsylvania
→1996Frost, Josiah, House — New Salem, Fayette County, Pennsylvania
→1983Fullerton Inn — Irwin, Westmoreland County, Pennsylvania
→2002Fulton Building — Pittsburgh, Allegheny County, Pennsylvania
→1986Fulton Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1977Fulton House — McConnellsburg, Fulton County, Pennsylvania
→1975Fulton Log House — Pittsburgh, Allegheny County, Pennsylvania
→1969Fulton Opera House ★ NHL — Lancaster, Lancaster County, Pennsylvania
→1966Fulton, Robert, Birthplace ★ NHL — Quarryville, Lancaster County, Pennsylvania
→1986Fulton, Robert, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Funck, Josiah, Mansion — Lebanon, Lebanon County, Pennsylvania
→2007Funk, Jacob, House and Barn — Springfield, Bucks County, Pennsylvania
→1979Furnace Covered Bridge No. 11 — Esther, Columbia County, Pennsylvania
→2005Furnace Hills Tenant House — West Cocalico Township, Lancaster County, Pennsylvania
→1972Furness Library ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1986Furness, Horace, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1974Gaddis, Thomas, Homestead — Uniontown, Fayette County, Pennsylvania
→1998Gallatin School — Uniontown, Fayette County, Pennsylvania
→1975Gamble Mill — Bellefonte, Centre County, Pennsylvania
→1986GAR Building — Lykens, Dauphin County, Pennsylvania
→1984Garden Court Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1986Garden Court Historic District (Boundary Increase) — Philadelphia, Philadelphia County, Pennsylvania
→1991Gardenville--North Branch Rural Historic District — Gardenville, Bucks County, Pennsylvania
→1974Gardner-Bailey House — Pittsburgh, Allegheny County, Pennsylvania
→2003Garrett Farmstead — Newtown Square, Chester County, Pennsylvania
→1977Gass House — Chambersburg, Franklin County, Pennsylvania
→1977Gatehouse, Laurel Hill Cemetery ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1971Gates, Gen. Horatio, House, and Golden Plough Tavern — York, York County, Pennsylvania
→1985Gauff-Roth House — Allentown, Lehigh County, Pennsylvania
→1983Gay Street School — Phoenixville, Chester County, Pennsylvania
→1992Gehman, John, Farm — Seisholtzville, Berks County, Pennsylvania
→1980Geiger Covered Bridge — Orefield, Lehigh County, Pennsylvania
→1990Geiger Mill — Geigertown, Berks County, Pennsylvania
→1975Gemeinhaus-Lewis David De Schweinitz Residence ★ NHL — Bethlehem, Northampton County, Pennsylvania
→1985General Electric Switchgear Plant — Philadelphia, Philadelphia County, Pennsylvania
→2003General Stores and Mold Loft Building--Harriman Yard of the Merchant Shipbuilding Corporation — Bristol Borough, Bucks County, Pennsylvania
→1979General Washington Inn — Downingtown, Chester County, Pennsylvania
→1976General Wayne Inn — Merion, Montgomery County, Pennsylvania
→1983George, Henry, Birthplace — Philadelphia, Philadelphia County, Pennsylvania
→1975German Evangelical Zion Lutheran Church — Harrisburg, Dauphin County, Pennsylvania
→1992German Society of Pennsylvania — Philadelphia, Philadelphia County, Pennsylvania
→1980Germania Turnverein Building — Lancaster, Lancaster County, Pennsylvania
→1987Germantown Cricket Club ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2022Germantown Fireproof Storage Warehouse — Philadelphia, Philadelphia County, Pennsylvania
→1986Germantown Grammar School — Philadelphia, Philadelphia County, Pennsylvania
→2006Germantown Grammar School (Boundary Increase) — Philadelphia, Philadelphia County, Pennsylvania
→1999Germantown Junction Station — Philadelphia, Philadelphia County, Pennsylvania
→1990Gettysburg Armory — Gettysburg, Adams County, Pennsylvania
→1966Gettysburg National Military Park — Gettysburg, Adams County, Pennsylvania
→1978Gibson House — Jamestown, Mercer County, Pennsylvania
→1980Gibson's Covered Bridge — Downingtown, Chester County, Pennsylvania
→1989Gilbert Bridge — Grantham, Cumberland County, Pennsylvania
→1989Gilbert, Thomas and Lydia, Farm — Holicong, Bucks County, Pennsylvania
→1979Gilfillan Farm — Bridgeville, Allegheny County, Pennsylvania
→1989Gillespie, Elizabeth Duane, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1971Gilpin Homestead — Chadds Ford, Delaware County, Pennsylvania
→1985Girard Avenue Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2011Girard Avenue West Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1974Girard College Complex — Philadelphia, Philadelphia County, Pennsylvania
→1983Girard Group — Philadelphia, Philadelphia County, Pennsylvania
→1992Given, James, Tavern — Carlisle, Cumberland County, Pennsylvania
→2004Givin, Amelia S., Free Library — Mt. Holly Springs, Cumberland County, Pennsylvania
→1985Gladden, Joseph, House — Coatesville, Chester County, Pennsylvania
→1980Gladwyne Historic District — Gladwyne, Montgomery County, Pennsylvania
→1995Glassworks--Core House — Glassworks, Greene County, Pennsylvania
→1995Glassworks--Gabler House — Glassworks, Greene County, Pennsylvania
→1979Glen Foerd at Torresdale — Philadelphia, Philadelphia County, Pennsylvania
→1980Glen Hope Covered Bridge — West Grove, Chester County, Pennsylvania
→1997Glen Rock Historic District — Glen Rock, York County, Pennsylvania
→1985Glen Rose Historic District — Coatesville, Chester County, Pennsylvania
→1977Glenays — Bryn Mawr, Delaware County, Pennsylvania
→1978Glencairn — Bryn Athyn, Montgomery County, Pennsylvania
→2004Glendside Memorial Hall — Cheltenham, Montgomery County, Pennsylvania
→2011Glenmoore Historic District — Wallace, Chester County, Pennsylvania
→1980Glessner Bridge — Shanksville, Somerset County, Pennsylvania
→2003Globe Knitting Mills — Norristown, Montgomery County, Pennsylvania
→1984Globe Ticket Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1980Gloninger Estate — Lebanon, Lebanon County, Pennsylvania
→1966Gloria Dei (Old Swedes') Church National Historic Site — Philadelphia, Philadelphia County, Pennsylvania
→1984Goldsboro Historic District — Goldsboro, York County, Pennsylvania
→1980Good, John B., House — Bowmansville, Lancaster County, Pennsylvania
→1985Goodman Brothers and Hinlein Company — Philadelphia, Philadelphia County, Pennsylvania
→1980Goodwin Acres — West Chester, Chester County, Pennsylvania
→2000Gordon, George W., Farm — Franklin, Greene County, Pennsylvania
→1985Gordon, Jervis, Grist Mill Historic District — Milford, Pike County, Pennsylvania
→2000Goshenville Historic District — East Goshen, Chester County, Pennsylvania
→2015Gosztonyi Savings and Trust — Bethlehem, Northampton County, Pennsylvania
→2018Gotham Silk Hosiery Company — Philadelphia, Philadelphia County, Pennsylvania
→1998Grace Church, Mt. Airy — Philadelphia, Philadelphia County, Pennsylvania
→1966Graeme Park ★ NHL — Horsham, Montgomery County, Pennsylvania
→1980Graff's Market — Indiana, Indiana County, Pennsylvania
→1978Graham and Laird, Schober and Mitchell Factories — Philadelphia, Philadelphia County, Pennsylvania
→1984Grand Army of the Republic Building — Scranton, Lackawanna County, Pennsylvania
→1980Grand Army of the Republic Hall — Johnstown, Cambria County, Pennsylvania
→1992Grand View Dairy Farm — Wernersville, Berks County, Pennsylvania
→1976Grange, The — Haverford, Delaware County, Pennsylvania
→2004Grant, O.B., House — Ridgway Township, Elk County, Pennsylvania
→1989Gratz, Simon, High School — Philadelphia, Philadelphia County, Pennsylvania
→1977Graver's Lane Station — Philadelphia, Philadelphia County, Pennsylvania
→1979Gray-Taylor House — Brookville, Jefferson County, Pennsylvania
→1975Gray, John, House — Port Matilda, Centre County, Pennsylvania
→1988Grays Road Recreation Center — Philadelphia, Philadelphia County, Pennsylvania
→1974Great Conewago Presbyterian Church — Hunterstown, Adams County, Pennsylvania
→1983Great Valley Mill — Paoli, Chester County, Pennsylvania
→2011Green Hill Farms — Lower Merion, Montgomery County, Pennsylvania
→1974Green Hills Farm ★ NHL — Dublin, Bucks County, Pennsylvania
→1980Green Tree Tavern — Philadelphia, Philadelphia County, Pennsylvania
→1985Green Valley Historic District — Newlin & E. Marlborough Twps., Chester County, Pennsylvania
→2010Greenbelt Knoll Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1992Greencastle Historic District — Greencastle, Franklin County, Pennsylvania
→1976Greene Academy — Carmichaels, Greene County, Pennsylvania
→1973Greene Hills Farm — Waynesburg, Greene County, Pennsylvania
→1986Greenfield Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1995Greensboro Historic District — Greensboro, Greene County, Pennsylvania
→1995Greensboro Public School — Greensboro, Greene County, Pennsylvania
→1995Greensburg Downtown Historic District — Greensburg, Westmoreland County, Pennsylvania
→1977Greensburg Railroad Station — Greensburg, Westmoreland County, Pennsylvania
→2000Greenville Commercial Historic District — Greenville, Mercer County, Pennsylvania
→1996Greenwood Farm — Wayne, Chester County, Pennsylvania
→1989Greenwood Furnace — McAlevys Fort, Huntingdon County, Pennsylvania
→1987Greenwood Lake Dam — Belleville, Huntingdon County, Pennsylvania
→1983Greenwood School — West Whiteland, Chester County, Pennsylvania
→1975Greersburg Academy — Darlington, Beaver County, Pennsylvania
→1977Gregg, Andrew, Homestead — Centre Hall, Centre County, Pennsylvania
→1994Gregg, Joseph, House — Kennett Square, Chester County, Pennsylvania
→1981Greisemer's Mill Bridge — Oley, Berks County, Pennsylvania
→1966Grey Towers ★ NHL — Milford, Pike County, Pennsylvania
→1980Grey Towers ★ NHL — Glenside, Montgomery County, Pennsylvania
→1983Grey, Zane, House — Lackawaxen, Pike County, Pennsylvania
→2011Grey, Zane, House (Boundary Increase) — Lackawaxen, Pike County, Pennsylvania
→1990Griesemer--Brown Mill Complex — Birdsboro, Berks County, Pennsylvania
→1999Griest, W.W., Building — Lancaster, Lancaster County, Pennsylvania
→1978Griffey, Benjamin, House — Allenwood, Union County, Pennsylvania
→1976Griffith, William R., House — Harrisburg, Dauphin County, Pennsylvania
→1979Grimes Covered Bridge — Waynesburg, Greene County, Pennsylvania
→1985Grimshaw Silk Mill — Reading, Berks County, Pennsylvania
→1973Gristmiller's House — Bethlehem, Northampton County, Pennsylvania
→1977Gross Bridge — Beavertown, Snyder County, Pennsylvania
→2019Grotto, The-Our Lady of Lourdes Shrine — Nesquehoning, Carbon County, Pennsylvania
→1984Grove Historic District — Downington, Chester County, Pennsylvania
→1983Grove Mansion — Maytown, Lancaster County, Pennsylvania
→1991Grubb Mansion — Pottstown, Montgomery County, Pennsylvania
→1973Grubb, Conrad, Homestead — Schwenksville, Montgomery County, Pennsylvania
→1972Gruber Wagon Works ★ NHL — Reading, Berks County, Pennsylvania
→1972Grumblethorpe — Philadelphia, Philadelphia County, Pennsylvania
→1972Grumblethorpe Tenant House — Philadelphia, Philadelphia County, Pennsylvania
→1986Grundy Mill Complex — Bristol, Bucks County, Pennsylvania
→1980Gudgeonville Covered Bridge — Girard, Erie County, Pennsylvania
→1976Guinston United Presbyterian Church — Laurel, York County, Pennsylvania
→1990Guldin Mill — Blandon, Berks County, Pennsylvania
→1980Guthrie, George W., School — Wilkes-Barre, Luzerne County, Pennsylvania
→1985Gwynedd Hall — Ambler, Montgomery County, Pennsylvania
→1994Habeck, Christian, Farm — Lancaster, Lancaster County, Pennsylvania
→1988Haddington Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2000Hagan, Isaac Newton, House ★ NHL — Chalk Hill (Stewart Township), Fayette County, Pennsylvania
→1979Hager Building — Lancaster, Lancaster County, Pennsylvania
→1990Hain Mill — Wernersville, Berks County, Pennsylvania
→1981Haines Mill — Allentown, Lehigh County, Pennsylvania
→1985Haines, Hanson, House — Philadelphia, Philadelphia County, Pennsylvania
→1996Hair, Matthew, Farm — Hollsopple, Somerset County, Pennsylvania
→2003Hajoca Corporation Headquarters and Showroom — Philadelphia, Philadelphia County, Pennsylvania
→1977Half-Moon Inn — Newtown, Bucks County, Pennsylvania
→1987Halfway Lake Dam — Lewisburg, Union County, Pennsylvania
→1978Hall, Joseph E., House — Brookville, Jefferson County, Pennsylvania
→1973Hall's Bridge — Chester Springs, Chester County, Pennsylvania
→1980Halls Mill Covered Bridge — Hopewell, Bedford County, Pennsylvania
→1991Hamburg Armory — Hamburg, Berks County, Pennsylvania
→2010Hamburg Historic District — Hamburg, Berks County, Pennsylvania
→1988Hamburg Public Library — Hamburg, Berks County, Pennsylvania
→1984Hamilton Apartments — Lancaster, Lancaster County, Pennsylvania
→1979Hamilton Family Estate — Philadelphia, Philadelphia County, Pennsylvania
→2006Hamilton--Ely Farmstead — Whitely Township, Greene County, Pennsylvania
→1980Hamilton, Alexander, House — Waynesboro, Franklin County, Pennsylvania
→1988Hammer Creek Bridge — Brunnerville, Lancaster County, Pennsylvania
→1978Hammersly-Strominger House — Lewisberry, York County, Pennsylvania
→1988Hammerstein, Oscar, II, Farm — Doylestown, Bucks County, Pennsylvania
→2010Hamnett Historic District — Wilkinsburg, Allegheny County, Pennsylvania
→1990Hamorton Historic District — Kennett Square, Chester County, Pennsylvania
→1991Hamot, Pierre S. V., House — Erie, Erie County, Pennsylvania
→1982Hampden Firehouse — Reading, Berks County, Pennsylvania
→1973Hampton Hill — Richboro, Bucks County, Pennsylvania
→1985Hance House and Barn — E. Bradford Twp., Chester County, Pennsylvania
→1976Hand, Gen. Edward, House — Lancaster, Lancaster County, Pennsylvania
→1978Handwrought — Concordville, Delaware County, Pennsylvania
→2002Handycraft Farmstead — Washington, Franklin County, Pennsylvania
→1997Hanging Rock — Upper Marion Township, Montgomery County, Pennsylvania
→1979Hanna Hall — Waynesburg, Greene County, Pennsylvania
→1985Hanna, John, Farm — Coatesville, Chester County, Pennsylvania
→1986Hanna, William B., School — Philadelphia, Philadelphia County, Pennsylvania
→1994Hannastown Farm — Forbes Road, Westmoreland County, Pennsylvania
→1980Hannum, Col. John, House — Marshallton, Chester County, Pennsylvania
→1997Hanover Historic District — Hanover, York County, Pennsylvania
→1983Hanover Junction Railroad Station — Hanover Junction, York County, Pennsylvania
→2014Happy Hollow Recreation Center — Philadelphia, Philadelphia County, Pennsylvania
→2002Harbaugh's Reformed Church — Washington, Franklin County, Pennsylvania
→1990Harbison--Walker Refractories Company — Mount Union, Huntingdon County, Pennsylvania
→1988Harding, Warren G., Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1978Hare's Hill Road Bridge — Phoenixville, Chester County, Pennsylvania
→1980Harewood and Beechwood — Langhorne, Bucks County, Pennsylvania
→1985Harlan House — Embreeville, Chester County, Pennsylvania
→1987Harlan Log House — Kennett Square, Chester County, Pennsylvania
→1979Harmon's Covered Bridge — Willet, Indiana County, Pennsylvania
→1979Harmony Forge Mansion — Milesburg, Centre County, Pennsylvania
→1973Harmony Historic District ★ NHL — Harmony, Butler County, Pennsylvania
→2016Harmony Mennonite Meetinghouse and Cemetery — Jackson Township, Butler County, Pennsylvania
→1999Harnish, Johannes, Farmstead — West Lampeter Township, Lancaster County, Pennsylvania
→1976Harper, Frances Ellen Watkins, House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1987Harriman Historic District — Bristol, Bucks County, Pennsylvania
→1980Harrington Covered Bridge — Albion, Erie County, Pennsylvania
→1983Harrington Machine Shop — Philadelphia, Philadelphia County, Pennsylvania
→2001Harris Building — Philadelphia, Philadelphia County, Pennsylvania
→1994Harris Switch Tower, Pennsylvania Railroad — Harrisbug, Dauphin County, Pennsylvania
→1973Harris, John, Mansion ★ NHL — Harrisburg, Dauphin County, Pennsylvania
→1991Harrisburg 19th Street Armory — Harrisburg, Dauphin County, Pennsylvania
→1990Harrisburg Avenue Tobacco Historic District — Lancaster, Lancaster County, Pennsylvania
→1985Harrisburg Cemetery — Harrisburg, Dauphin County, Pennsylvania
→1975Harrisburg Central Railroad Station and Trainshed ★ NHL — Harrisburg, Dauphin County, Pennsylvania
→1976Harrisburg Historic District — Harrisburg, Dauphin County, Pennsylvania
→1991Harrisburg Military Post — Harrisburg, Dauphin County, Pennsylvania
→2004Harrisburg Polyclinic Hospital — Harrisburg, Dauphin County, Pennsylvania
→1982Harrisburg Technical High School — Harrisburg, Dauphin County, Pennsylvania
→1988Harrison Avenue Bridge — Scranton, Lackawanna County, Pennsylvania
→1974Harrison House — Centerville, Washington County, Pennsylvania
→1988Harrison, William H., School — Philadelphia, Philadelphia County, Pennsylvania
→1985Harriton — Villanova, Montgomery County, Pennsylvania
→1984Hart Building — Williamsport, Lycoming County, Pennsylvania
→1983Hartley-Rose Belting Company Building — Pittsburgh, Allegheny County, Pennsylvania
→1988Hartman Cider Press — Lobachsville, Berks County, Pennsylvania
→1976Hartman, George, House — Phoenixville, Chester County, Pennsylvania
→1972Harvard, David, House — Valley Forge, Chester County, Pennsylvania
→1985Harvey, Nathan, House — Mill Hall, Clinton County, Pennsylvania
→1978Harvey, Peter, House and Barn — Kennett Square, Chester County, Pennsylvania
→1971Harvey, William, House — Chadds Ford, Chester County, Pennsylvania
→1980Hassenplug Bridge — Mifflinburg, Union County, Pennsylvania
→2016Hatfield Borough Substation, Lock Up and Firehouse — Hatfield Borough, Montgomery County, Pennsylvania
→1972Hatfield House — Philadelphia, Philadelphia County, Pennsylvania
→1984Hatfield-Hibernia Historic District — Wagontown, Chester County, Pennsylvania
→1986Hawthorne School — Canonsburg, Washington County, Pennsylvania
→1986Hawthorne, Nathaniel, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Hayes Bridge — Mifflinburg, Union County, Pennsylvania
→1985Hayes Homestead — Newlin Twp., Chester County, Pennsylvania
→1985Hayes Mill House — Newlin Twp., Chester County, Pennsylvania
→1985Hayes, Jacob, House — Newlin Twp., Chester County, Pennsylvania
→1974Hayhurst Farm — Wrightstown, Bucks County, Pennsylvania
→1978Hays Bridge Historic District — Mercersburg, Franklin County, Pennsylvania
→1976Hazeltine, A. J., House — Warren, Warren County, Pennsylvania
→2012Hazelton High School — Hazelton, Luzerne County, Pennsylvania
→2020Hazelwood Brewing Company — Pittsburgh, Allegheny County, Pennsylvania
→1972Head House Square — Philadelphia, Philadelphia County, Pennsylvania
→1991Heasley, Charles Grant, House — Waynesburg, Greene County, Pennsylvania
→1974Heathside Cottage — Pittsburgh, Allegheny County, Pennsylvania
→1980Heikes Covered Bridge — Heidlersburg, Adams County, Pennsylvania
→2019Heinz, H.J., Company — Pittsburgh, Allegheny County, Pennsylvania
→1980Heirline Covered Bridge — Manns Choice, Bedford County, Pennsylvania
→1972Heisey House — Lock Haven, Clinton County, Pennsylvania
→2022Heishman Mill — West Pennsboro Township, Cumberland County, Pennsylvania
→1979Heiss, William A., House and Buggy Shop — Mifflinburg, Union County, Pennsylvania
→1977Helfrich's Springs Grist Mill — Fullerton, Lehigh County, Pennsylvania
→1999Helfrich's Springs Grist Mill (Boundary Increase) — Whitehall Township, Lehigh County, Pennsylvania
→2001Heller, George K., School — Ashmead Village, Montgomery County, Pennsylvania
→2010Heller, Michael and Margaret, House — Lower Saucon, Northampton County, Pennsylvania
→1982Heller, William Jacob, House — Easton, Northampton County, Pennsylvania
→1979Hendel Brothers, Sons and Company Hat Factory — Reading, Berks County, Pennsylvania
→1979Henderson-Metz House — Pittsburgh, Allegheny County, Pennsylvania
→1979Henderson, Dr. William, House — Hummelstown, Dauphin County, Pennsylvania
→1978Henniger Farm Covered Bridge — Elizabethville, Dauphin County, Pennsylvania
→1979Henry Covered Bridge — Monongahela, Washington County, Pennsylvania
→2021Henry Whitaker’s Sons’ Mill — Philadelphia, Philadelphia County, Pennsylvania
→1988Henry, Charles Wolcott, School — Philadelphia, Philadelphia County, Pennsylvania
→1978Herdic, Peter, House — Williamsport, Lycoming County, Pennsylvania
→2004Herpel Brothers Foundry and Machine Shop — Reynoldsville, Jefferson County, Pennsylvania
→1994Herr, Christian and Emma, Farm — Lancaster, Lancaster County, Pennsylvania
→1971Herr, Hans, House — Lancaster, Lancaster County, Pennsylvania
→1980Herr's Mill Covered Bridge — Soundersbury, Lancaster County, Pennsylvania
→1980Hershey Community Center Building — Hershey, Dauphin County, Pennsylvania
→1978Hershey, Milton S., Mansion ★ NHL — Hershey, Dauphin County, Pennsylvania
→1982Hess, A. B., Cigar Factory, and Warehouses — Lancaster, Lancaster County, Pennsylvania
→1974Hessian Powder Magazine — Carlisle, Cumberland County, Pennsylvania
→1980Hewitt Covered Bridge — Hewitt, Bedford County, Pennsylvania
→1984Heywood Chair Factory — Philadelphia, Philadelphia County, Pennsylvania
→1975Hibernia House — Wagontown, Chester County, Pennsylvania
→1980Hibshman Farm — Ephrata, Lancaster County, Pennsylvania
→1976High Bridge — Coatesville, Chester County, Pennsylvania
→1983High German Evangelical Reformed Church — Allentown, Lehigh County, Pennsylvania
→1986High Hill Farm — Concordville, Delaware County, Pennsylvania
→1992High Street Historic District — Pottstown, Montgomery County, Pennsylvania
→1991Highland Building — Pittsburgh, Allegheny County, Pennsylvania
→1978Highland Hall — Hollidaysburg, Blair County, Pennsylvania
→2007Highland Park Residential Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1976Highland Towers Apartments — Pittsburgh, Allegheny County, Pennsylvania
→1976Highlands, The — Fort Washington, Montgomery County, Pennsylvania
→1990Highspire High School — Highspire, Dauphin County, Pennsylvania
→1977Hill House — Boalsburg, Centre County, Pennsylvania
→1971Hill-Physick House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1979Hill, John, House — Erie, Erie County, Pennsylvania
→1974Hill's Sawmill — Equinunk, Wayne County, Pennsylvania
→1974Hill's Tavern — Scenery Hill, Washington County, Pennsylvania
→1973Hillsgrove Covered Bridge — Hillsgrove, Sullivan County, Pennsylvania
→1979Himmel's Church Covered Bridge — Rebuck, Northumberland County, Pennsylvania
→2012Historic Moravian Bethlehem Historic District ★ NHL — Bethlehem, Northampton County, Pennsylvania
→1998Hite House — Stoystown Borough, Somerset County, Pennsylvania
→1990Hockley Mill Farm — Glen Moore, Chester County, Pennsylvania
→1983Hockley Row — Philadelphia, Philadelphia County, Pennsylvania
→1984Hoene-Werle House — Pittsburgh, Allegheny County, Pennsylvania
→1984Hoffman, George, House — West Whiteland, Chester County, Pennsylvania
→1988Hogback Bridge — Curwensville, Clearfield County, Pennsylvania
→1986Hogue, Robert M., House — Philadelphia, Philadelphia County, Pennsylvania
→1980Holicong Village Historic District — Holicong, Bucks County, Pennsylvania
→1985Hollidaysburg Historic District — Hollidaysburg, Blair County, Pennsylvania
→1979Hollingshead Covered Bridge No. 40 — Catawissa, Columbia County, Pennsylvania
→1984Holman, A. J., and Company — Philadelphia, Philadelphia County, Pennsylvania
→1988Holme Avenue Bridge — Philadelphia, Philadelphia County, Pennsylvania
→1988Holmes Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1995Holmes-Foster--Highlands Historic District — State College, Centre County, Pennsylvania
→1986Homestead High-Level Bridge — Pittsburgh, Allegheny County, Pennsylvania
→1990Homestead Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1985Homestead Pennsylvania Railroad Station — Homestead, Allegheny County, Pennsylvania
→1998Honesdale Residential Historic District — Honesdale, Wayne County, Pennsylvania
→2006Hood Octagonal School — Newtown Township, Delaware County, Pennsylvania
→1985Hoopes, Cyrus, House and Barn — W. Marlborough Township, Chester County, Pennsylvania
→1972Hope Lodge — Fort Washington, Montgomery County, Pennsylvania
→2010Hopewell Farm — Valley, Chester County, Pennsylvania
→1966Hopewell Furnace National Historic Site — Elverson, Berks County, Pennsylvania
→1991Hopewell Historic District — Hopewell, Chester County, Pennsylvania
→1988Hopkinson, Francis, School — Philadelphia, Philadelphia County, Pennsylvania
→1979Hopper-Snyder Homestead — Watsontown, Northumberland County, Pennsylvania
→1995Hopwood--Miller Tavern — Hopwood, Fayette County, Pennsylvania
→1986Horn, George L., School — Philadelphia, Philadelphia County, Pennsylvania
→2008Hornby School — Greenfield, Erie County, Pennsylvania
→2007Horner House and Barn — Cumberland Township, Adams County, Pennsylvania
→1988Horse Valley Bridge — Upper Strasburg, Franklin County, Pennsylvania
→1966Horseshoe Curve ★ NHL — Altoona, Blair County, Pennsylvania
→1991Horsham Friends Meeting — Horsham, Montgomery County, Pennsylvania
→1988Horsham--Montgomery Bridge — Fort Washington, Montgomery County, Pennsylvania
→2017Hotel Abraham Lincoln — Reading, Berks County, Pennsylvania
→2014Hotel Altamont — Hazelton, Luzerne County, Pennsylvania
→1980Hotel Fauchere and Annex — Milford, Pike County, Pennsylvania
→2016Hotel Lykens — Lykens, Dauphin County, Pennsylvania
→2012Hotel Pennsylvania — Philadelphia, Philadelphia County, Pennsylvania
→1984Hotel Sterling — Allentown, Lehigh County, Pennsylvania
→1972Hottenstein Mansion — Kutztown, Berks County, Pennsylvania
→1992Hough, John and Phineas, House — Yardley, Bucks County, Pennsylvania
→1986House at 200 West North Avenue — Pittsburgh, Allegheny County, Pennsylvania
→1985House at Springdell — W. Marlborough Twp., Chester County, Pennsylvania
→1985House at Upper Laurel Iron Works — Newlin Twp., Chester County, Pennsylvania
→1973House of Miller at Millbach — Newmanstown, Lebanon County, Pennsylvania
→2007Houseknecht Farm — Moreland, Lycoming County, Pennsylvania
→1994Houses at 1907--1951 N. 32nd St. — Philadelphia, Philadelphia County, Pennsylvania
→1982Houses at 2000-2018 Delancey Street — Philadelphia, Philadelphia County, Pennsylvania
→1984Houses at 2501-2531 Charles Street — Pittsburgh, Allegheny County, Pennsylvania
→1984Houses at 838-862 Brightridge Street — Pittsburgh, Allegheny County, Pennsylvania
→1989Houston, Henry H., School — Philadelphia, Philadelphia County, Pennsylvania
→1971Hovenden House, Barn and Abolition Hall — Plymouth Meeting, Montgomery County, Pennsylvania
→1995Howard Tunnel, Northern Central Railway — New Salem, York County, Pennsylvania
→1988Howe, Julia Ward, School — Philadelphia, Philadelphia County, Pennsylvania
→2017Howell and Brothers Paper Hangings Manufactory — Philadelphia, Philadelphia County, Pennsylvania
→1972Howell House — Philadelphia, Philadelphia County, Pennsylvania
→1979Hower-Slote House — Turbotville, Northumberland County, Pennsylvania
→2022Hoyle, Harrison & Kaye Textile Mill — Philadelphia, Philadelphia County, Pennsylvania
→1990Hudson Grist Mill — Saltillo, Huntingdon County, Pennsylvania
→1992Huffman Distillery and Chopping Mill — Cokeburg, Washington County, Pennsylvania
→1979Hughes Covered Bridge — Prosperity, Washington County, Pennsylvania
→1972Hughes House — Jefferson, Greene County, Pennsylvania
→1986Hulmeville Historic District — Hulmeville, Bucks County, Pennsylvania
→2019Humane Fire Engine Company No. 1 — Royersford, Montgomery County, Pennsylvania
→2000Hunsberger, Isaac, House — Limerick Twp., Montgomery County, Pennsylvania
→1991Hunt Armory — Pittsburgh, Allegheny County, Pennsylvania
→1980Hunt, Roger, Mill — Downingtown, Chester County, Pennsylvania
→2021Hunter Saw & Machine Company — Pittsburgh, Allegheny County, Pennsylvania
→1988Hunter's Mill Complex — Herreford Twnshp., Berks County, Pennsylvania
→1979Hunterstown Historic District — Hunterstown, Adams County, Pennsylvania
→1989Huntingdon Armory — Huntingdon, Huntingdon County, Pennsylvania
→1986Huntingdon Borough Historic District — Huntingdon, Huntingdon County, Pennsylvania
→1990Huntingdon Furnace — Franklinville, Huntingdon County, Pennsylvania
→1977Huston, Abram, House and Carriage House — Coatesville, Chester County, Pennsylvania
→1986Hutchinson Farm — Elizabeth, Allegheny County, Pennsylvania
→2023Hyson Schools Historic District — East Hopewell Township, York County, Pennsylvania
→1977Iddings-Baldridge House — Milesburg, Centre County, Pennsylvania
→2013Idlewild — Media, Delaware County, Pennsylvania
→1984Idlewild Farm Complex — Bryn Mawr, Montgomery County, Pennsylvania
→2005Illick's Mill — Bethlehem, Northampton County, Pennsylvania
→2022Immel, John, House — Myerstown, Lebanon County, Pennsylvania
→1966Independence National Historical Park — Philadelphia, Philadelphia County, Pennsylvania
→1978Independent Congregational Church — Meadville, Crawford County, Pennsylvania
→1985Indian Deep Farm — Newlin Twp., Chester County, Pennsylvania
→1990Indian Steps Cabin — Airville, York County, Pennsylvania
→1991Indiana Armory — Indiana, Indiana County, Pennsylvania
→1983Indiana Borough 1912 Municipal Building — Indiana, Indiana County, Pennsylvania
→1986Institute for Colored Youth — Philadelphia, Philadelphia County, Pennsylvania
→1966Institute of the Pennsylvania Hospital ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1978Insurance Company of North America Building ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1982Integrity Title Insurance, Trust and Safe Deposit Company — Philadelphia, Philadelphia County, Pennsylvania
→2018International Harvester Company Building-Philadelphia Branch House — Philadelphia, Philadelphia County, Pennsylvania
→2021International Harvester Company of America: Pittsburgh Branch House — Pittsburgh, Allegheny County, Pennsylvania
→1972Irish, Nathaniel, House — Philadelphia, Philadelphia County, Pennsylvania
→1988Ironstone Bridge — Morysville, Berks County, Pennsylvania
→1979Irvin-Patchin House — Burnside, Clearfield County, Pennsylvania
→1976Irvine United Presbyterian Church — Irvine, Warren County, Pennsylvania
→1978Irvine, Guy C., House — Russell, Warren County, Pennsylvania
→1983Irving Female College — Mechanicsburg, Cumberland County, Pennsylvania
→2012Irwinton Historic District — Upton, Franklin County, Pennsylvania
→1991Isabella Furnace — Brandywine Manor, Chester County, Pennsylvania
→1997Isett, Jacob, House and Store — Arch Spring, Blair County, Pennsylvania
→2016Israel Building — Lykens, Dauphin County, Pennsylvania
→2018Ivy Cottage — Exton, Chester County, Pennsylvania
→1972Ivy Lodge — Philadelphia, Philadelphia County, Pennsylvania
→1972Ivy Mills Historic District — Concord Township, Delaware County, Pennsylvania
→2002Ivyland Historic District — Ivyland, Bucks County, Pennsylvania
→1980Jacks Mountain Covered Bridge — Iron Springs, Adams County, Pennsylvania
→1985Jackson Mansion and Carriage House — Berwick, Columbia County, Pennsylvania
→1979Jackson's Mill Covered Bridge — Burgettstown, Washington County, Pennsylvania
→1980Jacksons Mill Covered Bridge — Bedford, Bedford County, Pennsylvania
→1984Jacobs, Benjamin, House — West Whiteland, Chester County, Pennsylvania
→1977Jacobsburg Historic District — Nazareth, Northampton County, Pennsylvania
→1972James-Lorah House — Doylestown, Bucks County, Pennsylvania
→1977James, Morgan, Homestead — New Britain, Bucks County, Pennsylvania
→1982Jayne, Horace, House — Philadelphia, Philadelphia County, Pennsylvania
→1985Jefferson Avenue School — Bristol, Bucks County, Pennsylvania
→2003Jefferson Elementary School — Pottstown, Montgomery County, Pennsylvania
→1987Jefferson Land Association Historic District — Bristol, Bucks County, Pennsylvania
→1985Jefferson Theater — Punxsutawney, Jefferson County, Pennsylvania
→1988Jefferson, Thomas, School — Philadelphia, Philadelphia County, Pennsylvania
→1985Jefferson. John P., House — Warren, Warren County, Pennsylvania
→1977Jenkins Homestead — Lansdale, Montgomery County, Pennsylvania
→1979Jenkins' Town Lyceum Building — Jenkintown, Montgomery County, Pennsylvania
→2014Jenkintown Wyncote Train Station — Jenkintown and Cheltenham Township, Montgomery County, Pennsylvania
→1988Jenks, John Story, School — Philadelphia, Philadelphia County, Pennsylvania
→1996Jennings--Gallagher House — California, Washington County, Pennsylvania
→1988Jerome Street Bridge — Glassport, Allegheny County, Pennsylvania
→1975Jersey Shore Historic District — Jersey Shore, Lycoming County, Pennsylvania
→1980Joanna Furnace Complex — Morgantown, Berks County, Pennsylvania
→1974John's Burnt Mill Bridge — New Oxford, Adams County, Pennsylvania
→1979Johnson Covered Bridge No. 28 — Catawissa, Columbia County, Pennsylvania
→1995Johnson--Hatfield Tavern — Brier Hill, Fayette County, Pennsylvania
→1972Johnson, John, House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1990Johnson, Nicholas, Mill — New Berlinville, Berks County, Pennsylvania
→1999Johnsonburg Commercial Historic District — Johnsonburg, Elk County, Pennsylvania
→1972Johnston's Tavern — Mercer, Mercer County, Pennsylvania
→1966Johnstown Flood National Memorial — Johnstown, Cambria County, Pennsylvania
→1973Johnstown Inclined Railway — Johnstown, Cambria County, Pennsylvania
→1978Jones, B. F., Memorial Library — Aliquippa, Beaver County, Pennsylvania
→1995Jones, Benjamin F., Cottage — Cresson, Cambria County, Pennsylvania
→1995Jones, James, House — Greensboro, Greene County, Pennsylvania
→1988Jones, John Paul, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1979Josiah Hess Covered Bridge No. 122 — Forks, Columbia County, Pennsylvania
→1979Jud Christie Covered Bridge No. 95 — Millville, Columbia County, Pennsylvania
→1990Juniata Iron Works — Alexandria, Huntingdon County, Pennsylvania
→1983Juniata Woolen Mill and Newry Manor — Everett, Bedford County, Pennsylvania
→2014Juvenile and Domestic Branches of the Municipal Court — Philadelphia, Philadelphia County, Pennsylvania
→1988Kagerise Store and House — Adamstown, Lancaster County, Pennsylvania
→2017Kahn, Harry C. and Son, Warehouse — Philadelphia, Philadelphia County, Pennsylvania
→1991Kane Armory — Kane, McKean County, Pennsylvania
→1978Kane, Thomas L., Memorial Chapel — Kane, McKean County, Pennsylvania
→1997Karolcik Building — Perryopolis, Fayette County, Pennsylvania
→1996Kastner, Jacob, Loghouse — Spring House, Montgomery County, Pennsylvania
→1990Kauffman Mill — Shartlesville, Berks County, Pennsylvania
→1980Kaufman's Distillery Covered Bridge — Manheim, Lancaster County, Pennsylvania
→1997Kaufmann's Department Store Warehouse — Pittsburgh, Allegheny County, Pennsylvania
→2008Keefe-Mumbower Mill — North Wales, Montgomery County, Pennsylvania
→1979Keefer Covered Bridge No. 7 — Washingtonville, Montour County, Pennsylvania
→1979Keefer Station Covered Bridge — Sunbury, Northumberland County, Pennsylvania
→1974Keim Homestead — Lobachsville, Berks County, Pennsylvania
→1978Keith House--Washington's Headquarters — Pineville, Bucks County, Pennsylvania
→2011Keith, D.S., Junior High School — Altoona, Blair County, Pennsylvania
→1986Keller, Jacob, Farm — Ephrata, Lancaster County, Pennsylvania
→1980Keller's Covered Bridge — Ephrata, Lancaster County, Pennsylvania
→1980Kelly, Amos, House — Cambridge Springs, Crawford County, Pennsylvania
→1977Kemmerer House — Emmaus, Lehigh County, Pennsylvania
→1978Kemp's Hotel — Kutztown, Berks County, Pennsylvania
→1992Kenderdine Mill Complex — Horsham, Montgomery County, Pennsylvania
→1974Kennedy Bridge — Kimberton, Chester County, Pennsylvania
→1983Kennedy Mansion — Port Kennedy, Montgomery County, Pennsylvania
→1984Kennedy, Francis W., House — West Whiteland, Chester County, Pennsylvania
→2009Kennedy, Robert, Memorial Presbyterian Church — Montgomery, Franklin County, Pennsylvania
→1989Kennett Square Historic District — Kennett Square, Chester County, Pennsylvania
→1987Kennywood Park ★ NHL — West Mifflin, Allegheny County, Pennsylvania
→1990Kensington Branch of the Philadelphia YWCA — Philadelphia, Philadelphia County, Pennsylvania
→1988Kensington High School for Girls — Philadelphia, Philadelphia County, Pennsylvania
→2000Kent, Thomas, Jr., Farm — Waynersburg, Greene County, Pennsylvania
→2003Ker--Feal — West Pikeland Township, Chester County, Pennsylvania
→2003Kerr, Thomas R., Dr., House and Office — Oakmont, Allegheny County, Pennsylvania
→1983Keswick Theatre — Glenside, Montgomery County, Pennsylvania
→1986Key, Francis Scott, School — Philadelphia, Philadelphia County, Pennsylvania
→1979Keystone Building — Harrisburg, Dauphin County, Pennsylvania
→1985Keystone Hook and Ladder Company — Reading, Berks County, Pennsylvania
→1985Keystone Hotel — Hummelstown, Dauphin County, Pennsylvania
→1974Kidd's Mills Covered Bridge Historic District — Greenville, Mercer County, Pennsylvania
→1987Kimberton Historic District (Boundary Increase) — Kimberton, Chester County, Pennsylvania
→1976Kimberton Village Historic District — Kimberton, Chester County, Pennsylvania
→1984Kinbawn — West Whiteland, Chester County, Pennsylvania
→1986Kinder's Mill — Deemston, Washington County, Pennsylvania
→1979King Covered Bridge — Kuhntown, Greene County, Pennsylvania
→1975King of Prussia Inn — King of Prussia, Montgomery County, Pennsylvania
→1980King's Bridge — Somerset, Somerset County, Pennsylvania
→1989Kingston Armory — Wilkes-Barre, Luzerne County, Pennsylvania
→1983Kingston House — Youngstown, Westmoreland County, Pennsylvania
→1986Kinsey, John L., School — Philadelphia, Philadelphia County, Pennsylvania
→1979Kintersburg Covered Bridge — Kintersburg, Indiana County, Pennsylvania
→1983Kirk Johnson Building — Lancaster, Lancaster County, Pennsylvania
→1980Kirk, William, House — Turbotville, Northumberland County, Pennsylvania
→1988Kirkbride, Eliza Butler, School — Philadelphia, Philadelphia County, Pennsylvania
→1983Kirkland Station — West Whiteland, Chester County, Pennsylvania
→1978Kirks Mills Historic District — Nottingham, Lancaster County, Pennsylvania
→1988Kise Mill Bridge — Woodside, York County, Pennsylvania
→1992Kissling Farm — Robesonia, Berks County, Pennsylvania
→2021Kistler Residence — Allentown, Lehigh County, Pennsylvania
→1985Kitchen, William, House — New Hope, Bucks County, Pennsylvania
→1984Kitson Woolen Mill — Stroudsburg, Monroe County, Pennsylvania
→1973Klein Meetinghouse — Harleysville, Montgomery County, Pennsylvania
→1990Knabb--Bieber Mill — Stony Creek Mills, Berks County, Pennsylvania
→1976Knapp Farm — Montgomeryville, Montgomery County, Pennsylvania
→2018Knapp, Joseph, Hotel and Store — Clover Township, Jefferson County, Pennsylvania
→1980Knapp's Covered Bridge — Burlington, Bradford County, Pennsylvania
→1985Knauer, John, House and Mill — Knauertown, Chester County, Pennsylvania
→2008Knauss, Heinrich, House — Emmaus, Lehigh County, Pennsylvania
→1980Knecht's Mill Covered Bridge — Springtown, Bucks County, Pennsylvania
→2002Knickerbocker Historic District — Altoona, Blair County, Pennsylvania
→2000Knipe--Johnson Farm — Upper Gywnedd Township, Montgomery County, Pennsylvania
→2003Knipe--Moore--Rupp Farm — Upper Gwynedd Township, Montgomery County, Pennsylvania
→1980Knisley, Dr., Covered Bridge — Alum Bank, Bedford County, Pennsylvania
→1979Knoebel, Lawrence L., Covered Bridge — Knoebel's Grove, Northumberland County, Pennsylvania
→1992Knorr--Bare Farm — Sinking Spring, Berks County, Pennsylvania
→1974Knowlton — Philadelphia, Philadelphia County, Pennsylvania
→1987Knoxville Junior High School — Pittsburgh, Allegheny County, Pennsylvania
→1974Knurr Log House — Delphi, Montgomery County, Pennsylvania
→1980Kochendefer Covered Bridge — Saville, Perry County, Pennsylvania
→1982Koehler, Jackson, Eagle Brewery — Erie, Erie County, Pennsylvania
→2023Koerner, Henry, House — Pittsburgh, Allegheny County, Pennsylvania
→1973Kolb, Dielman, Homestead — Lederach, Montgomery County, Pennsylvania
→1987Kooser State Park Family Cabin District — Jefferson, Somerset County, Pennsylvania
→1979Kramer Covered Bridge No. 113 — Rohrsburg, Columbia County, Pennsylvania
→1982Krauskap, Henry, House, and Store — Lancaster, Lancaster County, Pennsylvania
→1980Kreider Shoe Manufacturing Company — Elizabethtown, Lancaster County, Pennsylvania
→1980Kreiderville Covered Bridge — Kreiderville, Northampton County, Pennsylvania
→1979Kreigbaum Covered Bridge — Elysburg, Northumberland County, Pennsylvania
→1979Krepps Covered Bridge — Midway, Washington County, Pennsylvania
→1999Kulp, Isaac, Farm — Upper Gwynedd Township, Montgomery County, Pennsylvania
→1982Kunkel Building — Harrisburg, Dauphin County, Pennsylvania
→1988Kurtz, T. M., House — Punxsutawney, Jefferson County, Pennsylvania
→1971Kuster Mill — Collegeville, Montgomery County, Pennsylvania
→1990Kutz Mill — Kutztown, Berks County, Pennsylvania
→1981Kutz's Mill Bridge — Kutztown, Berks County, Pennsylvania
→1980Kutztown 1892 Public School Building — Kutztown, Berks County, Pennsylvania
→1985La Blanche Apartments — Philadelphia, Philadelphia County, Pennsylvania
→1979Lacawac — Ledgedale, Wayne County, Pennsylvania
→1980Lacey, Gen. John, Homestead — Wycombe, Bucks County, Pennsylvania
→1983Lackawanna Avenue Commercial Historic District — Scranton, Lackawanna County, Pennsylvania
→1997Lackawanna County Courthouse and John Mitchell Monument — Scranton, Lackawanna County, Pennsylvania
→1991Lackawanna Iron and Coal Company Furnace — Scranton, Lackawanna County, Pennsylvania
→1982Lady Washington Inn — Huntingdon Valley, Montgomery County, Pennsylvania
→1974Lafayette's Quarters — Valley Forge, Chester County, Pennsylvania
→1979Lahr Farm — Elverson, Chester County, Pennsylvania
→1980Lairdsville Covered Bridge — Hughesville, Lycoming County, Pennsylvania
→2008Lake City School — Lake City, Elk County, Pennsylvania
→1991Lancaster Armory — Lancaster, Lancaster County, Pennsylvania
→2019Lancaster City Historic District — Lancaster, Lancaster County, Pennsylvania
→1978Lancaster County Courthouse — Lancaster, Lancaster County, Pennsylvania
→1980Lancaster County House of Employment — Lancaster, Lancaster County, Pennsylvania
→1983Lancaster Crematorium — Lancaster, Lancaster County, Pennsylvania
→1979Lancaster Historic District — Lancaster, Lancaster County, Pennsylvania
→1984Lancaster Historic District (Boundary Increase II) — Lancaster, Lancaster County, Pennsylvania
→1983Lancaster Historic District (Boundary Increase) — Lancaster, Lancaster County, Pennsylvania
→1983Lancaster Trust Company — Lancaster, Lancaster County, Pennsylvania
→1982Lancaster Watch Company — Lancaster, Lancaster County, Pennsylvania
→1978Land Title Building — Philadelphia, Philadelphia County, Pennsylvania
→1973Landis Homestead — Tylersport, Montgomery County, Pennsylvania
→1980Landis Mill Covered Bridge — Lancaster, Lancaster County, Pennsylvania
→1980Landis Shoe Company Building — Palmyra, Lebanon County, Pennsylvania
→2000Landis Valley Museum — Landis Valley, Lancaster County, Pennsylvania
→1986Landreth, David, School — Philadelphia, Philadelphia County, Pennsylvania
→1972Lane House — Mercersburg, Franklin County, Pennsylvania
→1987Langhorne Historic District — Langhorne, Bucks County, Pennsylvania
→1986Langhorne Library — Langhorne, Bucks County, Pennsylvania
→2008Langhorne Manor School — Langhorne Manor, Bucks County, Pennsylvania
→1986Langley High School — Pittsburgh, Allegheny County, Pennsylvania
→2004Lansdale Silk Hosiery Compy--Interstate Hosiery Mills, Inc. — Lansdale, Montgomery County, Pennsylvania
→1987Lansdowne Park Historic District — Lansdowne, Delaware County, Pennsylvania
→1987Lansdowne Theatre — Lansdowne, Delaware County, Pennsylvania
→2012Lansford Historic District — Lansford, Carbon County, Pennsylvania
→1980Lapp Log House — Chester Springs, Chester County, Pennsylvania
→1986Larimer School — Pittsburgh, Allegheny County, Pennsylvania
→1980Larkin Covered Bridge — Downingtown, Chester County, Pennsylvania
→2003Larkin--Belber Building — Philadelphia, Philadelphia County, Pennsylvania
→1986Latimer School — Pittsburgh, Allegheny County, Pennsylvania
→1989Latrobe Armory — Latrobe, Westmoreland County, Pennsylvania
→1987Laughlin, Hugh, House — Brownsville, Fayette County, Pennsylvania
→1975Laurel Hill Furnace — New Florence, Westmoreland County, Pennsylvania
→1987Laurel Hill RDA — Somerset, Somerset County, Pennsylvania
→1976Laurel-Rex Fire Company House — York, York County, Pennsylvania
→1988Lawndale School — Philadelphia, Philadelphia County, Pennsylvania
→1978Lawrence County Courthouse — New Castle, Lawrence County, Pennsylvania
→1986Lawrence Public School — Pittsburgh, Allegheny County, Pennsylvania
→1988Layton Bridge — Layton, Fayette County, Pennsylvania
→1972Lazaretto, The — Essington, Delaware County, Pennsylvania
→1988Lea, Henry C., School of Practice — Philadelphia, Philadelphia County, Pennsylvania
→2021Leader Theater — Philadelphia, Philadelphia County, Pennsylvania
→1980Leaman Place Covered Bridge — Intercourse, Lancaster County, Pennsylvania
→1991Leap-the-Dips ★ NHL — Altoona, Blair County, Pennsylvania
→1984Leas, Benjamin B., House — Shirleysburg, Huntingdon County, Pennsylvania
→2004Leaser, Frederick and Catherine, Farm — Lynn Township, Lehigh County, Pennsylvania
→1979Leatherman Covered Bridge — Cokeburg, Washington County, Pennsylvania
→2013Lebanon Veterans Administration Hospital Historic District — South Lebanon, Lebanon County, Pennsylvania
→1984Lee Tire and Rubber Company — Conshohocken, Montgomery County, Pennsylvania
→1976Leedom, David, Farm — Newtown, Bucks County, Pennsylvania
→1977Leesport Lock House — Leesport, Berks County, Pennsylvania
→2007Legislative Route 1 Sycamore Allee — Halifax and Reed, Dauphin County, Pennsylvania
→1978Lehigh Canal — Walnutport, Northampton County, Pennsylvania
→1980Lehigh Canal — Allentown and vicinity, Lehigh County, Pennsylvania
→1979Lehigh Canal; Allentown to Hopeville Section — Bethlehem and, Northampton County, Pennsylvania
→1978Lehigh Canal: Eastern Section Glendon and Abbott Street Industrial Sites — Easton, Northampton County, Pennsylvania
→1984Lehigh Valley Railroad Headquarters Building — Bethlehem, Northampton County, Pennsylvania
→1993Lehigh Valley Silk Mills — Fountain Hill, Northampton County, Pennsylvania
→2023Lehigh Valley Transit Station — Perkasie, Bucks County, Pennsylvania
→2021Lehigh Water Gap Chain Bridge Toll House and East Bridge Abutment — Lehigh Township, Northampton County, Pennsylvania
→1979Lehman's, Port Royal Covered Bridge — Port Royal, Juniata County, Pennsylvania
→1992Leiby, Jacob, Farm — Virginville, Berks County, Pennsylvania
→1980Leidy, Dr. Joseph, House — Philadelphia, Philadelphia County, Pennsylvania
→1970Leiper, Thomas, Estate — Wallingford, Delaware County, Pennsylvania
→1986Lemington Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1979Lemont Historic District — Lemont, Centre County, Pennsylvania
→1996LeMoyne Crematory — Washington, Washington County, Pennsylvania
→1973Lemoyne, Dr. Julius, House — Washington, Washington County, Pennsylvania
→1997LeMoyne, F. Julius, House ★ NHL — Washington, Washington County, Pennsylvania
→1988Lenape Bridge — Lenape, Chester County, Pennsylvania
→1978Lenhart Farm — Lenhartsville, Berks County, Pennsylvania
→1979Lerch Tavern — Wernersville, Berks County, Pennsylvania
→1994Lesley, J. Peter, House ★ NHL — Phialdelphia, Philadelphia County, Pennsylvania
→1986Letsche Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1978Levan Farm — St. Lawrence, Berks County, Pennsylvania
→1988Levering, William, School — Philadelphia, Philadelphia County, Pennsylvania
→1984Lewis, Evan, House — Exton, Chester County, Pennsylvania
→1991Lewisburg Armory — Lewisburg, Union County, Pennsylvania
→2004Lewisburg Historic District — Lewisburg, Union County, Pennsylvania
→1991Lewistown Armory — Lewistown, Mifflin County, Pennsylvania
→1988Liberty Bridge — Pittsburgh, Allegheny County, Pennsylvania
→1985Liberty Fire Company No. 5 — Reading, Berks County, Pennsylvania
→1978Liberty Hall — Quakertown, Bucks County, Pennsylvania
→1986Liberty School No. 4, Friendship Building — Pittsburgh, Allegheny County, Pennsylvania
→1973Lightfoot Mill ★ NHL — Chester Springs, Chester County, Pennsylvania
→1978Lightner, Isaac, House — Glenshaw, Allegheny County, Pennsylvania
→1991Ligonier Armory — Ligonier, Westmoreland County, Pennsylvania
→1994Ligonier Historic District — Ligonier, Westmoreland County, Pennsylvania
→1988Lilly Bridge — Lilly, Cambria County, Pennsylvania
→1980Lime Valley Covered Bridge — Refton, Lancaster County, Pennsylvania
→1986Lincoln Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1988Lincoln, Mordecai, House — Lorane, Berks County, Pennsylvania
→1988Lindbergh Viaduct — Reading, Berks County, Pennsylvania
→1986Linden Avenue School — Pittsburgh, Allegheny County, Pennsylvania
→1979Linden Grove Pavilion — Coopersburg, Lehigh County, Pennsylvania
→1989Linden Hall at Saint James Park — Dawson, Fayette County, Pennsylvania
→1990Linden Hall Historic District — Linden Hall, Centre County, Pennsylvania
→1983Linden House — Marietta, Lancaster County, Pennsylvania
→1998Lindsey, Christiana, House — Mercer Borough, Mercer County, Pennsylvania
→1987Linn Run State Park Family Cabin District — Rector, Westmoreland County, Pennsylvania
→1980Lionville Historic District — Lionville, Chester County, Pennsylvania
→1979Lippincott Covered Bridge — Waynesburg, Greene County, Pennsylvania
→1986Lititz Moravian Historic District — Lititz, Lancaster County, Pennsylvania
→1979Lits Department Store — Philadelphia, Philadelphia County, Pennsylvania
→1986Littell, David, House — Hookstown, Beaver County, Pennsylvania
→1978Little Buffalo Historic District — Newport, Perry County, Pennsylvania
→1980Little Gap Covered Bridge — Little Gap, Carbon County, Pennsylvania
→1980Little Jerusalem AME Church — Cornwells Heights, Bucks County, Pennsylvania
→1996Little, Moses, Tavern — Laboratory, Washington County, Pennsylvania
→1996Livingood House--Stryker Hospital — Reading, Berks County, Pennsylvania
→2017Llanerch Public School — Haverford Township, Delaware County, Pennsylvania
→1990Lloyd and Henry Warehouse — Huntingdon, Huntingdon County, Pennsylvania
→2002Llyswen Historic District — Altoona, Blair County, Pennsylvania
→1992Lobb's Cemetery and Yohogania County Courthouse Site — West Elizabeth, Allegheny County, Pennsylvania
→1984Lochiel Farm — West Whiteland, Chester County, Pennsylvania
→1981Lock Ridge Furnance Complex — Alburtis, Lehigh County, Pennsylvania
→1979Locomotive No. 6755 — Strasburg, Lancaster County, Pennsylvania
→1977Locust Grove — Bainbridge, Lancaster County, Pennsylvania
→2021Locust Grove Cemetery — Shippensburg, Cumberland County, Pennsylvania
→1979Log House, Hiester House, and Market Annex — Reading, Berks County, Pennsylvania
→1988Logan Demonstration School — Philadelphia, Philadelphia County, Pennsylvania
→1977Logan Furnace Mansion — Bellefonte, Centre County, Pennsylvania
→1979Logan Mills Covered Bridge — Loganton, Clinton County, Pennsylvania
→1980Logan Mills Gristmill — Logan Mills, Clinton County, Pennsylvania
→1981Logan Square — Philadelphia, Philadelphia County, Pennsylvania
→1998Logans Ferry Powder Works Historic District — Plum Borough, Allegheny County, Pennsylvania
→1978Loller Academy — Hatboro, Montgomery County, Pennsylvania
→1973Long Meadow Farm — Schwenksville, Montgomery County, Pennsylvania
→1990Long--Hawerter Mill — Topton, Berks County, Pennsylvania
→1984Longfellow School — Pittsburgh, Allegheny County, Pennsylvania
→1988Longfellow, Henry, School — Philadelphia, Philadelphia County, Pennsylvania
→1999Longland — Holicong, Bucks County, Pennsylvania
→2005Longue Vue Club and Golf Course — Penn Hills Township, Allegheny County, Pennsylvania
→1993Longwell, David, House — Monongahela City, Washington County, Pennsylvania
→1972Longwood Gardens District — Hamorton, Chester County, Pennsylvania
→1980Lord House — Lords Valley, Pike County, Pennsylvania
→2002Lorraine Apartments — Philadelphia, Philadelphia County, Pennsylvania
→1980Loux Covered Bridge — Pipersville, Bucks County, Pennsylvania
→1997Lovell Manufacturing Company — Erie, Erie County, Pennsylvania
→1988Lowell, James Russell, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Lower Humbert Bridge — Ursina, Somerset County, Pennsylvania
→1980Lower Marsh Creek Presbyterian Church — Orrtanna, Adams County, Pennsylvania
→2002Lower Merion Academy--Cynwyd Elementary School--Bala Cynwyd Junior High School Complex — Bala Cynwyd, Montgomery County, Pennsylvania
→1999Lower North Philadelphia Speculative Housing Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1980Lower Swedish Cabin — Clifton Heights, Delaware County, Pennsylvania
→1979Lowrie, Sen. Walter, House — Butler, Butler County, Pennsylvania
→2016Loyalhanna Lodge No. 275 — Latrobe, Westmoreland County, Pennsylvania
→1988Ludlow, James R., School — Philadelphia, Philadelphia County, Pennsylvania
→1994Lukens Historic District ★ NHL — Coatsville, Chester County, Pennsylvania
→1976Lukens Main Office Building — Coatesville, Chester County, Pennsylvania
→1984Lumberville Historic District — Lumberville, Bucks County, Pennsylvania
→1979Lunn's Tavern — Strickersville, Chester County, Pennsylvania
→2003Lupfer, Israel and Samuel, Tannery Site and House — Toboyne, Perry County, Pennsylvania
→1974Lutheran Theological Seminary-Old Dorm — Gettysburg, Adams County, Pennsylvania
→2008Lutz-Franklin School — Lower Saucon Township, Northampton County, Pennsylvania
→1996Lutz, John F., Furniture Co. & Funerary — St. Lawrence, Berks County, Pennsylvania
→1980Luzerne County Courthouse — Wilkes-Barre, Luzerne County, Pennsylvania
→2004Luzerne County Fresh Air Camp — Butler Township, Luzerne County, Pennsylvania
→1979Luzerne Presbyterial Institute — Wyoming, Luzerne County, Pennsylvania
→2017Lycoming Rubber Company — Williamsport, Lycoming County, Pennsylvania
→1979Lyle Covered Bridge — Raccoon, Washington County, Pennsylvania
→2007Lynn Hall — Liberty Township, McKean County, Pennsylvania
→1986Madison Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→2009Madison, James, School — Scranton, Lackawanna County, Pennsylvania
→1974Main Building, U.S. Bureau of Mines — Pittsburgh, Allegheny County, Pennsylvania
→1979Main Library — Erie, Erie County, Pennsylvania
→1974Makefield Meeting — Newtown, Bucks County, Pennsylvania
→1974Malden Inn — Blainsburg, Washington County, Pennsylvania
→1983Malvern Hall — Philadelphia, Philadelphia County, Pennsylvania
→1980Manasses Guth Covered Bridge — Orefield, Lehigh County, Pennsylvania
→1983Manayunk Main Street Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1975Manchester Historic District — Pittsburgh, Allegheny County, Pennsylvania
→2014Manchester School No. 3 — Fairview Township, Erie County, Pennsylvania
→1975Manchester, Isaac, House — Avella, Washington County, Pennsylvania
→2000Manheim Borough Historic District — Manheim Borough, Lancaster County, Pennsylvania
→1988Mann, William, School — Philadelphia, Philadelphia County, Pennsylvania
→1987Manor Street Elementary School — Columbia, Lancaster County, Pennsylvania
→1979Mansfield — Mercersburg, Franklin County, Pennsylvania
→1991Mansfield Armory — Mansfield, Tioga County, Pennsylvania
→1984Marianna Historic District — Marianna, Washington County, Pennsylvania
→1978Marietta Historic District — Marietta, Lancaster County, Pennsylvania
→1984Marietta Historic District (Boundary Increase) — Marietta, Lancaster County, Pennsylvania
→1976Marine Barracks — Philadelphia, Philadelphia County, Pennsylvania
→2004Marine Corps Depot of Supplies, Schuykill Warehouse — Philadelphia, Philadelphia County, Pennsylvania
→1975Marine Corps Supply Activity — Philadelphia, Philadelphia County, Pennsylvania
→1988Marion Bridge — Point Marion, Fayette County, Pennsylvania
→1988Market Street Bridge — Harrisburg, Cumberland County, Pennsylvania
→1988Market Street Bridge — Wilkes-Barre, Luzerne County, Pennsylvania
→1996Markle Banking & Trust Company Building — Hazleton, Luzerne County, Pennsylvania
→1996Marklesburg Historic District — Marklesburg, Huntingdon County, Pennsylvania
→1995Marlborough Village Historic District — Kennett Square, Chester County, Pennsylvania
→2022Marsh Creek Advent Church — Bellefonte, Centre County, Pennsylvania
→1971Marshall, Humphry, House — Marshallton, Chester County, Pennsylvania
→1987Marshall, Humphry, House ★ NHL — Marshallton, Chester County, Pennsylvania
→1988Marshall, John, School — Philadelphia, Philadelphia County, Pennsylvania
→1976Marshall, Thomas, House — Dayton, Armstrong County, Pennsylvania
→1988Marshall's Bridge — Little Washington, Chester County, Pennsylvania
→1986Marshallton Historic District — Marshallton, Chester County, Pennsylvania
→1977Marshallton Inn — Marshallton, Chester County, Pennsylvania
→1995Martin Farmstead — Washington, Washington County, Pennsylvania
→1986Martin Orthopedic School — Philadelphia, Philadelphia County, Pennsylvania
→2010Martin Tower — Bethlehem, Lehigh County, Pennsylvania
→1973Martin-Little House — Phoenixville, Chester County, Pennsylvania
→1990Martin, B. B., Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→2018Martin, C.F. & Company. — Nazareth, Northampton County, Pennsylvania
→1988Martin, James, School — Philadelphia, Philadelphia County, Pennsylvania
→1979Martin's Mill Covered Bridge — Marianna, Washington County, Pennsylvania
→1974Martin's Mill Covered Bridge — Greencastle, Franklin County, Pennsylvania
→1991Mary Ann Furnace Historic District — Longswamp, Berks County, Pennsylvania
→2022Mary Immaculate Seminary (MIS) — Northampton, Northampton County, Pennsylvania
→1983Mascot Roller Mills — Mascot, Lancaster County, Pennsylvania
→2013Mascot Roller Mills (Boundary Increase) — Mascot, Lancaster County, Pennsylvania
→1979Mask and Wig Club of the University of Pennsylvania — Philadelphia, Philadelphia County, Pennsylvania
→1976Masonic Temple — Chambersburg, Franklin County, Pennsylvania
→1971Masonic Temple ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1997Masonic Temple and Scottish Rite Cathedral — Scranton, Lackawanna County, Pennsylvania
→1970Massey, Thomas, House — Broomall, Delaware County, Pennsylvania
→1979Matlack, Enoch, House — Hummelstown, Dauphin County, Pennsylvania
→1976Mauch Chunk and Summit Hill Switchback Railroad — Jim Thorpe, Carbon County, Pennsylvania
→1993Mauer, Dr. Joseph House — Washington, Washington County, Pennsylvania
→1971Maxwell, Ebenezer, House — Philadelphia, Philadelphia County, Pennsylvania
→2021Mayer Building — Erie, Erie County, Pennsylvania
→2017Mayer, David M., House — Lancaster, Lancaster County, Pennsylvania
→1982Mayfair House — Philadelphia, Philadelphia County, Pennsylvania
→1979Mays, Blaney Covered Bridge — Claysville, Washington County, Pennsylvania
→1982McAllister-Beaver House — Bellefonte, Centre County, Pennsylvania
→1976McAllister, Archibald, House — Harrisburg, Dauphin County, Pennsylvania
→2000McCalls Ferry Farm — Lower Chanceford Township, York County, Pennsylvania
→1985McCallum Manor — Philadelphia, Philadelphia County, Pennsylvania
→1988McClay's Twin Bridge (East) — Middle Spring, Franklin County, Pennsylvania
→1988McClay's Twin Bridge (West) — Middle Spring, Franklin County, Pennsylvania
→1986McCleary Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1989McClelland Homestead — Bessemer, Lawrence County, Pennsylvania
→2010McClelland-Grimes Farm — Morgan, Greene County, Pennsylvania
→2002McClenathan, J.C., Dr., House and Office — Connellsville, Fayette County, Pennsylvania
→1972McClintock Hall — Wilkes-Barre, Luzerne County, Pennsylvania
→1988McClure, Alexander K., School — Philadelphia, Philadelphia County, Pennsylvania
→2005McCollum and Post Silk Mill — Nazareth Borough, Northampton County, Pennsylvania
→1966McConkey Ferry Inn ★ NHL — Yardley, Bucks County, Pennsylvania
→1976McConnell House — McConnellsburg, Fulton County, Pennsylvania
→1980McConnell's Mill Covered Bridge — Princeton, Lawrence County, Pennsylvania
→1993McConnellsburg Historic District — McConnellsburg, Fulton County, Pennsylvania
→2011McCook Family Estate — Pittsburgh City, Allegheny County, Pennsylvania
→1974McCormick, John B., House — Georgeville, Indiana County, Pennsylvania
→1973McCoy House — Lewistown, Mifflin County, Pennsylvania
→1980McCoy-Shoemaker Farm — Upton, Franklin County, Pennsylvania
→1986McDaniel, Delaplaine, School — Philadelphia, Philadelphia County, Pennsylvania
→2013McDowell Memorial Presbyterian Church — Philadelphia, Philadelphia County, Pennsylvania
→2004McFarlane, Andrew and Jennie, House — North Huntingdon, Westmoreland County, Pennsylvania
→1980McGees Mills Covered Bridge — Mahaffey, Clearfield County, Pennsylvania
→1990McGovern, Edward, Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1979McIlvain, Francis, House — Philadelphia, Philadelphia County, Pennsylvania
→1988McKees Rocks Bridge — Bellevue, Allegheny County, Pennsylvania
→1980McKeesport National Bank — McKeesport, Allegheny County, Pennsylvania
→1991McKelvy House — Easton, Northampton County, Pennsylvania
→1986Meade, George, School — Philadelphia, Philadelphia County, Pennsylvania
→1978Meadowcroft Rockshelter ★ NHL — Avella, Washington County, Pennsylvania
→1984Meadville Downtown Historic District — Meadville, Crawford County, Pennsylvania
→1971Meason, Isaac, House ★ NHL — Mount Braddock, Fayette County, Pennsylvania
→1983Mechanicsburg Commercial Historic District — Mechanicsburg, Cumberland County, Pennsylvania
→1986Mechanicsville School — Philadelphia, Philadelphia County, Pennsylvania
→1989Mechanicsville Village Historic District — Mechanicsville, Bucks County, Pennsylvania
→2017Mecky, A., Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1989Media Armory — Media, Delaware County, Pennsylvania
→1988Meehan, Thomas, School — Philadelphia, Philadelphia County, Pennsylvania
→1973Meier, Isaac, Homestead — Myerstown, Lebanon County, Pennsylvania
→1985Meinig Glove Factory-Meinig, E. Richard, Co. — Reading, Berks County, Pennsylvania
→1992Melchinger, Englehart, House — Dover, York County, Pennsylvania
→2020Melester Barn — South Middleton Township, Cumberland County, Pennsylvania
→1986Melrose — Cheyney, Delaware County, Pennsylvania
→2022Memorial Church of Our Father — Foxburg Borough, Clarion County, Pennsylvania
→1978Memorial Fountain and Statue — Chambersburg, Franklin County, Pennsylvania
→1976Memorial Hall ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2017Memorial Presbyterian Church — Wilkes-Barre, Luzerne County, Pennsylvania
→1973Mennonite Meetinghouse — Philadelphia, Philadelphia County, Pennsylvania
→1985Mentzer Building — Ephrata, Lancaster County, Pennsylvania
→1998Mercer County Court House — Mercer, Mercer County, Pennsylvania
→1972Mercer Museum — Doylestown, Bucks County, Pennsylvania
→1980Mercer's Mill Covered Bridge — Christiana, Lancaster County, Pennsylvania
→1984Mercersburg Academy — Mercersburg, Franklin County, Pennsylvania
→1978Mercersburg Historic District — Mercersburg, Franklin County, Pennsylvania
→1989Mercersburg Historic District (Boundary Increase) — Mercersburg, Franklin County, Pennsylvania
→2021Merchants Cigar Box Company — Dallastown, York County, Pennsylvania
→2001Merchants' Exchange Building ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1984Meredith, Daniel, House — West Whiteland, Chester County, Pennsylvania
→1974Meredith, Simon, House — Pughtown, Chester County, Pennsylvania
→1993Meredith, Stephen, House — Bucktown, Chester County, Pennsylvania
→1986Meredith, William M., School — Philadelphia, Philadelphia County, Pennsylvania
→1987Merion Cricket Club ★ NHL — Haverford, Montgomery County, Pennsylvania
→1998Merion Friends Meeting House ★ NHL — Merion Station, Montgomery County, Pennsylvania
→1989Merion Golf Club, East and West Courses ★ NHL — Ardmore, Delaware County, Pennsylvania
→1996Merit Underwear Company — Shoemakersville, Berks County, Pennsylvania
→1990Merkel Mill — Lenhartsville, Berks County, Pennsylvania
→1990Merkel Mill Complex — Virginville, Berks County, Pennsylvania
→1983Merrick Art Gallery — New Brighton, Beaver County, Pennsylvania
→1980Merrill Lock No. 6 — Midland, Beaver County, Pennsylvania
→1990Methodist Episcopal Church of Burlington — West Burlington, Bradford County, Pennsylvania
→1983Metropolitan Edison Building — Reading, Berks County, Pennsylvania
→1972Metropolitan Opera House — Philadelphia, Philadelphia County, Pennsylvania
→2007Metz Ice Plant — Milford, Pike County, Pennsylvania
→2012Mexican War Streets Historic District (Boundary Increase II) — Pittsburgh, Allegheny County, Pennsylvania
→2008Mexican War Streets Historic District (Boundary Increase) — Pittsburgh, Allegheny County, Pennsylvania
→1975Mexican War Streets Historic District, — Pittsburgh, Allegheny County, Pennsylvania
→2017Meyerhoff, Son and Company Building — Pottstown, Montgomery County, Pennsylvania
→1988Meyers, Albertus L., Bridge — Allentown, Lehigh County, Pennsylvania
→1980Michael, John, Farm — Stroudsburg, Monroe County, Pennsylvania
→1976Michener, Nathan, House — Bucktown, Chester County, Pennsylvania
→1987Middishade Clothing Factory — Philadelphia, Philadelphia County, Pennsylvania
→1991Middle Pickering Rural Historic District — Phoenixville, Chester County, Pennsylvania
→2017Middlekauff, Jacob and Juliana, House — Franklin Township, Adams County, Pennsylvania
→2023Midland Cemetery — Swatara Township, Dauphin County, Pennsylvania
→1983Midtown Harrisburg Historic District — Harrisburg, Dauphin County, Pennsylvania
→1976Mifflin County Courthouse — Lewistown, Mifflin County, Pennsylvania
→1986Mifflin Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1986Mifflin School — Philadelphia, Philadelphia County, Pennsylvania
→1988Mifflin, Thomas, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Mifflinburg Historic District — Mifflinburg, Union County, Pennsylvania
→1979Mikado Freight Locomotive No. 520 — Strasburg, Lancaster County, Pennsylvania
→1971Mikveh Israel Cemetery — Philadelphia, Philadelphia County, Pennsylvania
→1993Milanville Historic District — Milanville, Wayne County, Pennsylvania
→1976Miles-Humes House — Bellefonte, Centre County, Pennsylvania
→1998Milford Historic District — Milford, Pike County, Pennsylvania
→2002Milford Historic District (Boundary Increase) — Milford, Pike County, Pennsylvania
→1990Mill at Lobachsville — Lobachsville, Berks County, Pennsylvania
→1980Mill Creek Historic District — Bryn Mawr, Montgomery County, Pennsylvania
→1996Mill Creek Historic District (Boundary Increase) — Gladwyne, Montgomery County, Pennsylvania
→1972Mill Grove ★ NHL — Audubon, Montgomery County, Pennsylvania
→1993Mill Rift Hall — Mill Rift, Pike County, Pennsylvania
→1977Mill Tract Farm — Stonersville, Berks County, Pennsylvania
→1988Millanville--Skinners Falls Bridge — Millanville, Wayne County, Pennsylvania
→1978Miller Hall — Waynesburg, Greene County, Pennsylvania
→2019Miller, Andrew S. and Elizabeth, House — Bellevue, Allegheny County, Pennsylvania
→1995Miller, Christian, House — Punxsutawney, Jefferson County, Pennsylvania
→1990Miller, David H., Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1975Miller, James, House — Bethel, Allegheny County, Pennsylvania
→1979Miller, Longdon L., Covered Bridge — West Finley, Washington County, Pennsylvania
→1990Miller's House at Spring Mill — Conshohocken, Montgomery County, Pennsylvania
→1992Miller's Store — Trent, Somerset County, Pennsylvania
→2006Millersburg Ferry — Millersburg, Dauphin County, Pennsylvania
→2002Millersburg Passenger Rail Station — Millersburg, Dauphin County, Pennsylvania
→1990Milleysack, J. B. Cigar Factory — Lancaster, Lancaster County, Pennsylvania
→1986Millheim Historic District — Millheim, Centre County, Pennsylvania
→1985Millionaire's Row Historic District — Williamsport, Lycoming County, Pennsylvania
→1979Millmont Farm — Mercersburg, Franklin County, Pennsylvania
→1980Millmont Red Bridge — Millmont, Union County, Pennsylvania
→2003Milmoral — Cheltenham, Montgomery County, Pennsylvania
→1991Milton Armory — Milton, Northumberland County, Pennsylvania
→1977Milton Freight Station — Milton, Northumberland County, Pennsylvania
→1986Milton Historic District — Milton, Northumberland County, Pennsylvania
→2017Mine Roof Simulator — South Park Township, Allegheny County, Pennsylvania
→1990Minersville Coke Ovens — Coalmont, Huntingdon County, Pennsylvania
→1995Minersville Historic District — Johnstown, Cambria County, Pennsylvania
→1992Mingo Creek Presbyterian Church and Churchyard — Courtney, Washington County, Pennsylvania
→1973Mishler Theatre — Altoona, Blair County, Pennsylvania
→1980Mitchell-Shook House — Greencastle, Franklin County, Pennsylvania
→1978Mitchell, James, House — Indiana, Indiana County, Pennsylvania
→1986Mitchell, S. Weir, School — Philadelphia, Philadelphia County, Pennsylvania
→1980Mixsell, Jacob, House — Easton, Northampton County, Pennsylvania
→1987Modern Tool Company — Erie, Erie County, Pennsylvania
→1989Moland House — Hartsville, Bucks County, Pennsylvania
→1972Monastery, The — Philadelphia, Philadelphia County, Pennsylvania
→2001Monongahela Cemetery — Monongahela City, Washington County, Pennsylvania
→1974Monongahela Incline — Pittsburgh, Allegheny County, Pennsylvania
→1979Monroe County Courthouse — Stroudsburg, Monroe County, Pennsylvania
→1989Monroe Furnace — McAlevys Fort, Huntingdon County, Pennsylvania
→1995Monroe Tavern — Hopwood, Fayette County, Pennsylvania
→1983Monte Vista — Philadelphia, Philadelphia County, Pennsylvania
→1976Monterey Historic District — Blue Ridge Summit, Franklin County, Pennsylvania
→1974Montgomery House — Claysville, Washington County, Pennsylvania
→1984Montgomery Ward Building — Lewistown, Mifflin County, Pennsylvania
→1979Montgomery, Gen. William, House — Danville, Montour County, Pennsylvania
→2000Montgomery, William, House — Lancaster, Lancaster County, Pennsylvania
→2011Montrose Historic District — Montrose, Susquehanna County, Pennsylvania
→2013Mooncrest Historic District — Coraopolis, Allegheny County, Pennsylvania
→1974Moore Hall — Phoenixville, Chester County, Pennsylvania
→1972Moore, Capt. Thomas, House — Philadelphia, Philadelphia County, Pennsylvania
→1973Moore, Clarence B., House — Philadelphia, Philadelphia County, Pennsylvania
→1987Mooresburg School — Mooresburg, Montour County, Pennsylvania
→1988Moravian College South Hall — Bethlehem, Northampton County, Pennsylvania
→1972Moravian Pottery and Tile Works — Doylestown, Bucks County, Pennsylvania
→1973Moravian Sun Inn — Bethlehem, Northampton County, Pennsylvania
→1978Moreland-Hoffstot House — Pittsburgh, Allegheny County, Pennsylvania
→1973Morgan, Edward, Log House — Kulpsville, Montgomery County, Pennsylvania
→1995Morgantown Historic District — Morgantown, Berks County, Pennsylvania
→1995Morris--Hair Tavern — Hopwood, Fayette County, Pennsylvania
→1980Morris, Anthony, House — Norristown, Montgomery County, Pennsylvania
→1988Morrison, Andrew J., School — Philadelphia, Philadelphia County, Pennsylvania
→1986Morrow, John, Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1986Morse, Samuel F. B., School — Pittsburgh, Allegheny County, Pennsylvania
→1970Morton Homestead — Prospect Park, Delaware County, Pennsylvania
→2000Morton, Morton, House — Norwood, Delaware County, Pennsylvania
→1985Mortonville Hotel — Coatesville, Chester County, Pennsylvania
→1990Moselem Farms Mill — Moselem, Berks County, Pennsylvania
→1976Mosier, Dr. J. R., Office — Meadville, Crawford County, Pennsylvania
→1992Most Precious Blood Roman Catholic Church, Rectory and Parochial School — Philadelphia, Philadelphia County, Pennsylvania
→1972Mother Bethel A.M.E. Church ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1988Mount Airy Historic District — Bethlehem, Lehigh County, Pennsylvania
→1980Mount Hope Estate — Manheim, Lancaster County, Pennsylvania
→1991Mount Hope Estate (Boundary Increase) — Mount Hope, Lancaster County, Pennsylvania
→1971Mount Joy — Conshohocken, Montgomery County, Pennsylvania
→1966Mount Pleasant ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1989Mount Pleasant Armory — Mount Pleasant, Westmoreland County, Pennsylvania
→1998Mount Pleasant Historic District — Mount Pleasant, Westmoreland County, Pennsylvania
→1985Mount Pleasant Historic District — Harrisburg, Dauphin County, Pennsylvania
→1990Mount Pleasant Historic District (Boundary Increase) — Harrisburg, Dauphin County, Pennsylvania
→1998Mount St. Peter Roman Catholic Church — New Kensington, Westmoreland County, Pennsylvania
→1994Mount Union Historic District — Mount Union Borough, Huntingdon County, Pennsylvania
→1991Mount Vernon Furnace — Scottdale, Fayette County, Pennsylvania
→2015Mount Zion A.M.E. Church — Tredyffrin Township, Chester County, Pennsylvania
→1985Mountain Meadow Farm — Newlin Twp., Chester County, Pennsylvania
→1982Mountain Springs Hotel — Ephrata, Lancaster County, Pennsylvania
→1999Moxham Historic District — Johnstown, Cambria County, Pennsylvania
→2001Moyer, John Nicholas and Elizabeth, House — New Shaefferstown, Berks County, Pennsylvania
→1977Mt. Airy Station — Philadelphia, Philadelphia County, Pennsylvania
→2012Mt. Gretna Campmeeting Historic District — Mt. Gretna Heights, Lebanon County, Pennsylvania
→1980Mt. Pleasant Covered Bridge — New Germantown, Perry County, Pennsylvania
→1974Mt. Pleasant Iron Works House — Fort Loudon, Franklin County, Pennsylvania
→1995Muddy Creek Bridge, Maryland and Pennsylvania Railroad — Sunnyburn, York County, Pennsylvania
→1994Muddy Creek Forks Historic District — Muddy Creek Forks, York County, Pennsylvania
→1988Muhlenberg School — Philadelphia, Philadelphia County, Pennsylvania
→2000Muhlenberg, Henry Melchoir, House — Trappe, Montgomery County, Pennsylvania
→1986Muhr, Simon, Work Training School — Philadelphia, Philadelphia County, Pennsylvania
→2004Mulford Building — Philadelphia, Philadelphia County, Pennsylvania
→1978Mulford, Sylvanus, House — Montrose, Susquehanna County, Pennsylvania
→1997Mumma, Samuel N., Tobacco Warehouse — Landisville, Lancaster County, Pennsylvania
→1996Munce, Thomas, House — Washington, Washington County, Pennsylvania
→1980Muncy Historic District — Muncy, Lycoming County, Pennsylvania
→1981Municipal Building and Central Fire Station, 340 — Scranton, Lackawanna County, Pennsylvania
→1979Murray, Thomas, House — Clearfield, Clearfield County, Pennsylvania
→1971Musical Fund Hall ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1990N. Shippen--Tobacco Avenue Historic District — Lancaster, Lancaster County, Pennsylvania
→2003N. Snellenburg Company Department Store Warehouse — Philadelphia, Philadelphia County, Pennsylvania
→1972Nace (Neas), George, House — Hanover, York County, Pennsylvania
→2008Nakashima, George, House, Studio and Workshop ★ NHL — Solebury, Bucks County, Pennsylvania
→2003Narbrook Park Historic District — Narberth, Montgomery County, Pennsylvania
→1979Nathan's Department Store — Johnstown, Cambria County, Pennsylvania
→1977National Bank of Coatesville Building — Coatesville, Chester County, Pennsylvania
→1985National Bank of North Philadelphia — Philadelphia, Philadelphia County, Pennsylvania
→1978National Transit Building — Oil City, Venango County, Pennsylvania
→1980Nazareth Hall Tract — Nazareth, Northampton County, Pennsylvania
→1988Nazareth Historic District — Nazareth, Northampton County, Pennsylvania
→1993Nearpass House — Mill Rift, Pike County, Pennsylvania
→1988Nebinger, George W., School — Philadelphia, Philadelphia County, Pennsylvania
→1979Neff Round Barn — Centre Hall, Centre County, Pennsylvania
→1977Neff, Maj. John, Homestead — Centre Hall, Centre County, Pennsylvania
→1980Neff's Mill Covered Bridge — Strasburg, Lancaster County, Pennsylvania
→1980Neill-Mauran House — Philadelphia, Philadelphia County, Pennsylvania
→2000Nelson, John H., House — Fallowfield, Washington County, Pennsylvania
→2003Nesquehoning High School — Nesquehoning, Carbon County, Pennsylvania
→1980Neuweiler Brewery — Allentown, Lehigh County, Pennsylvania
→1974Neville House ★ NHL — Heidelberg, Allegheny County, Pennsylvania
→1980New Baltimore Bridge — New Baltimore, Somerset County, Pennsylvania
→1972New Berlin Presbyterian Church — New Berlin, Union County, Pennsylvania
→1991New Castle Armory — New Castle, Lawrence County, Pennsylvania
→1983New Century Clubhouse — West Chester, Chester County, Pennsylvania
→1993New Century Guild ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2005New Colonial Hotel — Meyersdale, Somerset County, Pennsylvania
→1981New Enterprise Public School — New Enterprise, Bedford County, Pennsylvania
→1983New Era Building — Lancaster, Lancaster County, Pennsylvania
→1995New Freedom Railroad Station, Northern Central Railway — New Freedom, York County, Pennsylvania
→1996New Geneva Historic District — New Geneva, Fayette County, Pennsylvania
→1980New Germantown Covered Bridge — New Germantown, Perry County, Pennsylvania
→2010New Granada Theater — Pittsburgh, Allegheny County, Pennsylvania
→1974New Hamburg Historical Area — Greenville, Mercer County, Pennsylvania
→2000New Holland Machine Company — New Holland, Lancaster County, Pennsylvania
→1985New Hope Village District — New Hope, Bucks County, Pennsylvania
→1998New Kensington Downtown Historic District — New Kensington, Westmoreland County, Pennsylvania
→1998New Kensington Production Works Historic District — New Kensington, Westmoreland County, Pennsylvania
→1966New Market ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2019New Paris Covered Bridge — New Paris, Bedford County, Pennsylvania
→1978New Ringgold Gristmill — New Ringgold, Schuylkill County, Pennsylvania
→1984New Thomson House — Kane, McKean County, Pennsylvania
→1980New York Mutual Life Insurance Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1983Newlin Mill Complex — Glen Mills, Delaware County, Pennsylvania
→1984Newlin Miller's House — West Whiteland, Chester County, Pennsylvania
→1972Newlin, Nicholas, House — Concordville, Delaware County, Pennsylvania
→1998Newmyer, Peter and Jonathan, Farm — Bullskin Township, Fayette County, Pennsylvania
→1999Newport Historic District — Newport and Oliver Township, Perry County, Pennsylvania
→1988Newtown Creek Bridge — Newtown, Bucks County, Pennsylvania
→1977Newtown Friends Meetinghouse and Cemetery — Newtown, Bucks County, Pennsylvania
→1979Newtown Historic District — Newtown, Bucks County, Pennsylvania
→1986Newtown Historic District (Boundary Increase: North and South Extensions) — Newtown, Bucks County, Pennsylvania
→1986Newtown Historic District (Boundary Increase) — Newtown, Bucks County, Pennsylvania
→1987Newtown Presbyterian Church — Newtown, Bucks County, Pennsylvania
→2010Newville Historic District — Newville, Cumberland County, Pennsylvania
→1976Nicholas, Jacob, House — Easton, Northampton County, Pennsylvania
→1988Nichols, Jeremiah, School — Philadelphia, Philadelphia County, Pennsylvania
→1985Nicholson House and Inn — Erie, Erie County, Pennsylvania
→1986Ninth Street Bridge — Pittsburgh, Allegheny County, Pennsylvania
→1996Nissly Swiss Chocolate Company — Mount Joy, Lancaster County, Pennsylvania
→1989Nissly--Stauffer Tobacco Warehouses — Lancaster, Lancaster County, Pennsylvania
→1970Nitre Hall — Haverford, Delaware County, Pennsylvania
→1996Noble, J. L. School — Altoona, Blair County, Pennsylvania
→1982Nook, The — York Spring Garden, York County, Pennsylvania
→1984Noon, Philip, House — Ebensburg, Cambria County, Pennsylvania
→2001Normandy Farmstead — Whitpain Township, Montgomery County, Pennsylvania
→1985North Broad Street Mansion District — Philadelphia, Philadelphia County, Pennsylvania
→1996North Broad Street Station, Reading Company — Philadelphia, Philadelphia County, Pennsylvania
→1989North Charlotte Street Historic District — Lancaster, Lancaster County, Pennsylvania
→1990North East Historic District — North East, Erie County, Pennsylvania
→2000North Hill Historic District — New Castle, Lawrence County, Pennsylvania
→1979North Oriental Covered Bridge — Oriental, Juniata County, Pennsylvania
→1989North Prince Street Historic District — Lancaster, Lancaster County, Pennsylvania
→1999North Scranton Junior High School — Scranton, Lackawanna County, Pennsylvania
→1985North Wayne Historic District — Wayne, Delaware County, Pennsylvania
→2020Northampton County Bridge No. 15 — Lower Saucon Township, Northampton County, Pennsylvania
→1985Northbrook Historic District — Newlin, Pocopson & W. Bradford Twps., Chester County, Pennsylvania
→1986Northeast Lancaster Township Historic District — Lancaster, Lancaster County, Pennsylvania
→1986Northeast Manual Training School — Philadelphia, Philadelphia County, Pennsylvania
→1985Northern Liberties Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1985Northern National Bank — Philadelphia, Philadelphia County, Pennsylvania
→1977Northern Saving Fund and Safe Deposit Company — Philadelphia, Philadelphia County, Pennsylvania
→1974Northumberland County Courthouse — Sunbury, Northumberland County, Pennsylvania
→1988Northumberland Historic District — Northumberland, Northumberland County, Pennsylvania
→1983Northwest York Historic District — York, York County, Pennsylvania
→2006Noxen School — Noxen Township, Wyoming County, Pennsylvania
→2006Nugent Home for Baptists — Philadelphia, Philadelphia County, Pennsylvania
→1990Nutt, Adam Clarke, Mansion — Uniontown, Fayette County, Pennsylvania
→1980Nutting Hall — Pine Grove, Schuylkill County, Pennsylvania
→1979Nyce Farm — Bushkill, Pike County, Pennsylvania
→2005O'Connor, J.S., American Rich Cut Glassware Factory — Hawley, Wayne County, Pennsylvania
→1986O'Donel House and Farm — Blain, Perry County, Pennsylvania
→1978O'Hara, John, House — Pottsville, Schuylkill County, Pennsylvania
→1979Oak Hall Historic District — Oak Hall, Centre County, Pennsylvania
→1999Oak Hill Estate — North Union Township, Fayette County, Pennsylvania
→1998Oak Park Historic District — Hatfiels Township, Montgomery County, Pennsylvania
→1972Oakdale — Chadds Ford, Chester County, Pennsylvania
→1997Oakdale Public School — Oakdale, Allegheny County, Pennsylvania
→1987Oakland Public School — Pittsburgh, Allegheny County, Pennsylvania
→1984Oaklands — West Whiteland, Chester County, Pennsylvania
→1977Oakley, Violet, Studio — Philadelphia, Philadelphia County, Pennsylvania
→1984Oakmont Country Club Historic District ★ NHL — Oakmont, Allegheny County, Pennsylvania
→2019Oaks Cloister — Philadelphia, Philadelphia County, Pennsylvania
→1977Octagon Stone Schoolhouse — South Canaan, Wayne County, Pennsylvania
→1979Ogden House — Swarthmore, Delaware County, Pennsylvania
→1991Ogontz Hall — Philadelphia, Philadelphia County, Pennsylvania
→1991Oil City Armory — Oil City, Venango County, Pennsylvania
→1997Oil City Downtown Commercial Historic District — Oil City, Venango County, Pennsylvania
→1999Oil City North Side Historic District — Oil City, Venango County, Pennsylvania
→1997Oil City South Side Historic District — Oil City, Venango County, Pennsylvania
→1993Okehocking Historic District — Media, Chester County, Pennsylvania
→1984Old Allegheny Rows Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1973Old Brown's Mill School — Kauffman, Franklin County, Pennsylvania
→1972Old City Hall — Lancaster, Lancaster County, Pennsylvania
→1972Old City Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1988Old Columbia--Wrightsville Bridge — Columbia, Lancaster County, Pennsylvania
→1995Old Conemaugh Borough Historic District — Johnstown, Cambria County, Pennsylvania
→1972Old Customshouse — Erie, Erie County, Pennsylvania
→1983Old Downtown Harrisburg Commercial Historic District — Harrisburg, Dauphin County, Pennsylvania
→1984Old Downtown Harrisburg Commercial Historic District (Boundary Increase) — Harrisburg, Dauphin County, Pennsylvania
→1978Old Dry Road — Wernersville, Berks County, Pennsylvania
→1966Old Economy ★ NHL — Ambridge, Beaver County, Pennsylvania
→1979Old Federal Reserve Bank — Philadelphia, Philadelphia County, Pennsylvania
→1972Old Germantown Academy And Headmasters' Houses — Philadelphia, Philadelphia County, Pennsylvania
→1972Old Hannastown, Site of — Greensburg, Westmoreland County, Pennsylvania
→1976Old Heidelberg Apartments — Pittsburgh, Allegheny County, Pennsylvania
→1980Old Homestead — Enon Valley, Lawrence County, Pennsylvania
→1978Old Hoopes School — Lewistown, Mifflin County, Pennsylvania
→1974Old Indiana County Courthouse — Indiana, Indiana County, Pennsylvania
→1979Old Indiana County Jail and Sheriff's Office — Indiana, Indiana County, Pennsylvania
→1974Old Kennett Meetinghouse — West Chester, Chester County, Pennsylvania
→1981Old Lehigh County Courthouse — Allentown, Lehigh County, Pennsylvania
→1973Old Main — Upland, Delaware County, Pennsylvania
→1978Old Main and Chemistry Building — Chester, Delaware County, Pennsylvania
→1974Old Main, California State College — California, Washington County, Pennsylvania
→1975Old Main, Goethean Hall, and Diagnothian Hall — Lancaster, Lancaster County, Pennsylvania
→1977Old Mauch Chunk Historic District — Jim Thorpe, Carbon County, Pennsylvania
→1979Old Norriton Presbyterian Church — Norristown, Montgomery County, Pennsylvania
→1985Old Pottstown Historic District — Pottstown, Montgomery County, Pennsylvania
→1991Old Pottstown Historic District (Boundary Increase) — Pottstown, Montgomery County, Pennsylvania
→1971Old Rose Tree Tavern — Media, Delaware County, Pennsylvania
→1979Old Stone Arch Bridge — Lewistown, Mifflin County, Pennsylvania
→1974Old Swede's House — Douglassville, Berks County, Pennsylvania
→1979Old Town Historic District — Clearfield, Clearfield County, Pennsylvania
→1972Old Union County Courthouse — New Berlin, Union County, Pennsylvania
→1990Old Uptown Harrisburg Historic District — Harrisburg, Dauphin County, Pennsylvania
→1972Old Waterworks ★ NHL — Bethlehem, Northampton County, Pennsylvania
→1966Old West, Dickinson College ★ NHL — Carlisle, Cumberland County, Pennsylvania
→1975Old White Mill — Meshoppen, Wyoming County, Pennsylvania
→1983Oley Township Historic District — Oley Township, Berks County, Pennsylvania
→1987Oliver, David P., High School — Pittsburgh, Allegheny County, Pennsylvania
→1996Oller, Joseph J., House — Waynesboro, Franklin County, Pennsylvania
→1986Olney Elementary School — Philadelphia, Philadelphia County, Pennsylvania
→1986Olney High School — Philadelphia, Philadelphia County, Pennsylvania
→1985Oregon Mill Complex — Oregon, Lancaster County, Pennsylvania
→2014Original Little League Field — Williamsport, Lycoming County, Pennsylvania
→1977Ormrod, George, House — Tamaqua, Schuylkill County, Pennsylvania
→1987Orris, Adam, House — Mechanicsburg, Cumberland County, Pennsylvania
→1972Orthodox Meetinghouse — West Chester, Chester County, Pennsylvania
→2014Ortlieb, Henry F., Company Bottling House — Philadelphia, Philadelphia County, Pennsylvania
→1980Osterburg Covered Bridge — Osterburg, Bedford County, Pennsylvania
→1985Osterling, Frederick J., Office and Studio — Pittsburgh, Allegheny County, Pennsylvania
→1996Ostheimer, Martha and Maurice, Estate — Exton, Chester County, Pennsylvania
→1985Overbrook Farms — Philadelphia, Philadelphia County, Pennsylvania
→2021Overbrook Gardens Apartments — Philadelphia, Philadelphia County, Pennsylvania
→1986Overbrook High School — Philadelphia, Philadelphia County, Pennsylvania
→1988Overbrook School — Philadelphia, Philadelphia County, Pennsylvania
→2007Oxford Historic District — Oxford-Borough, Chester County, Pennsylvania
→1994Oxford Hotel — Oxford, Chester County, Pennsylvania
→1995Oyer, Christian, Jr., House — Huntingdon, Huntingdon County, Pennsylvania
→1980Packard Motor Corporation Building — Philadelphia, Philadelphia County, Pennsylvania
→1979Packer Memorial Chapel — Bethlehem, Northampton County, Pennsylvania
→1974Packer, Asa, Mansion ★ NHL — Jim Thorpe, Carbon County, Pennsylvania
→1974Packer, Harry, Mansion — Jim Thorpe, Carbon County, Pennsylvania
→1991Packer, Isaac A., Farm — Lock Haven, Clinton County, Pennsylvania
→1980Packsaddle Bridge — Glen Savage, Somerset County, Pennsylvania
→1978Packwood House-American Hotel — Lewisburg, Union County, Pennsylvania
→1972Pagoda — Reading, Berks County, Pennsylvania
→1971Painter, William, Farm — Chadds Ford, Delaware County, Pennsylvania
→1988Palmer, Amos, House — Langhorne, Bucks County, Pennsylvania
→1997Paoli Battlefield Site and Parade Grounds — Malvern, Chester County, Pennsylvania
→1990Paradise Furnace — Entriken, Huntingdon County, Pennsylvania
→1992Paradise Valley Historic District — Marshallton, Chester County, Pennsylvania
→1984Pardee, Israel Platt, Mansion — Hazleton, Luzerne County, Pennsylvania
→2004Park Dinor — Lawrence Park Township, Erie County, Pennsylvania
→1986Park Place School — Pittsburgh, Allegheny County, Pennsylvania
→2011Park Towne Place — Philadelphia, Philadelphia County, Pennsylvania
→1987Parker Dam State Park Family Cabin District — Penfield, Clearfield County, Pennsylvania
→1987Parker Dam State Park--Octagonal Lodge — Penfield, Clearfield County, Pennsylvania
→1987Parker Dam State Park--Parker Dam District — Penfield, Clearfield County, Pennsylvania
→1983Parker's Ford — Parkerford, Chester County, Pennsylvania
→1973Parkersville Friends Meetinghouse — Parkersville, Chester County, Pennsylvania
→1980Parkesburg National Bank — Parkesburg, Chester County, Pennsylvania
→1995Parkesburg School — Parkesburg, Chester County, Pennsylvania
→2012Parkhurst Memorial Presbyterian Church — Elkland, Tioga County, Pennsylvania
→2002Parkinson, Robert, Farm — Morris Township, Washington County, Pennsylvania
→2020Parkside Chapel — Henryville, Monroe County, Pennsylvania
→1983Parkside Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1979Parr's Mill Covered Bridge No. 10 — Parr's Mill, Columbia County, Pennsylvania
→1995Parreco, James, House — Greensboro, Greene County, Pennsylvania
→1980Parsons-Taylor House — Easton, Northampton County, Pennsylvania
→1977Passavant House — Zelienople, Butler County, Pennsylvania
→1979Passenger and Baggage Car No. 4639 — Strasburg, Lancaster County, Pennsylvania
→1979Passenger Coach No. 3556 — Strasburg, Lancaster County, Pennsylvania
→1979Passenger Day Coach No. 8177 — Strasburg, Lancaster County, Pennsylvania
→1979Passenger Locomotive No. 1223 — Strasburg, Lancaster County, Pennsylvania
→1979Passenger Locomotive No. 1737 — Strasburg, Lancaster County, Pennsylvania
→1979Passenger Locomotive No. 460 — Strasburg, Lancaster County, Pennsylvania
→1979Passenger Locomotive No. 7002 — Strasburg, Lancaster County, Pennsylvania
→1985Passmore, Mansel, House — Coatesville, Chester County, Pennsylvania
→2022Passtown Elementary School — Valley Township, Chester County, Pennsylvania
→1988Paterson, John M., School — Philadelphia, Philadelphia County, Pennsylvania
→2010Patriotic Order Sons of America Washington Camp 422 — Dreher Township, Wayne County, Pennsylvania
→1979Patterson Covered Bridge No. 112 — Orangeville, Columbia County, Pennsylvania
→1995Patterson, Burd, House — Pottsville, Schuylkill County, Pennsylvania
→1985Patterson, Samuel, House — New Alexandria, Westmoreland County, Pennsylvania
→1996Patton Historic District — Patton, Cambria County, Pennsylvania
→2016Paupack School — Palmyra Township, Pike County, Pennsylvania
→1985Pawling, Isaac, House — Coatesville, Chester County, Pennsylvania
→1986Payne's Folly — Fawn Township, York County, Pennsylvania
→1972Peace Church — Camp Hill, Cumberland County, Pennsylvania
→1966Peale, Charles Willson, House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2021Peerless Furniture Company — Shippensburg, Franklin County, Pennsylvania
→1988Peirce, William S., School — Philadelphia, Philadelphia County, Pennsylvania
→1971Pemberton, Phineas, House — Levittown, Bucks County, Pennsylvania
→1988Pembroke Village Historic District — Bethlehem, Northampton County, Pennsylvania
→1989Penn Alto Hotel — Altoona, Blair County, Pennsylvania
→2023Penn Asylum for Indigent Widows and Single Women — Philadelphia, Philadelphia County, Pennsylvania
→2012Penn Towers — Philadelphia, Philadelphia County, Pennsylvania
→1988Penn Treaty Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→2017Penn Wynn House — Philadelphia, Philadelphia County, Pennsylvania
→2013Penn--Liberty Historic District (Boundary Increase) — Pittsburgh, Allegheny County, Pennsylvania
→1989Penn-Craft Historic District — Penn-Craft, Fayette County, Pennsylvania
→1987Penn-Liberty Historic District — Pittsburgh, Allegheny County, Pennsylvania
→1986Penn, William, High School for Girls — Philadelphia, Philadelphia County, Pennsylvania
→1971Penn, William, Landing Site — Chester, Delaware County, Pennsylvania
→2014Penn, William, Memorial Museum and State Archives Building — Harrisburg, Dauphin County, Pennsylvania
→1978Penn's Cave and Hotel — Centre Hall, Centre County, Pennsylvania
→1985Penn's Park General Store Complex — Penn's Park, Bucks County, Pennsylvania
→1988Pennell, Joseph, School — Philadelphia, Philadelphia County, Pennsylvania
→1985Pennock, Martha, House — Coatesville, Chester County, Pennsylvania
→1986Penns Park Historic District — Wrightstown, Bucks County, Pennsylvania
→1985Pennsalt Historic District — Natrona, Allegheny County, Pennsylvania
→1972Pennsbury Inn — Chadds Ford, Chester County, Pennsylvania
→1969Pennsbury Manor — Morrisville, Bucks County, Pennsylvania
→1971Pennsylvania Academy of the Fine Arts ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1978Pennsylvania Canal and Limestone Run Aqueduct — Milton, Northumberland County, Pennsylvania
→1990Pennsylvania Canal Guard Lock and Feeder Dam, Raystown Branch — Springfield, Huntingdon County, Pennsylvania
→1990Pennsylvania Furnace Mansion — Pennsylvania Furnace, Huntingdon County, Pennsylvania
→1972Pennsylvania Hall, Gettysburg College — Gettysburg, Adams County, Pennsylvania
→1966Pennsylvania Hospital ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1985Pennsylvania Institute for the Deaf and Dumb — Philadelphia, Philadelphia County, Pennsylvania
→2002Pennsylvania Main Line Canal, Juniata Division, Canal Section — Granville Township, Mifflin County, Pennsylvania
→2001Pennsylvania Match Company — Bellefonte, Centre County, Pennsylvania
→1979Pennsylvania Railroad Bridge — Pittsburgh, Allegheny County, Pennsylvania
→1990Pennsylvania Railroad Bridge over Shavers Creek — Petersburg, Huntingdon County, Pennsylvania
→1990Pennsylvania Railroad District — Spruce Creek, Huntingdon County, Pennsylvania
→1999Pennsylvania Railroad Freight Building — Philadelphia, Philadelphia County, Pennsylvania
→1995Pennsylvania Railroad Freight Station — Washington, Washington County, Pennsylvania
→2004Pennsylvania Railroad GG1 Streamlined Electric Locomotive #4859 — Harrisburg, Dauphin County, Pennsylvania
→2003Pennsylvania Railroad Office Building — Philadelphia, Philadelphia County, Pennsylvania
→1990Pennsylvania Railroad Old Bridge over Standing Stone Creek — Huntingdon, Huntingdon County, Pennsylvania
→1979Pennsylvania Railroad Passenger Station — California, Washington County, Pennsylvania
→1976Pennsylvania Railroad Station — Pittsburgh, Allegheny County, Pennsylvania
→1999Pennsylvania Railroad Station at Wayne — Wayne, Delaware County, Pennsylvania
→1986Pennsylvania Railroad Station--Latrobe — Latrobe, Westmoreland County, Pennsylvania
→1985Pennsylvania Railroad Station-Wilkinsburg — Wilkinsburg, Allegheny County, Pennsylvania
→2013Pennsylvania State Capitol Complex (Boundary Revision) ★ NHL — Harrisburg, Dauphin County, Pennsylvania
→1986Pennsylvania State Lunatic Hospital — Harrisburg, Dauphin County, Pennsylvania
→2010Pennsylvania State Office Building — Philadelphia, Philadelphia County, Pennsylvania
→1976Pennypacker Mansion — Schwenksville, Montgomery County, Pennsylvania
→1984Pennypacker, Benjamin, House — West Whiteland, Chester County, Pennsylvania
→1977Pennypacker, Matthias, Farm — Phoenixville, Chester County, Pennsylvania
→1988Pennypacker, Samuel W., School — Philadelphia, Philadelphia County, Pennsylvania
→2022Peoples Bank Building, The — McKeesport, Allegheny County, Pennsylvania
→1985Perikomen Bridge Hotel — Collegeville, Montgomery County, Pennsylvania
→1988Perkiomen Bridge — Collegeville, Montgomery County, Pennsylvania
→1975Perry County Courthouse — New Bloomfield, Perry County, Pennsylvania
→1986Perry High School — Pittsburgh, Allegheny County, Pennsylvania
→2020Peter Woll and Sons Factory — Philadelphia, Philadelphia County, Pennsylvania
→1979Peters House — Bushkill, Pike County, Pennsylvania
→1995Peters--Graham House — Greensboro, Greene County, Pennsylvania
→1971Peters, William, House — Mendenhall, Chester County, Pennsylvania
→1979Petersburg Tollhouse — Addison, Somerset County, Pennsylvania
→1983Pettit's Ford — Dover, York County, Pennsylvania
→2021Philadelphia & Reading Railway: Lansdale Passenger Station — Lansdale, Montgomery County, Pennsylvania
→1976Philadelphia City Hall ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1971Philadelphia College of Art — Philadelphia, Philadelphia County, Pennsylvania
→1978Philadelphia College of Art (Boundary Increase) — Philadelphia, Philadelphia County, Pennsylvania
→1971Philadelphia Contributionship ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1986Philadelphia High School for Girls — Philadelphia, Philadelphia County, Pennsylvania
→1997Philadelphia National Cemetery — Philadelphia, Philadelphia County, Pennsylvania
→1999Philadelphia Naval Shipyard Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2010Philadelphia Quartermaster Depot — Philadelphia, Philadelphia County, Pennsylvania
→1979Philadelphia Racquet Club — Philadelphia, Philadelphia County, Pennsylvania
→1976Philadelphia Savings Fund Society Building ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1993Philadelphia School of Design for Women ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2003Philadelphia School of Occupational Therapy — Philadelphia, Philadelphia County, Pennsylvania
→1982Philadelphia Stock Exchange — Philadelphia, Philadelphia County, Pennsylvania
→1990Philadelphia Wholesales Drug Company Building — Philadelphia, Philadelphia County, Pennsylvania
→2011Philadelphia, Wilmington and Baltimore Railroad Freight Shed — Philadelphia, Philadelphia County, Pennsylvania
→1978Philips, Hardman, House — Philipsburg, Centre County, Pennsylvania
→1999Philipsburg Historic District — Philipsburg, Centre County, Pennsylvania
→1983Phillips Mill Historic District — Solebury, Bucks County, Pennsylvania
→1990Phillips, Joseph and Esther, Plantation — Atglen, Chester County, Pennsylvania
→1976Phipps Conservatory — Pittsburgh, Allegheny County, Pennsylvania
→2000Phipps--McElveen Building — Pittsburgh, Allegheny County, Pennsylvania
→1987Phoenixville Historic District — Phoenixville, Chester County, Pennsylvania
→2012Phoenixville Historic District (Boundary Decrease) — Phoenixville, Chester County, Pennsylvania
→1987Physicians and Dentists Building — Philadelphia, Philadelphia County, Pennsylvania
→1977Pickle, Simon, Stone House — Madisonburg, Centre County, Pennsylvania
→1988Pickwick — West Whiteland, Chester County, Pennsylvania
→1996Pierce, Jonas J., House — Sharpsville, Mercer County, Pennsylvania
→1973Pierce, Lukens, House — Ercildoun, Chester County, Pennsylvania
→1979Pike County Courthouse — Milford, Pike County, Pennsylvania
→1979Pine Bank Covered Bridge — Studa, Washington County, Pennsylvania
→2004Pine Forge Mansion and Industrial Site — Douglas Township, Berks County, Pennsylvania
→1980Pine Grove Covered Bridge — Kirkwood, Lancaster County, Pennsylvania
→1977Pine Grove Furnace — Dickinson, Cumberland County, Pennsylvania
→1987Pine Grove Historic District — Pine Grove, Schuylkill County, Pennsylvania
→1980Pine Valley Covered Bridge — New Britain, Bucks County, Pennsylvania
→1987Pinehurst Apartments — Philadelphia, Philadelphia County, Pennsylvania
→1980Pinetown Covered Bridge — Lancaster, Lancaster County, Pennsylvania
→1988Pitcairn Building — Philadelphia, Philadelphia County, Pennsylvania
→1973Pithole City, Site of — Titusville, Venango County, Pennsylvania
→1988Pithole Stone Arch — Oleopolis, Venango County, Pennsylvania
→1974Pittsburgh & Lake Erie Railroad Station — Pittsburgh, Allegheny County, Pennsylvania
→1990Pittsburgh and Lake Erie Passenger Station, Aliquippa — Aliquippa, Beaver County, Pennsylvania
→1979Pittsburgh and Lake Erie Railroad Complex — Pittsburgh, Allegheny County, Pennsylvania
→1978Pittsburgh Athletic Association Building — Pittsburgh, Allegheny County, Pennsylvania
→1985Pittsburgh Central Downtown Historic District — Pittsburgh, Allegheny County, Pennsylvania
→2013Pittsburgh Central Downtown Historic District (Boundary Increase) — Pittsburgh, Allegheny County, Pennsylvania
→2014Pittsburgh Mercantile Company Building — Pittsburgh, Allegheny County, Pennsylvania
→2013Pittsburgh Renaissance Historic District — Pittsburgh, Allegheny County, Pennsylvania
→2013Pittsburgh Terminal Warehouse and Transfer Company — Pittsburgh, Allegheny County, Pennsylvania
→1979Plant's Covered Bridge — West Finley, Washington County, Pennsylvania
→1973Plays and Players — Philadelphia, Philadelphia County, Pennsylvania
→2005Plaza Apartments — Philadelphia, Philadelphia County, Pennsylvania
→2012Pleasant Grove School — Germantown, Adams County, Pennsylvania
→1983Pleasant Hill Plantation — Glen Moore, Chester County, Pennsylvania
→1981Pleasantville Bridge — Oley, Berks County, Pennsylvania
→2000Pleasureville Historic Historic — Springettsbury, York County, Pennsylvania
→1979Plumer House — West Newton, Westmoreland County, Pennsylvania
→1971Plymouth Friends Meetinghouse — Plymouth Meeting, Montgomery County, Pennsylvania
→1971Plymouth Meeting Historic District — Plymouth Meeting, Montgomery County, Pennsylvania
→1997Pocono Manor Historic District — Mt. Pocono, Monroe County, Pennsylvania
→1966Poe, Edgar Allan, House, National Historic Site ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1986Poe, Edgar Allen, School — Philadelphia, Philadelphia County, Pennsylvania
→1989Point Pleasant Historic District — Point Pleasant, Bucks County, Pennsylvania
→1988Pond Eddy Bridge — Pond Eddy, Pike County, Pennsylvania
→1988Pond Mill Bridge — Bermudian, Adams County, Pennsylvania
→1972Pont Reading — Ardmore, Delaware County, Pennsylvania
→1980Pool Forge Covered Bridge — Churchtown, Lancaster County, Pennsylvania
→1993Poole Forge — Narvon, Lancaster County, Pennsylvania
→1978Poplar Lane — King of Prussia, Montgomery County, Pennsylvania
→1995Portage Historic District — Portage, Cambria County, Pennsylvania
→1977Portico Row — Philadelphia, Philadelphia County, Pennsylvania
→1983Poth and Schmidt Development Houses — Philadelphia, Philadelphia County, Pennsylvania
→1979Poth, Frederick A., Houses, — Philadelphia, Philadelphia County, Pennsylvania
→1975Potter County Courthouse — Coudersport, Potter County, Pennsylvania
→1977Potter-Allison Farm — Centre Hall, Centre County, Pennsylvania
→1974Pottsgrove Mansion — Pottstown, Montgomery County, Pennsylvania
→2001Pottstown Landing Historic District — North Coventry, Chester County, Pennsylvania
→1974Pottstown Roller Mill — Pottstown, Montgomery County, Pennsylvania
→1991Pottsville Armory — Pottsville, Schuylkill County, Pennsylvania
→1982Pottsville Downtown Historic District — Pottsville, Schuylkill County, Pennsylvania
→1966Powderly, Terence V., House ★ NHL — Scranton, Lackawanna County, Pennsylvania
→1985Powell Farm — Coatesville, Chester County, Pennsylvania
→1985Powell, John, House — Coatesville, Chester County, Pennsylvania
→1985Powelton Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1978Powelton, The — Philadelphia, Philadelphia County, Pennsylvania
→2006Power House ★ NHL — Rankin, Munhall, Swissvale boroughs, Allegheny County, Pennsylvania
→1986Powers, Thomas, School — Philadelphia, Philadelphia County, Pennsylvania
→1983Presque Isle Light — Erie, Erie County, Pennsylvania
→2006Presser Home for Retired Music Teachers — Philadelphia, Philadelphia County, Pennsylvania
→2012Preston Laboratories — Butler, Butler County, Pennsylvania
→1984Price, Joseph, House — West Whiteland, Chester County, Pennsylvania
→1981Priestley, Dr. Joseph, House — Northumberland, Northumberland County, Pennsylvania
→1966Priestley, Joseph, House ★ NHL — Northumberland, Northumberland County, Pennsylvania
→1975Primitive Hall — Chatham, Chester County, Pennsylvania
→1980Princeton Club — Philadelphia, Philadelphia County, Pennsylvania
→1966Printzhof, The ★ NHL — Essington, Delaware County, Pennsylvania
→1978Prizer's Mill Complex — Phoenixville, Chester County, Pennsylvania
→2016Progress Lighting Manufacturing Company — Philadelphia, Philadelphia County, Pennsylvania
→1987Promised Land State Park Whittaker Lodge District — Canadensis, Pike County, Pennsylvania
→1987Promised Land State Park--Bear Wallow Cabins — Canadensis, Pike County, Pennsylvania
→1986Prospect Junior High and Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→2001Protection of the Flag Monument — Athens, Bradford County, Pennsylvania
→1979Protestant Episcopal Church of the Saviour — Philadelphia, Philadelphia County, Pennsylvania
→1997Providence Quaker Cemetery and Chapel — Perry, Fayette County, Pennsylvania
→1993Pulpit Rocks ★ NHL — Huntingdon, Huntingdon County, Pennsylvania
→1976Pusey-Crozier Mill Historic District — Upland, Delaware County, Pennsylvania
→1971Pusey, Caleb, House — Upland, Delaware County, Pennsylvania
→1985Pusey, Joshua, House — Coatesville, Chester County, Pennsylvania
→1987Qhandlery Corner — Erie, Erie County, Pennsylvania
→1988Quaker Bridge — Greenville, Mercer County, Pennsylvania
→2012Quaker City Dye Works — Philadelphia, Philadelphia County, Pennsylvania
→1976Quaker Manor House — Fort Washington, Montgomery County, Pennsylvania
→2011Quakertown Historic District — Quakertown, Bucks County, Pennsylvania
→2000Quakertown Passenger and Freight Station — Quakertown, Bucks County, Pennsylvania
→2003Quarries of the Hummelstown Brownstone Company — Derry Township, Dauphin County, Pennsylvania
→1975Quay, Matthew S., House ★ NHL — Beaver, Beaver County, Pennsylvania
→1997Quay, Rev. Anderson B., House — Dillsburg, York County, Pennsylvania
→2004Queen Anne Historic District — Reading, Berks County, Pennsylvania
→1973Quiet Valley Farm — Stroudsburg, Monroe County, Pennsylvania
→2020R. K. Laros Silk Mill — Bethlehem, Northampton County, Pennsylvania
→1992Rabb, Andrew, House — Masontown, Fayette County, Pennsylvania
→1993Race Street Friends Meetinghouse ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1987Racoon Creek RDA — Rochester, Beaver County, Pennsylvania
→1978Radnor Friends Meetinghouse — Ithan, Delaware County, Pennsylvania
→1980Rafsnyder-Welsh House — Philadelphia, Philadelphia County, Pennsylvania
→1984Railroad Borough Historic District — Railroad, York County, Pennsylvania
→1979Ralston Freeman Covered Bridge — Paris, Washington County, Pennsylvania
→1986Ralston, Robert, School — Philadelphia, Philadelphia County, Pennsylvania
→1986Ramcat Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1980Ramp Covered Bridge — Newburg, Cumberland County, Pennsylvania
→1986Ramsey, J. Sylvester, School — Philadelphia, Philadelphia County, Pennsylvania
→1972Randolph House — Philadelphia, Philadelphia County, Pennsylvania
→1973Rapps Bridge — Mont Clare, Chester County, Pennsylvania
→1987Ravensburg State Park — Loganton, Clinton County, Pennsylvania
→1979Raymond, Charles and Joseph, Houses — Middletown, Dauphin County, Pennsylvania
→1986Read, Thomas Buchanan, School — Philadelphia, Philadelphia County, Pennsylvania
→1982Reading Company Grain Elevator — Philadelphia, Philadelphia County, Pennsylvania
→1987Reading Furnace Historic District — Warwick, Chester County, Pennsylvania
→1997Reading Hardware Company — Reading, Berks County, Pennsylvania
→1979Reading Hardware Company Butt Works — Reading, Berks County, Pennsylvania
→1982Reading Knitting Mills — Reading, Berks County, Pennsylvania
→1992Reading Railroad Freight Station — Lewisburg, Union County, Pennsylvania
→1985Reading Railroad Passenger Station--Tamaqua — Tamaqua, Schuylkill County, Pennsylvania
→1984Reading Railroad Pottstown Station — Pottstown, Montgomery County, Pennsylvania
→1975Reading Railroad Station — Lebanon, Lebanon County, Pennsylvania
→1972Reading Terminal and Trainshed ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1980Reading-Halls Station Bridge — Muncy, Lycoming County, Pennsylvania
→1986Real Estate Building — Bangor, Northampton County, Pennsylvania
→1979Rebersburg Historic District — Rebersburg, Centre County, Pennsylvania
→1980Red Covered Bridge — Liverpool, Perry County, Pennsylvania
→1978Red Hill Church and School — Ottsville, Bucks County, Pennsylvania
→1985Red Hill Historic District — Red Hill, Montgomery County, Pennsylvania
→2000Red Lion Borough Historic District — Red Line, York County, Pennsylvania
→2000Red Men Hall — Reading, Berks County, Pennsylvania
→1980Red Run Covered Bridge — Terre Hill, Lancaster County, Pennsylvania
→1996Red Run Lodge — Rouzerville, Franklin County, Pennsylvania
→2018Red, Neils, Covered Bridge — Garads Fort, Greene County, Pennsylvania
→1980Reed Hall — Emsworth, Allegheny County, Pennsylvania
→1982Reed, Charles Manning, Mansion — Erie, Erie County, Pennsylvania
→1985Regent-Rennoc Court — Philadelphia, Philadelphia County, Pennsylvania
→1974Regester Log House — Fredericktown, Washington County, Pennsylvania
→1982Reiff Farm — Oley, Berks County, Pennsylvania
→1983Reilly Brothers and Raub Building — Lancaster, Lancaster County, Pennsylvania
→1990Reinholds Station Trinity Chapel — Reinholds, Lancaster County, Pennsylvania
→1995Reppert--Gabler House — Glassworks, Greene County, Pennsylvania
→1995Revloc Historic District — Revloc, Cambria County, Pennsylvania
→1980Rex Covered Bridge — Orefield, Lehigh County, Pennsylvania
→1980Rex House — Schaefferstown, Lebanon County, Pennsylvania
→1998Rex, John, Farm — Jefferson, Greene County, Pennsylvania
→2022Reyburn Manufacturing Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1996Reyer, Peter and Catherine, Farmhouse — Ephrata, Lancaster County, Pennsylvania
→1997Reymer Brothers Candy Factory — Pittsburgh, Allegheny County, Pennsylvania
→1967Reynolds-Morris House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1988Reynolds, Gen. John F., School — Philadelphia, Philadelphia County, Pennsylvania
→1996Rhoads Homestead — New Hope, Bucks County, Pennsylvania
→2007Rhoads--Lorah House and Barn — Amity Township, Berks County, Pennsylvania
→1985Rhone, Leonard, House — Centre, Centre County, Pennsylvania
→1980Rice Covered Bridge — Landisburg, Perry County, Pennsylvania
→1986Rice--Pennebecker Farm — Chester Springs, Chester County, Pennsylvania
→1992Rice's Landing Historic District — Rice's Landing, Greene County, Pennsylvania
→1985Rich-McCormick Woolen Factory — Woolrich, Clinton County, Pennsylvania
→1979Richards Covered Bridge — Elysburg, Northumberland County, Pennsylvania
→1985Richardson, Joseph, House — Langhorne, Bucks County, Pennsylvania
→1988Richmond School — Philadelphia, Philadelphia County, Pennsylvania
→1983Ricketts, Clemuel, Mansion — Lopez, Sullivan County, Pennsylvania
→1988Ridge Avenue Bridge in Philadelphia — Philadelphia, Philadelphia County, Pennsylvania
→1984Ridge Avenue Farmers' Market — Philadelphia, Philadelphia County, Pennsylvania
→1995Ridge Road Bridge, Stewartstown Railroad — Stewartstown, York County, Pennsylvania
→1992Ridge Valley Rural Historic District — Ottsville, Bucks County, Pennsylvania
→1992Ridgewood Farm — Seyfert, Berks County, Pennsylvania
→1989Ridgway Armory — Ridgway, Elk County, Pennsylvania
→2003Ridgway Historic District — Ridgway, Elk County, Pennsylvania
→1976Ridley Creek State Park — Media, Delaware County, Pennsylvania
→1979Riegel Covered Bridge No. 6 — Catawissa, Columbia County, Pennsylvania
→1987Riegel, Benjamin, House — Riegelsville, Bucks County, Pennsylvania
→1990Rieser Mill — Leesport, Berks County, Pennsylvania
→1992Rieser--Shoemaker Farm — Leesport, Berks County, Pennsylvania
→1973Rieth, Andreas, Homestead — Pennsburg, Montgomery County, Pennsylvania
→1978Ringgold Place — Philadelphia, Philadelphia County, Pennsylvania
→1996Ringland Tavern — Scenery Hill, Washington County, Pennsylvania
→1979Rishel Covered Bridge — Montandon, Northumberland County, Pennsylvania
→1990Risley, Dr. Samuel D., House — Media, Delaware County, Pennsylvania
→1983Rittenhouse Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2010Rittenhouse Historic District (Boundary Increase) — Philadelphia, Philadelphia County, Pennsylvania
→1981Rittenhouse Square — Philadelphia, Philadelphia County, Pennsylvania
→1996Rittenhouse, David, Junior High School — Norristown, Montgomery County, Pennsylvania
→1992RittenhouseTown Historic District ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1980River Bend Farm — Spring City, Chester County, Pennsylvania
→1985River Street Historic District — Wilkes-Barre, Luzerne County, Pennsylvania
→1988Riverside Farm — Erwinna, Bucks County, Pennsylvania
→1978Riverside Hotel — Cambridge Springs, Crawford County, Pennsylvania
→1995Roaring Spring Historic District — Roaring Spring, Blair County, Pennsylvania
→2011Robb Farm — Walker Township, Huntingdon County, Pennsylvania
→2005Roberts and Mander Stove Company Buildings — Hatboro, Montgomery County, Pennsylvania
→1975Roberts House — Canonsburg, Washington County, Pennsylvania
→1976Roberts-Quay House — Philadelphia, Philadelphia County, Pennsylvania
→1986Roberts, Enoch, House — Quakertown, Bucks County, Pennsylvania
→1992Robertsdale Historic District — Robertsdale, Huntingdon County, Pennsylvania
→2000Robeson, Paul, House — Philadelphia, Philadelphia County, Pennsylvania
→1991Robesonia Furnace Historic District — Robesonia, Berks County, Pennsylvania
→1977Robinson House — Wellsboro, Tioga County, Pennsylvania
→1991Robinson, Jesse, House — Wellsboro, Tioga County, Pennsylvania
→2000Rock Creek--White Run Union Hospital Complex — Mount Joy, Adams County, Pennsylvania
→1999Rock Hill Farm — Mercersburg, Franklin County, Pennsylvania
→1991Rockland Furnace — Emlenton, Venango County, Pennsylvania
→1975Rockville Bridge — Marysville, Dauphin County, Pennsylvania
→1994Rocky Spring Presbyterian Church — Chambersburg, Franklin County, Pennsylvania
→1999Rodale Organic Gardening Experimental Farm — Lower Macungie township, Lehigh County, Pennsylvania
→1979Rodef Shalom Temple — Pittsburgh, Allegheny County, Pennsylvania
→2007Rodeph Shalom Synagogue — Philadelphia, Philadelphia County, Pennsylvania
→1976Roebling, John, House — Saxonburg, Butler County, Pennsylvania
→1973Rogers, Philip, House — Warwick Township, Chester County, Pennsylvania
→2007Rohm and Haas Corporate Headquarters — Philadelphia, Philadelphia County, Pennsylvania
→1979Rohrbach Covered Bridge No. 24 — Catawissa, Columbia County, Pennsylvania
→1980Romberger-Stover House — Berrysburg, Dauphin County, Pennsylvania
→1973Rooke, Robert, House — Downingtown, Chester County, Pennsylvania
→1988Roosevelt, Theodore, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→2010Rose Valley Historic District — Rose Valley Borough, Delaware County, Pennsylvania
→1978Ross Common Manor — Saylorsburg, Monroe County, Pennsylvania
→1991Ross Furnace — West Fairfield, Westmoreland County, Pennsylvania
→2002Ross, Frank L., Farm — North Bethlehem, Washington County, Pennsylvania
→1985Ross, Moses, House — Doe Run Valley, Chester County, Pennsylvania
→1973Rotunda of the Pennsylvania Railroad Station — Pittsburgh, Allegheny County, Pennsylvania
→1982Roueche House — Meadville, Crawford County, Pennsylvania
→1984Roughwood — Devon, Chester County, Pennsylvania
→1988Rowen, William, School — Philadelphia, Philadelphia County, Pennsylvania
→1979Rowland House — Cheltenham, Montgomery County, Pennsylvania
→1979Rowland Theater — Philipsburg, Centre County, Pennsylvania
→1980Royal Theater — Philadelphia, Philadelphia County, Pennsylvania
→1976Royer-Nicodemus House and Farm — Waynesboro, Franklin County, Pennsylvania
→1975Royer, Daniel, House — Williamsburg, Blair County, Pennsylvania
→1985Ruan, John, House — Philadelphia, Philadelphia County, Pennsylvania
→2022Rudolph and Arthur Covered Bridge — West Grove, Chester County, Pennsylvania
→1990Runk Bridge — Shirleysburg, Huntingdon County, Pennsylvania
→1979Rupert Covered Bridge No. 56 — Rupert, Columbia County, Pennsylvania
→1978Rush House — Farmington, Fayette County, Pennsylvania
→1984Rush, Benjamin, House — Kirkland, Chester County, Pennsylvania
→1979Russell House — Bedford, Bedford County, Pennsylvania
→1978Ruter Hall — Meadville, Crawford County, Pennsylvania
→1976Ryerss Mansion — Philadelphia, Philadelphia County, Pennsylvania
→1977Ryon, Judge John, House — Lawrenceville, Tioga County, Pennsylvania
→1980Ryot Covered Bridge — Fishertown, Bedford County, Pennsylvania
→1988S Bridge — Sheridan, Berks County, Pennsylvania
→2023S.L. Allen & Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1980Saeger, Edward, House — Saegertown, Crawford County, Pennsylvania
→1978Salem Crossroads Historic District — Delmont, Westmoreland County, Pennsylvania
→2010Salem Evangelical Lutheran Church — Lebanon, Lebanon County, Pennsylvania
→1975Salem United Church of Christ — Harrisburg, Dauphin County, Pennsylvania
→1976Sally Ann Furnace Complex — Topton, Berks County, Pennsylvania
→1992Saltsburg Historic District — Saltsburg, Indiana County, Pennsylvania
→2016Salvation Army Building, The — Pittsburgh, Allegheny County, Pennsylvania
→2004Sanatoga Union Sunday School — Lower Pottsgrove township, Montgomery County, Pennsylvania
→2021Sandoz Chemical Works — Philadelphia, Philadelphia County, Pennsylvania
→1980Sandy Hill Tavern — Honey Brook, Chester County, Pennsylvania
→1977Sansom Row — Philadelphia, Philadelphia County, Pennsylvania
→1978Saturday Club — Wayne, Delaware County, Pennsylvania
→1980Sauck's Covered Bridge — Gettysburg, Adams County, Pennsylvania
→1985Sauer Buildings Historic District — Aspinwall, Allegheny County, Pennsylvania
→1980Saville Covered Bridge — Saville, Perry County, Pennsylvania
→1979Sawhill Covered Bridge — Taylorstown, Washington County, Pennsylvania
→2003Saxonburg Historic District — Saxonburg, Butler County, Pennsylvania
→1996Scenery Hill Historic District — Scenery Hill, Washington County, Pennsylvania
→2011Schaeffer House ★ NHL — Schaefferstown, Heidelberg Township, Lebanon County, Pennsylvania
→1986Schaeffer, Charles, School — Philadelphia, Philadelphia County, Pennsylvania
→2007Schall, William and Caroline, House — Green Line, Montgomery County, Pennsylvania
→1979Schaumboch's Tavern — Hamburg, Berks County, Pennsylvania
→2001Schellsburg Historic District — Schellsburg Borough, Bedford County, Pennsylvania
→1983Schenley Farms Historic District — Pittsburgh, Allegheny County, Pennsylvania
→2012Schenley Farms Historic District (Boundary Increase) — Pittsburgh, Allegheny County, Pennsylvania
→1986Schenley High School — Pittsburgh, Allegheny County, Pennsylvania
→1985Schenley Park — Pittsburgh, Allegheny County, Pennsylvania
→1985Scherer, Frank C., Wagon Works — Philadelphia, Philadelphia County, Pennsylvania
→1986Schiller Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1992Schlegel, Christian, Farm — Fleetwood, Berks County, Pennsylvania
→1980Schlicher Covered Bridge — Allentown, Lehigh County, Pennsylvania
→1992Schlicher, George F., Hotel — Alburtis, Lehigh County, Pennsylvania
→2021Schlichter Jute Cordage Company — Philadelphia, Philadelphia County, Pennsylvania
→1990Schnader, R. K. & Sons, Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1990Schnader, Walter, Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→2014Schoettle, Edwin J., Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1979Schoonover Mountain House — Bushkill, Monroe County, Pennsylvania
→2011Schrot, Joseph F. and Anna B., Farm — Hyde, Clearfield County, Pennsylvania
→2019Schubert-Graber Log-Post Shop — Zionsville, Lehigh County, Pennsylvania
→1993Schultz, Martin, House — Hallam, York County, Pennsylvania
→1978Schuylkill County Bridge No. 113 — Rock, Schuylkill County, Pennsylvania
→1978Schuylkill County Bridge No. 114 — Rock, Schuylkill County, Pennsylvania
→1988Schuylkill Navigation Canal, Oakes Reach Section — Phoenixville, Chester County, Pennsylvania
→1979Scott Covered Bridge — Rogersville, Greene County, Pennsylvania
→1995Scott Creek Bridge--North, Maryland and Pennsylvania Railroad — Bryansville, York County, Pennsylvania
→1985Scott, David, House — Coatesville, Chester County, Pennsylvania
→1997Scott, James, House — Pittsburgh, Allegheny County, Pennsylvania
→1985Scott, Thomas, House — Coatesville, Chester County, Pennsylvania
→1991Scottdale Armory — Scottdale, Westmoreland County, Pennsylvania
→1996Scottdale Historic District — Scottdale, Westmoreland County, Pennsylvania
→2008Scottish Rite Cathedral — New Castle, Lawrence County, Pennsylvania
→1989Scranton Armory — Scranton, Lackawanna County, Pennsylvania
→2011Scranton Chamber of Commerce Building — Scranton, Lackawanna County, Pennsylvania
→2023Scranton Electric Building — Scranton, Lackawanna County, Pennsylvania
→2012Scranton Lace Company — Scranton, Lackawanna County, Pennsylvania
→2009Search, George W., House — Shickshinny, Luzerne County, Pennsylvania
→1973Searight's Fulling Mill — Perryopolis, Fayette County, Pennsylvania
→1966Searights Tollhouse, National Road ★ NHL — Uniontown, Fayette County, Pennsylvania
→1987Second Bank of the United States ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2002Second National Bank of Meyersdale — Meyersdale, Somerset County, Pennsylvania
→1988Second Street Bridge — Chester, Delaware County, Pennsylvania
→1999Seeds, Hugh D. and Martha S., Farm — Tyrone, Huntingdon County, Pennsylvania
→1980Seel, William, Building — Harrisburg, Dauphin County, Pennsylvania
→2000Segers, Redferd, House — Snyder Township, Jefferson County, Pennsylvania
→1980Seigrist's Mill Covered Bridge — Columbia, Lancaster County, Pennsylvania
→1977Seipsville Hotel — Easton, Northampton County, Pennsylvania
→1979Selinsgrove Hall and Seibert Hall — Selinsgrove, Snyder County, Pennsylvania
→2018Sellers Hall — Upper Darby Township, Delaware County, Pennsylvania
→1979Sellers House — Pittsburgh, Allegheny County, Pennsylvania
→1967Seventeen-hundred-and-four House ★ NHL — Dilworthtown, Delaware County, Pennsylvania
→1986Seventh Street Bridge — Pittsburgh, Allegheny County, Pennsylvania
→2005Seville Theatre — Lower Merion Township, Montgomery County, Pennsylvania
→1982Sewickley Manor — United, Westmoreland County, Pennsylvania
→1990Seyfert Mill — Strausstown, Berks County, Pennsylvania
→1987Seymour, Edward B., House — Philadelphia, Philadelphia County, Pennsylvania
→1990Shade Gap Feed and Flour Mill — Shade Gap, Huntingdon County, Pennsylvania
→1975Shadyside Presbyterian Church — Pittsburgh, Allegheny County, Pennsylvania
→1980Shaffer's Bridge — Tire Hill, Somerset County, Pennsylvania
→1985Sharples Homestead — West Chester, Chester County, Pennsylvania
→1984Sharples Separator Works — West Chester, Chester County, Pennsylvania
→2011Sharpless Homestead — West Chester, Chester County, Pennsylvania
→1983Sharpless, William C., House — Philadelphia, Philadelphia County, Pennsylvania
→1988Sharswood, George, School — Philadelphia, Philadelphia County, Pennsylvania
→1979Shaw Historic District — Doylestown, Bucks County, Pennsylvania
→1988Shaw, Anna Howard, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1976Sheads House — Gettysburg, Adams County, Pennsylvania
→2006Sheard, Levi, Mill — East Rockhill Township, Bucks County, Pennsylvania
→1980Sheard's Mill Covered Bridge — Richardtown, Bucks County, Pennsylvania
→1980Shearer's Covered Bridge — Manheim, Lancaster County, Pennsylvania
→1982Shedwick, John, Development Houses — Philadelphia, Philadelphia County, Pennsylvania
→1990Sheffield Apartments — Harrisburg, Dauphin County, Pennsylvania
→2011Shelly School — Richland Township, Bucks County, Pennsylvania
→2001Shelly, William, School and Annex — West York Borough, York County, Pennsylvania
→1978Shelter House — Emmaus, Lehigh County, Pennsylvania
→1980Shenk's Mill Covered Bridge — Manheim, Lancaster County, Pennsylvania
→1988Sheridan, Philip H., School — Philadelphia, Philadelphia County, Pennsylvania
→1990Sherman, L. G., Tobacco Warehouse — Lancaster, Lancaster County, Pennsylvania
→1975Shields, David, House — Edgeworth, Allegheny County, Pennsylvania
→1984Ship Inn — Exton, Chester County, Pennsylvania
→1975Shippen House — Shippensburg, Cumberland County, Pennsylvania
→1984Shippen, Judge Henry, House — Meadville, Crawford County, Pennsylvania
→1984Shippensburg Historic District — Shippensburg, Cumberland County, Pennsylvania
→1994Shoaf Historic District — Shoaf, Fayette County, Pennsylvania
→1979Shoemaker Covered Bridge — Iola, Columbia County, Pennsylvania
→1979Shoemaker, Capt. Jacob, House — Bushkill, Monroe County, Pennsylvania
→1986Shoemaker, William, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1997Shohola Glen Hotel — Shohola, Pike County, Pennsylvania
→1983Short's Hotel — North East, Erie County, Pennsylvania
→2023Shrawder-Sittig House — Smithfield Township, Monroe County, Pennsylvania
→1994Shreiner Farm — Lancaster, Lancaster County, Pennsylvania
→1984Shrewsbury Historic District — Shrewsbury, York County, Pennsylvania
→1995Shrewsbury Railroad Station, Stewartstown Railroad — Shrewsbury, York County, Pennsylvania
→1979Shriver Covered Bridge — Rogersville, Greene County, Pennsylvania
→1984Siegfried's Dale Farm — Maxatawny, Berks County, Pennsylvania
→1978Silkman House — Scranton, Lackawanna County, Pennsylvania
→1975Silver Lake Bank — Montrose, Susquehanna County, Pennsylvania
→1980Simon, Herman, House — Easton, Northampton County, Pennsylvania
→1983Simpson Street School — Mechanicsburg, Cumberland County, Pennsylvania
→1974Singer, John F., House — Pittsburgh, Allegheny County, Pennsylvania
→2000Sinking Springs Farms — Manchester, York County, Pennsylvania
→1980Sinnott, Joseph, Mansion — Rosemont, Montgomery County, Pennsylvania
→1979Sixteenth Street Bridge — Pittsburgh, Allegheny County, Pennsylvania
→1986Sixth Street Bridge — Pittsburgh, Allegheny County, Pennsylvania
→2005Skinner Tavern — Letterkenny Township, Franklin County, Pennsylvania
→1970Skippack Bridge — Evansburg, Montgomery County, Pennsylvania
→1992Slate Hill Cemetery — Morrisville, Bucks County, Pennsylvania
→1990Slater Cigar Company — Lancaster, Lancaster County, Pennsylvania
→2004Slatington Historic District — Slatington, Lehigh County, Pennsylvania
→1984Sleepy Hollow Hall — West Whiteland, Chester County, Pennsylvania
→1994Slickville Historic District — Slickville, Westmoreland County, Pennsylvania
→1975Slifer House — Lewisburg, Union County, Pennsylvania
→1978Smalley, Lewis, Homestead — Allenport, Huntingdon County, Pennsylvania
→2005Smaltz Building — Phiadelphia, Philadelphia County, Pennsylvania
→1988Smedley, Franklin, School — Philadelphia, Philadelphia County, Pennsylvania
→1978Smith Family Farmstead — New Hope, Bucks County, Pennsylvania
→1988Smith, Henry, Farm — Middletown, Dauphin County, Pennsylvania
→1986Smith, Walter George, School — Philadelphia, Philadelphia County, Pennsylvania
→1977Smith, William, House — Wrightstown, Bucks County, Pennsylvania
→1974Smithfield Street Bridge ★ NHL — Pittsburgh, Allegheny County, Pennsylvania
→1994Smock Historic District — Smock, Fayette County, Pennsylvania
→2002Smyser and English Pharmacy — Philadelphia, Philadelphia County, Pennsylvania
→1986Snellenburg's Clothing Factory — Philadelphia, Philadelphia County, Pennsylvania
→1980Snooks Covered Bridge — Alum Bank, Bedford County, Pennsylvania
→1979Snyder Covered Bridge No. 17 — Slabtown, Columbia County, Pennsylvania
→1990Snyder Mill — Limekiln, Berks County, Pennsylvania
→1978Snyder, Caspar, House — Sunbury, Northumberland County, Pennsylvania
→1978Snyder, Gov. Simon, Mansion — Selinsgrove, Snyder County, Pennsylvania
→1976Snyder, William Penn, House — Pittsburgh, Allegheny County, Pennsylvania
→2002Social Service Building — Philadelphia, Philadelphia County, Pennsylvania
→1971Society Hill Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1974Sodom Schoolhouse — Montandon, Northumberland County, Pennsylvania
→1988Soldiers and Sailors Memorial Bridge — Harrisburg, Dauphin County, Pennsylvania
→1974Soldiers and Sailors Memorial Hall — Pittsburgh, Allegheny County, Pennsylvania
→1973Soldiers and Sailors Monument — Lancaster, Lancaster County, Pennsylvania
→1984Solitude Farm — West Whiteland, Chester County, Pennsylvania
→1978Solomon House — Philadelphia, Philadelphia County, Pennsylvania
→1980Somerset County Courthouse — Somerset, Somerset County, Pennsylvania
→1980Sonestown Covered Bridge — Sonestown, Sullivan County, Pennsylvania
→1977Sotcher Farmhouse — Fairless Hills, Bucks County, Pennsylvania
→2011Souderton Historic District — Souderton, Montgomery County, Pennsylvania
→2006South Bethlehem Downtown Historic District — Bethlehem, Northampton County, Pennsylvania
→1991South Brook Farm — London Grove, Chester County, Pennsylvania
→1986South Fork Fishing and Hunting Club Historic District — St. Michael, Cambria County, Pennsylvania
→1972South Front Street Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1980South Perkasie Covered Bridge — Perkasie, Bucks County, Pennsylvania
→1995South Road Bridge, Northern Central Railway — Larue, York County, Pennsylvania
→1986South Side High School — Pittsburgh, Allegheny County, Pennsylvania
→1976South Side Market Building — Pittsburgh, Allegheny County, Pennsylvania
→1986South Tenth Street Bridge — Pittsburgh, Allegheny County, Pennsylvania
→1978South Ward School — Bellefonte, Centre County, Pennsylvania
→1991South Wayne Historic District — Wayne, Delaware County, Pennsylvania
→1980South, George W., Memorial Protestant Episcopal Church of the Advocate ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1978Southampton Baptist Church and Cemetery — Southampton, Bucks County, Pennsylvania
→1972Southwark District — Philadelphia, Philadelphia County, Pennsylvania
→1986Southwark School — Philadelphia, Philadelphia County, Pennsylvania
→2000Spalding Memorial Library--Tioga Point Museum — Athens, Bradford County, Pennsylvania
→1992Spangler--Benner Farm — Gettysburg, Adams County, Pennsylvania
→1990Spannuth Mill — Frystown, Berks County, Pennsylvania
→1980Speakman No. 1 — Modena, Chester County, Pennsylvania
→1980Speakman No. 2, Mary Ann Pyle Bridge — Modena, Chester County, Pennsylvania
→1991Special Troops Armory — Philadelphia, Philadelphia County, Pennsylvania
→2006Speedwell Forge Mansion — Elizabeth Township, Lancaster County, Pennsylvania
→2005Sperling Building — Wilkinsburg, Allegheny County, Pennsylvania
→1983Spicker, Peter, House — Stouchsburg, Berks County, Pennsylvania
→1979Spinner House — Spinnerstown, Bucks County, Pennsylvania
→1979Sprenger Brewery — Lancaster, Lancaster County, Pennsylvania
→1978Spring Garden District — Philadelphia, Philadelphia County, Pennsylvania
→1983Spring Garden District (Boundary Increase) — Philadelphia, Philadelphia County, Pennsylvania
→1986Spring Garden School No. 1 — Philadelphia, Philadelphia County, Pennsylvania
→1986Spring Garden School No. 2 — Philadelphia, Philadelphia County, Pennsylvania
→1984Spring Grove Borough Historic District — Spring Grove, York County, Pennsylvania
→1979Spring Grove Farm and Distillery — Greencastle, Franklin County, Pennsylvania
→1984Spring Grove Forge Mansion — East Earl, Lancaster County, Pennsylvania
→1978Spring Mill Complex — Devault, Chester County, Pennsylvania
→1988Spring Valley Historic District — Buckingham, Bucks County, Pennsylvania
→1973Springdale Farm — Mendenhall, Chester County, Pennsylvania
→2001Springdale Historic District — York, York County, Pennsylvania
→1985Springdale Historic District — New Hope, Bucks County, Pennsylvania
→1975Springdale Mills — Waynesboro, Franklin County, Pennsylvania
→1982Springer Farm — North Union, Fayette County, Pennsylvania
→1976Springfield Mill — Erdenheim, Montgomery County, Pennsylvania
→1986Springfield Public School — Pittsburgh, Allegheny County, Pennsylvania
→2007Springhouse Farm — Springfield, Bucks County, Pennsylvania
→1979Springton Manor Farm — Glenmoore, Chester County, Pennsylvania
→2008Springtown Historic District — Springtown, Bucks County, Pennsylvania
→1979Sprowl's Covered Bridge — West Finley, Washington County, Pennsylvania
→1991Spruce Creek Rod and Gun Club — Franklinville, Huntingdon County, Pennsylvania
→1985Spruce Grove School — Newlin Twp., Chester County, Pennsylvania
→1984Square Tavern — Newtown Square, Delaware County, Pennsylvania
→1999SS UNITED STATES (Steamship) — Philadelphia, Philadelphia County, Pennsylvania
→1992St. Anthony de Padua Parish School — Philadelphia, Philadelphia County, Pennsylvania
→2005St. Anthony Hall House — Philadelphia, Philadelphia County, Pennsylvania
→1976St. Augustine's Catholic Church — Philadelphia, Philadelphia County, Pennsylvania
→1981St. Boniface Roman Catholic Church — Pittsburgh, Allegheny County, Pennsylvania
→1970St. Clement's Protestant Episcopal Church — Philadelphia, Philadelphia County, Pennsylvania
→1978St. David's Church and Graveyard — Media, Delaware County, Pennsylvania
→1978St. Elizabeth's Convent — Cornwells Heights, Bucks County, Pennsylvania
→2002St. Gabriel's Catholic Parish Complex — Hazleton, Luzerne County, Pennsylvania
→1978St. Gabriel's Episcopal Church, Old — Douglassville, Berks County, Pennsylvania
→2021St. Gabriel’s Roman Catholic Church Complex — Philadelphia, Philadelphia County, Pennsylvania
→1971St. George's Methodist Church — Philadelphia, Philadelphia County, Pennsylvania
→1983St. Gertrude Roman Catholic Church — Vandergrift, Westmoreland County, Pennsylvania
→1979St. James Episcopal Church — Muncy, Lycoming County, Pennsylvania
→1976St. James Hotel — Philadelphia, Philadelphia County, Pennsylvania
→1974St. John the Baptist Ukranian Catholic Church — Pittsburgh, Allegheny County, Pennsylvania
→2003St. John the Evangelist Roman Catholic Church and School Building — Wilkes-Barre, Luzerne County, Pennsylvania
→1983St. John's Church — Philadelphia, Philadelphia County, Pennsylvania
→1978St. John's Evangelical Lutheran Church — Culp, Blair County, Pennsylvania
→1996St. Joseph's House for Homeless Industrious Boys — Philadelphia, Philadelphia County, Pennsylvania
→2018St. Joseph's Parish Complex — Collingdale, Delaware County, Pennsylvania
→1974St. Lukes Episcopal Church — Lebanon, Lebanon County, Pennsylvania
→1982St. Mark's Episcopal Church ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1977St. Mark's Episcopal Church ★ NHL — Jim Thorpe, Carbon County, Pennsylvania
→1980St. Mary's Covered Bridge — Orbisonia, Huntingdon County, Pennsylvania
→1996St. Mary's Episcopal Church — Elverson, Chester County, Pennsylvania
→1998St. Marys Historic District — St. Marys, Elk County, Pennsylvania
→1982St. Michael's Protestant Episcopal Church, Parish House and Rectory — Birdsboro, Berks County, Pennsylvania
→1985St. Milachi Church — Londonderry Twp., Chester County, Pennsylvania
→1997St. Nicholas Byzantine Catholic Church — Perryopolis, Fayette County, Pennsylvania
→1980St. Nicholas Croatian Church — Millvale, Allegheny County, Pennsylvania
→1978St. Patrick's Roman Catholic Church — Cowansville, Armstrong County, Pennsylvania
→2012St. Paul African Methodist Episcopal Church — Coatesville, Chester County, Pennsylvania
→1984St. Paul's Church — Exton, Chester County, Pennsylvania
→1982St. Paul's Episcopal Church — Elkins Park, Montgomery County, Pennsylvania
→1995St. Paul's Union Church and Cemetery — Ringtown, Schuylkill County, Pennsylvania
→1976St. Peter's Cathedral Complex — Scranton, Lackawanna County, Pennsylvania
→1980St. Peter's Church — Brownsville, Fayette County, Pennsylvania
→1996St. Peter's Church ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1977St. Peter's Church in the Great Valley — Phoenixville, Chester County, Pennsylvania
→1988St. Peter's Episcopal Church and Rectory — Blairsville, Indiana County, Pennsylvania
→1985St. Peter's Episcopal Church of Germantown — Philadelphia, Philadelphia County, Pennsylvania
→1973St. Peter's Kierch — Middletown, Dauphin County, Pennsylvania
→2003St. Peters Village Historic District — St Peters, Chester County, Pennsylvania
→1975St. Severin's Old Log Church — Cooper Settlement, Clearfield County, Pennsylvania
→2008St. Stanislaus Institute — Newport Township, Luzerne County, Pennsylvania
→1972St. Stanislaus Kostka Roman Catholic Church — Pittsburgh, Allegheny County, Pennsylvania
→1980St. Stephen's Church — Bradys Bend, Armstrong County, Pennsylvania
→1979St. Stephen's Episcopal Church — Philadelphia, Philadelphia County, Pennsylvania
→2016St. Thomas Memorial Church — Oakmont Borough, Allegheny County, Pennsylvania
→1978St. Vincent Archabbey Gristmill — Latrobe, Westmoreland County, Pennsylvania
→2005Stanley — Abington Township, Montgomery County, Pennsylvania
→1986Stanley Theater and Clark Building — Pittsburgh, Allegheny County, Pennsylvania
→1988Stanton, Edwin M., School — Philadelphia, Philadelphia County, Pennsylvania
→2018Stanton, M. Hall, Public School — Philadelphia, Philadelphia County, Pennsylvania
→1994Staple Bend Tunnel ★ NHL — Conemaugh Township, Cambria County, Pennsylvania
→2000Star Barn Complex — Lower Swatara, Dauphin County, Pennsylvania
→2023Star Carpet Mill — Philadelphia, Philadelphia County, Pennsylvania
→1997Star Junction Historic District — Perry, Fayette County, Pennsylvania
→2001Starlight Station, New York, Ontario, and Western Railway — Buckingham Township, Wayne County, Pennsylvania
→1975Starrucca Viaduct — Lanesboro, Susquehanna County, Pennsylvania
→1977State Capitol Building, Pennsylvania ★ NHL — Harrisburg, Dauphin County, Pennsylvania
→1982State Theatre — Easton, Northampton County, Pennsylvania
→1986Stauffer, Christian, House — Lancaster, Lancaster County, Pennsylvania
→1979Stauffer, Dr. B., House — Campbelltown, Lebanon County, Pennsylvania
→1986Steamtown National Historic Site — Scanton, Lackawanna County, Pennsylvania
→1982Steckel, Daniel, House — Bath, Northampton County, Pennsylvania
→2010Steel Heddle Manufacturing Company Complex — Philadelphia, Philadelphia County, Pennsylvania
→1979Steel Hopper Car No. 33164 — Strasburg, Lancaster County, Pennsylvania
→1979Steel Passenger Coach No. 1650 — Strasburg, Lancaster County, Pennsylvania
→1979Steel Passenger Coach No. 1651 — Strasburg, Lancaster County, Pennsylvania
→2011Steelton High School — Steelton Borough, Dauphin County, Pennsylvania
→1985Steen, Robert, House — Coatesville, Chester County, Pennsylvania
→1979Stegmaier Brewery — Wilkes-Barre, Luzerne County, Pennsylvania
→1990Stein Mill — Kutztown, Berks County, Pennsylvania
→1979Steinman Hardware Store — Lancaster, Lancaster County, Pennsylvania
→1966Stenton ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→2002Stephenson--Campbell House — Cecil, Washington County, Pennsylvania
→1986Sterrett Sub-District School — Pittsburgh, Allegheny County, Pennsylvania
→1975Stevens Hall, Gettysburg College — Gettysburg and vicinity, Adams County, Pennsylvania
→1983Stevens High School — Lancaster, Lancaster County, Pennsylvania
→1983Stevens School — York, York County, Pennsylvania
→1980Stevens, Linton, Covered Bridge — New London, Chester County, Pennsylvania
→1986Stevens, Thaddeus, School of Observation — Philadelphia, Philadelphia County, Pennsylvania
→1991Stewart, Gen. Thomas J., Memorial Armory — Norristown, Montgomery County, Pennsylvania
→1979Stewart, John, Houses — Philadelphia, Philadelphia County, Pennsylvania
→1995Stewartstown Engine House, Stewartstown Railroad — Stewartstown, York County, Pennsylvania
→1995Stewartstown Railroad Station — Stewartstown, York County, Pennsylvania
→1966Stiegel-Coleman House ★ NHL — Brickerville, Lancaster County, Pennsylvania
→1979Stillwater Covered Bridge No. 134 — Stillwater, Columbia County, Pennsylvania
→1980Stirling — Reading, Berks County, Pennsylvania
→1974Stirling, Maj. Gen. Lord, Quarters — Valley Forge, Chester County, Pennsylvania
→1998Stoddartsville Historic District — Buck Township, Luzerne County, Pennsylvania
→2019Stoehr and Fister Building — Scranton, Lackawanna County, Pennsylvania
→1987Stoever, John Casper, Log House — New Holland, Lancaster County, Pennsylvania
→1995Stone Arch Road Bridge, Stewartstown Railroad — Railroad, York County, Pennsylvania
→1996Stonehaven — Media, Delaware County, Pennsylvania
→1976Stoner, Samuel, Homestead — York, York County, Pennsylvania
→1975Stonorov, Oskar G., House — Phoenixville, Chester County, Pennsylvania
→1985Stotesbury Club House — Wyndmoor, Montgomery County, Pennsylvania
→1985Stouchsburg Historic District — Stouchsburg, Berks County, Pennsylvania
→2004Stout, Isaac, House — Williams, Northampton County, Pennsylvania
→1979Stover Mill — Erwinna, Bucks County, Pennsylvania
→1978Stover-Myers Mill — Pipersville, Bucks County, Pennsylvania
→1979Stover-Winger Farm — Greencastle, Franklin County, Pennsylvania
→1990Stover, Isaac, House — Erwinna, Bucks County, Pennsylvania
→2019Stover, Jacob, Farmstead — Upper Black Eddy, Bucks County, Pennsylvania
→2001Stoystown Historic District — Stoystown Borough, Somerset County, Pennsylvania
→1984Strafford Railroad Station — Strafford, Chester County, Pennsylvania
→1983Strasburg Historic District — Strasburg, Lancaster County, Pennsylvania
→2017Strassburger, Reuben and Elizabeth, Farmstead — Sellersville, Bucks County, Pennsylvania
→2018Strawbridge and Clothier Department Store Warehouse — Philadelphia, Philadelphia County, Pennsylvania
→1988Strawbridge and Clothier Store — Jenkintown, Montgomery County, Pennsylvania
→1978Strickland-Roberts Homestead — Kimberton, Chester County, Pennsylvania
→1977Strickland, William, Row — Philadelphia, Philadelphia County, Pennsylvania
→1991Strickler Family Farmhouse — York, York County, Pennsylvania
→1971Strode's Mill — West Chester, Chester County, Pennsylvania
→1989Strode's Mill Historic District — West Chester, Chester County, Pennsylvania
→1979Stroud Mansion — Stroudsburg, Monroe County, Pennsylvania
→1975Struthers Library Building — Warren, Warren County, Pennsylvania
→1992Stupp--Oxenrider Farm — Robesonia, Berks County, Pennsylvania
→1980Sturgeon House — Fairview, Erie County, Pennsylvania
→1974Sturgis, Julius, Pretzel House — Lititz, Lancaster County, Pennsylvania
→1985Suburban Station Building — Philadelphia, Philadelphia County, Pennsylvania
→2002Suffolk Manor Apartments — Philadelphia, Philadelphia County, Pennsylvania
→1984Sugartown Historic District — Malvern, Chester County, Pennsylvania
→1978Sullivan County Courthouse — Laporte, Sullivan County, Pennsylvania
→1988Sullivan, James J., School — Philadelphia, Philadelphia County, Pennsylvania
→1966Sully, Thomas, Residence ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1988Sulzberger, Mayer, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1991Summers, Lewis, Farm — Ottsville, Bucks County, Pennsylvania
→1971Summerseat ★ NHL — Morrisville, Bucks County, Pennsylvania
→2001Summit Hill High School — Summit Hill, Carbon County, Pennsylvania
→2005Summit Hotel — North Union, Fayette County, Pennsylvania
→1983Sun Oil Building — Philadelphia, Philadelphia County, Pennsylvania
→1989Sunbury Armory — Sunbury, Northumberland County, Pennsylvania
→1983Sunbury Historic District — Sunbury, Northumberland County, Pennsylvania
→2005Sunnybrook — Lower Pottsgrove Township, Montgomery County, Pennsylvania
→1977Sunrise Mill — Schwenksville, Montgomery County, Pennsylvania
→1996Susquehanna County Courthouse Complex — Montrose, Susquehanna County, Pennsylvania
→1988Sutch Road Bridge in Marlborough Township — Milford, Montgomery County, Pennsylvania
→1982Sutter, Johann Agust, House — Lititz, Lancaster County, Pennsylvania
→2004Sutton--Ditz House — Clarion, Clarion County, Pennsylvania
→1975Sutton, John, Hall — Indiana, Indiana County, Pennsylvania
→1988Swamp Creek Road Bridge — Sumneytown, Montgomery County, Pennsylvania
→2020Swarr, John and Elizabeth, House — Manheim Township, Lancaster County, Pennsylvania
→1976Swatara Ferry House — Middletown, Dauphin County, Pennsylvania
→1991Swatara Furnace — Suedberg, Schuylkill County, Pennsylvania
→2005Swedish Lutheran Parsonage — Jones Township, Elk County, Pennsylvania
→1978Swetland Homestead — Wyoming, Luzerne County, Pennsylvania
→1980Swigart's Mill — Hanover, York County, Pennsylvania
→1979Switcher No. 1670 — Strasburg, Lancaster County, Pennsylvania
→1979Switcher No. 94 — Strasburg, Lancaster County, Pennsylvania
→2020Sykes Brothers Yarn Mill (Additional Documentation) — Philadelphia, Philadelphia County, Pennsylvania
→1987Tabor Home for Needy and Destitute Children — Doylestown, Bucks County, Pennsylvania
→1980Tabor Reformed Church — Lebanon, Lebanon County, Pennsylvania
→1990Tacony Music Hall — Philadelphia, Philadelphia County, Pennsylvania
→2001Tamaqua Historic District — Tamaqua, Schuylkill County, Pennsylvania
→1976Tanner, Henry O., House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1972Tannery, The — Bethlehem, Northampton County, Pennsylvania
→2011Tasty Baking Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1979Taylor House — Marshallton, Chester County, Pennsylvania
→1987Taylor--Cope Historic District — Marshallton, Chester County, Pennsylvania
→1988Taylor, Bayard, School — Philadelphia, Philadelphia County, Pennsylvania
→1975Taylor, Benjamin, Homestead — Newtown, Bucks County, Pennsylvania
→1971Taylor, George, House ★ NHL — Catasauqua, Lehigh County, Pennsylvania
→1989Taylor, Peter, Farmstead — Newtown, Bucks County, Pennsylvania
→1982Taylor, Phillip, House — Brookville, Jefferson County, Pennsylvania
→1985Taylorstown Historic District — Taylorstown, Washington County, Pennsylvania
→1990Teller Brothers--Reed Tobacco Historic District — Lancaster, Lancaster County, Pennsylvania
→1987Teller Cigar Factory — Sellersville, Bucks County, Pennsylvania
→2016Temple Ohave Israel — Brownsville Borough, Fayette County, Pennsylvania
→1973Temple-Webster-Stoner House — Romansville, Chester County, Pennsylvania
→1996Terminal Commerce Building — Philadelphia, Philadelphia County, Pennsylvania
→1978Terracina — Coatesville, Chester County, Pennsylvania
→2004Teutonia Maennerchor Hall — Pittsburgh, Allegheny County, Pennsylvania
→1970Thaddeus Kosciuszko National Memorial — Philadelphia, Philadelphia County, Pennsylvania
→1985Thayer--Thompson House — Erie, Erie County, Pennsylvania
→1996The Elverson Building — Philadelphia, Philadelphia County, Pennsylvania
→2019Third Presbyterian Church — Chester, Delaware County, Pennsylvania
→1978Thirtieth Street Station — Philadelphia, Philadelphia County, Pennsylvania
→1988Thirty-third Street Bridge in Philadelphia — Philadelphia, Philadelphia County, Pennsylvania
→2008Thomas Brothers Store — Biglerville, Adams County, Pennsylvania
→1979Thomas Covered Bridge — Creekside, Indiana County, Pennsylvania
→1984Thomas Marble Quarry Houses — West Whiteland, Chester County, Pennsylvania
→2004Thomas Mill and Miller's House — West Whiteland, Chester County, Pennsylvania
→1984Thomas Mill and Miller's House — West Whiteland, Chester County, Pennsylvania
→1980Thomas Mill Covered Bridge — Philadelphia, Philadelphia County, Pennsylvania
→1984Thomas, Charles, House — West Whiteland, Chester County, Pennsylvania
→1988Thomas, George C., Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1991Thomas, M. Carey, Library, Bryn Mawr College ★ NHL — Bryn Mawr, Montgomery County, Pennsylvania
→1976Thomas, William, House — Bellefonte, Centre County, Pennsylvania
→1997Thome, James, Farm — Eighty Four, Washington County, Pennsylvania
→1977Thompson Cottage — Westchester, Delaware County, Pennsylvania
→1983Thompson Farm — New London, Chester County, Pennsylvania
→1990Thompson Mill — Gibraltar, Berks County, Pennsylvania
→1978Thompson, Gen. John, House — State College, Centre County, Pennsylvania
→1973Thompson, John, House — Richboro, Bucks County, Pennsylvania
→1985Thompson, S. R., House — New Wilmington, Lawrence County, Pennsylvania
→1995Thompson, Thomas H., House — Brownsville, Fayette County, Pennsylvania
→1982Thornburg Historic District — Thornburg, Allegheny County, Pennsylvania
→2006Thornton Village Historic District — Thornbury, Delaware County, Pennsylvania
→1999Thralls, Ernest, House — Spraggs, Greene County, Pennsylvania
→1989Thunderbird Lodge — Rose Valley, Delaware County, Pennsylvania
→1986Tilden, William J., Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→2016Times Finishing Works — Philadelphia, Philadelphia County, Pennsylvania
→2011Tindley Temple United Methodist Church — Philadelphia, Philadelphia County, Pennsylvania
→2021Tioga Mills — Philadelphia, Philadelphia County, Pennsylvania
→1975Titusville City Hall — Titusville, Crawford County, Pennsylvania
→1985Titusville Historic District — Titusville, Crawford County, Pennsylvania
→1988Todd, John, House — Hummelstown, Dauphin County, Pennsylvania
→1983Tomlinson-Huddleston House — Langhorne, Bucks County, Pennsylvania
→1989Totten House — Lancaster, Lancaster County, Pennsylvania
→1982Touraine, The — Philadelphia, Philadelphia County, Pennsylvania
→1992Towanda Historic District — Towanda, Bradford County, Pennsylvania
→1978Townhouse Row — Chambersburg, Franklin County, Pennsylvania
→1974Townsend House — Pughtown, Chester County, Pennsylvania
→1975Trenton City/Calhoun Street Bridge — Morrisville, Bucks County, Pennsylvania
→1976Trevose Manor — Cornwells Heights, Bucks County, Pennsylvania
→2001Trexler Historic District — Albany Township, Berks County, Pennsylvania
→1992Trimble, George, House — Mechanicsburg, Cumberland County, Pennsylvania
→1985Trimbleville Historic District — Pocopson & West Bradford Twps., Chester County, Pennsylvania
→1976Trinity Hall — Washington, Washington County, Pennsylvania
→1976Trinity Lutheran Church — Reading, Berks County, Pennsylvania
→1972Tripp Family Homestead — Scranton, Lackawanna County, Pennsylvania
→1980Trostletown Bridge — Stoystown, Somerset County, Pennsylvania
→1978Trout Hall — Allentown, Lehigh County, Pennsylvania
→1980Troxell-Steckel House — Egypt, Lehigh County, Pennsylvania
→2002Troy Public High School — Troy, Bradford County, Pennsylvania
→1979Trusal Covered Bridge — Willet, Indiana County, Pennsylvania
→2007Try Street Terminal — Pittsburgh, Allegheny County, Pennsylvania
→1993Tuberculosis Hospital of Pittsburgh — Pittsburgh, Allegheny County, Pennsylvania
→1985Tulpehocken Creek Historic District — Womelsdorf, Berks County, Pennsylvania
→1975Tulpehocken Manor Plantation — Myerstown, Lebanon County, Pennsylvania
→1985Tulpehocken Station Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2005Tunkhannock Historic District — Tunkhannock, Wyoming County, Pennsylvania
→1977Tunkhannock Viaduct — Nicholson, Wyoming County, Pennsylvania
→1978Turn Store and the Tinsmith's Shop — Bushkill, Pike County, Pennsylvania
→1979Turn, John, Farm — Stroudsburg, Monroe County, Pennsylvania
→2007Turtle Creek High School — Turtle Creek, Allegheny County, Pennsylvania
→1972Tuscarora Academy — Mifflintown, Juniata County, Pennsylvania
→1973Twaddell's Mill and House — Chadds Ford, Delaware County, Pennsylvania
→1980Twentieth Century Club of Lansdowne — Lansdowne, Delaware County, Pennsylvania
→1979Twin Bridges-East Paden Covered Bridge No. 120 — Forks, Columbia County, Pennsylvania
→1979Twin Bridges-West Paden Covered Bridge No. 121 — Forks, Columbia County, Pennsylvania
→1975Twin Trees Farm — Richboro, Bucks County, Pennsylvania
→1982Twining Farm — Newtown, Bucks County, Pennsylvania
→1987Tyler, George F., Mansion — Newtown, Bucks County, Pennsylvania
→2003Tyler, John J., Arboretum — Lima, Delaware County, Pennsylvania
→1989Tyrone Armory — Tyrone, Blair County, Pennsylvania
→1993Tyrone Borough Historic District — Tyrone, Blair County, Pennsylvania
→2021U.S. Mint Building at Philadelphia — Philadelphia, Philadelphia County, Pennsylvania
→1972U.S. Naval Home ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1977U.S. Post Office — Oil City, Venango County, Pennsylvania
→1972U.S. Post Office — Williamsport, Lycoming County, Pennsylvania
→1981U.S. Post Office — Lancaster, Lancaster County, Pennsylvania
→2018U.S. Post Office and Court House — Scranton, Lackawanna County, Pennsylvania
→1973U.S.S. NIAGARA — Erie, Erie County, Pennsylvania
→1966U.S.S. OLYMPIA ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1994Uhlerstown Historic District — Uhlerstown, Bucks County, Pennsylvania
→1978Ulery Mill — Marianna, Washington County, Pennsylvania
→2007Uneek Havana Cigar Company — Blooming Glen, Bucks County, Pennsylvania
→1974Union Canal Tunnel ★ NHL — Lebanon, Lebanon County, Pennsylvania
→1978Union Church and Burial Ground — Philipsburg, Centre County, Pennsylvania
→1990Union City Historic District — Union City, Erie County, Pennsylvania
→1989Union Hotel — Shepherdstown, Cumberland County, Pennsylvania
→1979Union League of Philadelphia — Philadelphia, Philadelphia County, Pennsylvania
→1980Union Library Company — Hatboro, Montgomery County, Pennsylvania
→1980Union Methodist Episcopal Church — Philadelphia, Philadelphia County, Pennsylvania
→1980Union School — Fort Washington, Montgomery County, Pennsylvania
→1974Union Trust Building — Pittsburgh, Allegheny County, Pennsylvania
→1989Uniontown Downtown Historic District — Uniontown, Fayette County, Pennsylvania
→2003Uniontown Downtown Historic District (Boundary Increase) — Uniontown, Fayette County, Pennsylvania
→1979Unionville Historic District — Unionville, Centre County, Pennsylvania
→1979Unionville Village Historic District — Unionville, Chester County, Pennsylvania
→1999United Cigar Manufacturing Company — York City, York County, Pennsylvania
→2011United States Custom House — Philadelphia, Philadelphia County, Pennsylvania
→2006United States Post Office--Main Branch — Philadelphia, Philadelphia County, Pennsylvania
→2000United States Post Office--Punxsutawney — Punxsutawney, Jefferson County, Pennsylvania
→2012United States Post Office--Sewickley Branch — Sewickley, Allegheny County, Pennsylvania
→2021United Steelworkers Local #1211 Union Hall — Aliquippa, Beaver County, Pennsylvania
→2013Universalist Meeting House of Sheshequin — Sheshequin, Bradford County, Pennsylvania
→1994University Avenue Bridge — Philadelphia, Philadelphia County, Pennsylvania
→1978University of Pennsylvania Campus Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2019Updike, John, Childhood Home — Shillington, Berks County, Pennsylvania
→1987Upper Aquetong Valley Historic District — Solebury, Bucks County, Pennsylvania
→2001Upper Roxborough Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2004Upper Roxborough Historic District (Boundary Increase) — Philadelphia, Philadelphia County, Pennsylvania
→1972Upsala — Philadelphia, Philadelphia County, Pennsylvania
→1995Uptown Somerset Historic District — Somerset, Somerset County, Pennsylvania
→1997Uptown Somerset Historic District (Boundary Increase) — Somerset, Somerset County, Pennsylvania
→1982Uptown Theater and Office Building — Philadelphia, Philadelphia County, Pennsylvania
→2012Ursuline Young Ladies Academy — Pittsburgh, Allegheny County, Pennsylvania
→1990US Court House and Post Office Building — Philadelphia, Philadelphia County, Pennsylvania
→1995US Post Office and Courthouse--Pittsburgh — Pittsburgh, Allegheny County, Pennsylvania
→1990US Post Office--Charleroi — Charleroi, Washington County, Pennsylvania
→1993US Post Office--Connellsville — Connellsville, Fayette County, Pennsylvania
→1992US Post Office--Hanover — Hanover, York County, Pennsylvania
→1978USS BECUNA (SS-319) ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1973Uwchlan Meetinghouse — Lionville, Chester County, Pennsylvania
→1966Valley Forge National Historical Park ★ NHL — Norristown, Chester County, Pennsylvania
→1995Valley Road Bridge, Stewartstown Railroad — Stewartstown, York County, Pennsylvania
→1974Van Dyne Civic Building — Troy, Bradford County, Pennsylvania
→1986Van Kirk Farm — Elizabeth, Allegheny County, Pennsylvania
→1980Van Sant Covered Bridge — New Hope, Bucks County, Pennsylvania
→1995Vandergrift Historic District — Vandergrift, Westmoreland County, Pennsylvania
→1977Vansant Farmhouse — Rushland, Bucks County, Pennsylvania
→1986Vare, Abigail, School — Philadelphia, Philadelphia County, Pennsylvania
→1988Vare, Edwin H., Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1985Vaughan, Rev. Joshua, House — Coatesville, Chester County, Pennsylvania
→1988Vaux, Roberts, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1974Vicary, Capt. William, House — Freedom, Beaver County, Pennsylvania
→2004Vigilant Fire Company Firemen's Monument — Washington Township, Lehigh County, Pennsylvania
→1996Villa Maria Academy — Erie, Erie County, Pennsylvania
→1980Village of Edgewood Historic District — Edgewood, Bucks County, Pennsylvania
→1985Vincent Forge Mansion — Spring City, Chester County, Pennsylvania
→2000Virginville Historic District — Virginville, Berks County, Pennsylvania
→1972Von Steuben, Gen. Frederick, Headquarters ★ NHL — Valley Forge State Park, Chester County, Pennsylvania
→2017W. A. Young and Sons Foundry and Machine Shop ★ NHL — Rices Landing, Greene County, Pennsylvania
→1995Wable--Augustine Tavern — Addison, Somerset County, Pennsylvania
→1980Waggoner Covered Bridge — Loysville, Perry County, Pennsylvania
→1979Waggoner, Daniel, Log House and Barn — Spring Mills, Centre County, Pennsylvania
→1979Wagner Covered Bridge No. 19 — Newlin, Columbia County, Pennsylvania
→1989Wagner Free Institute of Science ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1986Wagner, Gen. Louis, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→2020Wagner, John and Family Farmstead — Lower Saucon Township, Northampton County, Pennsylvania
→1983Wagner's, Charlie, Cafe — Lancaster, Lancaster County, Pennsylvania
→2001Waldenmark — Wrightstown Township, Bucks County, Pennsylvania
→1976Walker-Ewing Log House — Oakdale, Allegheny County, Pennsylvania
→1987Walker, Joseph, House — Tredyffrin Township, Chester County, Pennsylvania
→1979Wall House — Elkins Park, Montgomery County, Pennsylvania
→1995Wallace--Baily Tavern — Brier Hill, Fayette County, Pennsylvania
→1977Wallace-Cross Mill — Felton, York County, Pennsylvania
→2005Walnut Park Plaza Hotel — Philadelphia, Philadelphia County, Pennsylvania
→1972Walnut Street Bridge — Harrisburg, Dauphin County, Pennsylvania
→2023Walnut Street Bridge — Hellertown, Northampton County, Pennsylvania
→1966Walnut Street Theatre ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1980Walnut-Chancellor Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2007Walt Disney Elementary School — Tullytown, Bucks County, Pennsylvania
→1984Walter, Henry, House — Blainsport, Lancaster County, Pennsylvania
→1995Walter, John, Farmstead — Export, Westmoreland County, Pennsylvania
→1980Walter's Mill Bridge — Somerset, Somerset County, Pennsylvania
→1985Walton, Asa, House — Coatesville, Chester County, Pennsylvania
→1986Walton, Rudolph, School — Philadelphia, Philadelphia County, Pennsylvania
→1978Wanamaker, John, Store ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1979Wanich Covered Bridge No. 69 — Fernville, Columbia County, Pennsylvania
→1987Wanner, Peter, Mansion — Reading, Berks County, Pennsylvania
→2002Warburton House — Philadelphia, Philadelphia County, Pennsylvania
→1995Warden, Samuel, House — Mount Pleasant, Westmoreland County, Pennsylvania
→1982Warner Theater — Erie, Erie County, Pennsylvania
→1979Warner Theater — West Chester, Chester County, Pennsylvania
→2004Warner, Isaiah, Farmstead — Wrightstown Township, Bucks County, Pennsylvania
→1991Warren Armory — Warren, Warren County, Pennsylvania
→1977Warren County Courthouse — Warren, Warren County, Pennsylvania
→1999Warren Historic District — Warren, Warren County, Pennsylvania
→1975Warrenpoint — Knauertown, Chester County, Pennsylvania
→1975Warrington Meetinghouse — Wellsville, York County, Pennsylvania
→1990Warrior Ridge Dam and Hydroelectric Plant — Petersburg, Huntingdon County, Pennsylvania
→1973Warrior Run Presbyterian Church — McEwensville, Northumberland County, Pennsylvania
→1976Warwick Furnace/Farms — Knauertown, Chester County, Pennsylvania
→1974Warwick Mills — Elverson, Chester County, Pennsylvania
→1978Warwick, The — Philadelphia, Philadelphia County, Pennsylvania
→1991Washington Armory — Washington, Washington County, Pennsylvania
→1984Washington Avenue Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1974Washington County Courthouse — Washington, Washington County, Pennsylvania
→1974Washington County Jail — Washington, Washington County, Pennsylvania
→1975Washington Hose and Steam Fire Engine Company, No. 1 — Conshohocken, Montgomery County, Pennsylvania
→1981Washington Square — Philadelphia, Philadelphia County, Pennsylvania
→1984Washington Square West Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2015Washington Trust Company Building — Washington, Washington County, Pennsylvania
→1986Washington Vocational School — Pittsburgh, Allegheny County, Pennsylvania
→1986Washington, George, School — Philadelphia, Philadelphia County, Pennsylvania
→1973Washington's Headquarters ★ NHL — Valley Forge State Park, Montgomery County, Pennsylvania
→1973Water Street District — Lock Haven, Clinton County, Pennsylvania
→1990Waterford Bourough Historic District — Waterford, Erie County, Pennsylvania
→1980Waterford Covered Bridge — Waterford, Erie County, Pennsylvania
→1995Waterloo Mills Historic District — Waterloo Mills, Chester County, Pennsylvania
→1988Waterville Bridge — Swatara Gap, Lebanon County, Pennsylvania
→1983Watson-Curtze Mansion — Erie, Erie County, Pennsylvania
→1982Watson, Sally, House — Philadelphia, Philadelphia County, Pennsylvania
→1988Watsontown River Bridge — Watsontown, Northumberland County, Pennsylvania
→1998Waugh, Alexander P. and James S., House — Greenville, Mercer County, Pennsylvania
→2018Waverly Garage — Philadelphia, Philadelphia County, Pennsylvania
→2004Waverly Historic District — Abington, Lackawanna County, Pennsylvania
→1978Way, Nicholas, House — Pittsburgh, Allegheny County, Pennsylvania
→1987Wayne Hotel — Wayne, Delaware County, Pennsylvania
→2012Wayne Junction Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1986Wayne, Anthony, School — Philadelphia, Philadelphia County, Pennsylvania
→1989Waynesboro Armory — Waynesboro, Franklin County, Pennsylvania
→1973Waynesborough House ★ NHL — Paoli, Chester County, Pennsylvania
→1984Waynesburg Historic District — Waynesburg, Greene County, Pennsylvania
→1983WCAU Studios — Philadelphia, Philadelphia County, Pennsylvania
→1978Weaver, Henry, Farmstead — Terre Hill, Lancaster County, Pennsylvania
→1984Weaver, Valentine, House — Macungie, Lehigh County, Pennsylvania
→1980Weaver's Mill Covered Bridge — Churchtown, Lancaster County, Pennsylvania
→1999Weber--Weaver Farm — West Lampeter, Lancaster County, Pennsylvania
→1988Webster Donora Bridge — Donora, Washington County, Pennsylvania
→1984Wee Grimmet — West Whiteland, Chester County, Pennsylvania
→1980Wehr Covered Bridge — Orefield, Lehigh County, Pennsylvania
→1992Weidenboerner, John E., House — St. Mary's, Elk County, Pennsylvania
→1990Weidner Mill — Earlville, Berks County, Pennsylvania
→1966Weiser, Conrad, House ★ NHL — Womelsdorf, Berks County, Pennsylvania
→1972Weiss Hall — Wilkes-Barre, Luzerne County, Pennsylvania
→2001Welkinweir — East Nantmeal Township, Chester County, Pennsylvania
→1999Welles, Ellen and Charles F., House — Wyalusing Township, Bradford County, Pennsylvania
→2003Welles, Ellen and Charles F., House (Boundary Increase) — Wyalusing, Bradford County, Pennsylvania
→1991Wellsboro Armory — Wellsboro, Tioga County, Pennsylvania
→2005Wellsboro Historic District — Wellsboro, Tioga County, Pennsylvania
→1977Wellsville Historic District — Wellsville, York County, Pennsylvania
→1995Welsh--Emery House — Richeyville, Washington County, Pennsylvania
→1990Welsh, John, House — Wyndmoor, Montgomery County, Pennsylvania
→1983Welty's Mill Bridge — Waynesboro, Franklin County, Pennsylvania
→1985Wentz, John, House — Coatesville, Chester County, Pennsylvania
→1973Wentz, Peter, Homestead — Worcester, Montgomery County, Pennsylvania
→1999Weona Park Carousel — Pen Argyl, Northampton County, Pennsylvania
→1984Werner, William, House — Lititz, Lancaster County, Pennsylvania
→1990Wertz Mill — Wernersville, Berks County, Pennsylvania
→1978Wertz's Covered Bridge — Reading, Berks County, Pennsylvania
→1978Wesley AME Zion Church — Philadelphia, Philadelphia County, Pennsylvania
→1984Wesley Building — Philadelphia, Philadelphia County, Pennsylvania
→1990West 21st Street Historic District — Erie, Erie County, Pennsylvania
→1985West Alexander Historic District — West Alexander Borough, Washington County, Pennsylvania
→1990West Chester Boarding School for Boys — West Chester, Chester County, Pennsylvania
→1985West Chester Downtown Historic District — West Chester, Chester County, Pennsylvania
→2005West Chester Historic District (Boundary Increase) — West Chester, Chester County, Pennsylvania
→1981West Chester State College Quadrangle Historic District — West Chester, Chester County, Pennsylvania
→1991West Diamond Street Townhouse Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1997West End Wheelmen's Club — Wilkes-Barre, Luzerne County, Pennsylvania
→1979West End-North Side Bridge — Pittsburgh, Allegheny County, Pennsylvania
→1988West Hickory Bridge — West Hickory, Forest County, Pennsylvania
→1992West Laurel Hill Cemetery — Bala Cynwyd, Montgomery County, Pennsylvania
→1984West Lawn — Lancaster, Lancaster County, Pennsylvania
→1985West Middletown Historic District — West Middletown Borough, Washington County, Pennsylvania
→1984West Norristown Historic District — West Norristown, Montgomery County, Pennsylvania
→1985West Overton Historic District — East Huntingdon Township, Westmoreland County, Pennsylvania
→1980West Park Place — Erie, Erie County, Pennsylvania
→1986West Philadelphia High School — Philadelphia, Philadelphia County, Pennsylvania
→2021West Philadelphia Passenger Railway Company Carhouse — Philadelphia, Philadelphia County, Pennsylvania
→1998West Philadelphia Streetcar Suburb Historic District — Philadelphia, Philadelphia County, Pennsylvania
→2004West Side Sanitarium — West York Borough, York County, Pennsylvania
→1984West Sixth Street Historic District — Erie, Erie County, Pennsylvania
→1998West Vincent Highlands Historic District — West Vincent Township, Chester County, Pennsylvania
→1984West Whiteland Inn — Exton, Chester County, Pennsylvania
→1966West, Benjamin, Birthplace ★ NHL — Swarthmore, Delaware County, Pennsylvania
→1982Western Division of the PA Canal — Robinson, Westmoreland County, Pennsylvania
→1974Western Division-Pennsylvania Canal — Torrance, Westmoreland County, Pennsylvania
→1987Westinghouse Air Brake Company General Office Building — Wilmerding, Allegheny County, Pennsylvania
→1986Westinghouse High School — Pittsburgh, Allegheny County, Pennsylvania
→1977Westinghouse, George, Memorial Bridge — East Pittsburgh, Allegheny County, Pennsylvania
→1988Westlawn — Wallingford, Delaware County, Pennsylvania
→1995Westmont Historic District — Westmont, Cambria County, Pennsylvania
→1978Westmoreland County Courthouse — Greensburg, Westmoreland County, Pennsylvania
→1973Wetherby-Hampton-Snyder-Wilson-Erdman Log House — Tredyffrin, Chester County, Pennsylvania
→1975Wetmore House — Warren, Warren County, Pennsylvania
→1986WFIL Studio — Philadelphia, Philadelphia County, Pennsylvania
→1991Wharton Furnace — Hopwood, Fayette County, Pennsylvania
→2019Wharton Street Memorial Methodist Episcopal Church and Sunday School — Philadelphia, Philadelphia County, Pennsylvania
→1974Wheelen House — Downingtown, Chester County, Pennsylvania
→1987Whipple Dam State Park Day Use District — Huntingdon, Huntingdon County, Pennsylvania
→1975White Chimneys — Gap, Lancaster County, Pennsylvania
→1979White Covered Bridge — Garards Fort, Greene County, Pennsylvania
→1984White Hall of Bristol College — Croyden, Bucks County, Pennsylvania
→1987White Horse Farm — Phoenixville, Chester County, Pennsylvania
→2001White Horse Historic District — Willistown Township, Chester County, Pennsylvania
→1985White Horse Tavern — Coatesville, Chester County, Pennsylvania
→1975White Horse Tavern — Douglassville, Berks County, Pennsylvania
→1978White Horse Tavern — Malvern, Chester County, Pennsylvania
→1986White House Inn — St. Thomas Township, Franklin County, Pennsylvania
→1980White Rock Forge Covered Bridge — Kirkwood, Lancaster County, Pennsylvania
→1984White, Hannah, Log House — West Whiteland, Chester County, Pennsylvania
→1998White, John, House — Chartiers Township, Washington County, Pennsylvania
→1980Whitefield House and Gray Cottage — Nazareth, Northampton County, Pennsylvania
→2018Whiteford, Hugh and Elizabeth Ross, House — Delta, York County, Pennsylvania
→1983Whitehall Apartments — Haverford, Montgomery County, Pennsylvania
→1999Whitehill-- Gleason Motors — Pittsburgh, Allegheny County, Pennsylvania
→1984Whitford Garne — West Whiteland, Chester County, Pennsylvania
→1984Whitford Hall — West Whiteland, Chester County, Pennsylvania
→1984Whitford Station House — West Whiteland, Chester County, Pennsylvania
→2006Whitpain Public School — Blue Bell, Montgomery County, Pennsylvania
→1995Whitsett Historic District — Whitsett, Fayette County, Pennsylvania
→1988Whittier, John Greenleaf, School — Philadelphia, Philadelphia County, Pennsylvania
→1988Wickersham, Gideon, Farmstead — Kennett Square, Chester County, Pennsylvania
→1972Widow Maloby's Tavern — Philadelphia, Philadelphia County, Pennsylvania
→1974Widow Piper's Tavern — Shippensburg, Cumberland County, Pennsylvania
→1986Wightman School — Pittsburgh, Allegheny County, Pennsylvania
→2013Wilde, John and Brother, Inc. — Philadelphia, Philadelphia County, Pennsylvania
→2012Wiley--Cloud House — Kennett Square, Chester County, Pennsylvania
→1982Wilhelm Mansion and Carriage House — Reading, Berks County, Pennsylvania
→2019Wilkes-Barre Silk Company Mill — Wilkes-Barre, Luzerne County, Pennsylvania
→1985Wilkinson House — Pocopson Twp., Chester County, Pennsylvania
→1986Willard, Francis E., School — Philadelphia, Philadelphia County, Pennsylvania
→1985William Penn Hotel — Pittsburgh, Allegheny County, Pennsylvania
→1988Williams Deluxe Cabins — West Whiteland, Chester County, Pennsylvania
→2004Williams, Ellis, House — East Goshen, Chester County, Pennsylvania
→1978Williams, John, Farm — Phoenixville, Chester County, Pennsylvania
→1977Williams, John, House — Williams Grove, Cumberland County, Pennsylvania
→1997Williams, Roger, Public School No. 10 — Scranton, Lackawanna County, Pennsylvania
→1995Williamsburg Historic District — Williamsburg, Blair County, Pennsylvania
→1991Williamsport Armory — Williamsport, Lycoming County, Pennsylvania
→1976Williamsport City Hall — Williamsport, Lycoming County, Pennsylvania
→1979Willis House — York, York County, Pennsylvania
→2002Willow Mill Complex — Richboro, Bucks County, Pennsylvania
→1984Wills Hospital — Philadelphia, Philadelphia County, Pennsylvania
→2006Willson, Thomas A. and Co. — Reading, Berks County, Pennsylvania
→1974Wilmot House — Bethany, Wayne County, Pennsylvania
→1978Wilmot Mansion — Bethany, Wayne County, Pennsylvania
→1988Wilmot, David, School — Phildelphia, Philadelphia County, Pennsylvania
→2011Wilpen Hall — Sewickley Heights, Allegheny County, Pennsylvania
→1995Wilson College — Chambersburg, Franklin County, Pennsylvania
→2013Wilson, August, House — Pittsburgh, Allegheny County, Pennsylvania
→1982Wilson, George, Homestead — Centennial, Centre County, Pennsylvania
→2012Wilson, James, Public School — Philadelphia, Philadelphia County, Pennsylvania
→1996Wilson, Levi, Tavern — Buffalo Twp., Washington County, Pennsylvania
→1985Wilson, Robert, House — Coatesville, Chester County, Pennsylvania
→1986Wilson, Woodrow, Junior High School — Philadelphia, Philadelphia County, Pennsylvania
→1979Wilson's Mill Covered Bridge — Avella, Washington County, Pennsylvania
→1991Windber Historic District — Windber, Somerset County, Pennsylvania
→1994Windom Mill Farm — Lancaster, Lancaster County, Pennsylvania
→1990Windsor Forge Mansion — Churchtown, Lancaster County, Pennsylvania
→1979Winings, Jacob, House and Clover Mill — Phoenixville, Chester County, Pennsylvania
→1992Wirts House — Gettysburg, Adams County, Pennsylvania
→1979Wisner, Jacob, House — Malvern, Chester County, Pennsylvania
→1983Wissahickon — Philadelphia, Philadelphia County, Pennsylvania
→1979Wissahickon Inn — Philadelphia, Philadelphia County, Pennsylvania
→1988Wissahickon Memorial Bridge — Philadelphia, Philadelphia County, Pennsylvania
→1988Wister, Mary Channing, School — Philadelphia, Philadelphia County, Pennsylvania
→1978Witherspoon Building — Philadelphia, Philadelphia County, Pennsylvania
→1988Witherup Bridge — Kennerdell, Venango County, Pennsylvania
→1978Witmer's Tavern — Lancaster, Lancaster County, Pennsylvania
→1988Wolf, George, School — Philadelphia, Philadelphia County, Pennsylvania
→2002Wolf, Penrose, Building — Rockwood, Somerset County, Pennsylvania
→1980Wolley Stille — Wallingford, Delaware County, Pennsylvania
→1984Wollner Building — Lewistown, Mifflin County, Pennsylvania
→1996Woman's Club of Warren — Warren, Warren County, Pennsylvania
→2008Woman's Medical College of Pennsylvania — Philadelphia, Philadelphia County, Pennsylvania
→1982Womelsdorf Historic District — Womelsdorf, Berks County, Pennsylvania
→2008Woodcrest — Radnor Township, Delaware County, Pennsylvania
→1979Wooden Baggage Express No. 6 — Strasburg, Lancaster County, Pennsylvania
→1979Wooden Express Baggage No. 6076 — Strasburg, Lancaster County, Pennsylvania
→1979Wooden Hopper Gondola No. 1818 — Strasburg, Lancaster County, Pennsylvania
→1967Woodford ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1973Woodland — St. Thomas, Franklin County, Pennsylvania
→1984Woodland Station — West Whiteland, Chester County, Pennsylvania
→1972Woodland Terrace — Philadelphia, Philadelphia County, Pennsylvania
→1967Woodlands, The ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1988Woodledge — West Whiteland, Chester County, Pennsylvania
→1998Woodmont ★ NHL — Gladwyne, Montgomery County, Pennsylvania
→1993Woods, John, House — Pittsburgh, Allegheny County, Pennsylvania
→1979Woods, Nettie, Covered Bridge — Oak Forest, Greene County, Pennsylvania
→1992Woodvale Historic District — Woodvale, Huntingdon County, Pennsylvania
→2005Woodward Hill Cemetery — Lancaster, Lancaster County, Pennsylvania
→1978Woodward Inn — Woodward, Centre County, Pennsylvania
→1986Woolslair Elementary School — Pittsburgh, Allegheny County, Pennsylvania
→1979Work, Col. John, House — Mercersburg, Franklin County, Pennsylvania
→1985Worker's House at Lower Laurel Iron Works — Newlin Twp., Chester County, Pennsylvania
→1987Worlds End State Park Family Cabin District — Forksville, Sullivan County, Pennsylvania
→1976Wormley, John, House — Wormleysburg, Cumberland County, Pennsylvania
→1995Worth--Jefferis Rural Historic District — Marshallton, Chester County, Pennsylvania
→1979Wright, Cerl, Covered Bridge — Bentleyville, Washington County, Pennsylvania
→2007Wright, Enoch, House — Peters Township, Washington County, Pennsylvania
→1986Wright, Richardson L., School — Philadelphia, Philadelphia County, Pennsylvania
→2022Wright’s Block — Erie, Erie County, Pennsylvania
→1979Wright's Ferry Mansion — Columbia, Lancaster County, Pennsylvania
→1975Wrightstown Friends Meeting Complex — Wrightstown, Bucks County, Pennsylvania
→2007Wrightstown Octagonal Schoolhouse — Wrightstown, Bucks County, Pennsylvania
→1983Wrightsville Historic District — Wrightsville, York County, Pennsylvania
→2003Wyalusing Borough Historic District — Wyalusing Borough, Bradford County, Pennsylvania
→1971Wyck House ★ NHL — Philadelphia, Philadelphia County, Pennsylvania
→1985Wycombe Village Historic District — Buckingham and Wrightstown Townships, Bucks County, Pennsylvania
→1997Wyeth, N.C., House and Studio ★ NHL — Chadds Ford Township, Delaware County, Pennsylvania
→1979Wyit Sprowls Covered Bridge — West Finley, Washington County, Pennsylvania
→1986Wyncote Historic District — Philadelphia, Montgomery County, Pennsylvania
→2008Wynnestay — Philadelphia, Philadelphia County, Pennsylvania
→2015Wyoming Central Office of the Bell Telephone Company — Philadelphia, Philadelphia County, Pennsylvania
→2002Wyoming Monument — Wyoming Borough, Luzerne County, Pennsylvania
→1979Wyoming Seminary — Kingston, Luzerne County, Pennsylvania
→1979Y Covered Bridge No. 156 — Central, Columbia County, Pennsylvania
→2005Yardley Historic District — Yardley, Bucks County, Pennsylvania
→1992Yeakle and Miller Houses — Erdenheim, Montgomery County, Pennsylvania
→1988Yeakle's Mill Bridge — Yeakle Mill, Franklin County, Pennsylvania
→1982Yeates, Jasper, House — Lancaster, Lancaster County, Pennsylvania
→1991YMCA of Germantown — Philadelphia, Philadelphia County, Pennsylvania
→1990Yoder Mill — Pikeville, Berks County, Pennsylvania
→1990York Armory — York, York County, Pennsylvania
→2008York Casket Company — York, York County, Pennsylvania
→1978York Central Market — York, York County, Pennsylvania
→1978York Dispatch Newspaper Offices — York, York County, Pennsylvania
→1979York Historic District — York, York County, Pennsylvania
→2008York Historic District (Boundary Increase) — York, York County, Pennsylvania
→1985York Iron Company Mine — Spring Grove, York County, Pennsylvania
→1975York Meetinghouse — York, York County, Pennsylvania
→2012Yorktown Historic District — Philadelphia, Philadelphia County, Pennsylvania
→1997Youghiogheny Bank of Pennslyvania — Perryopolis, Fayette County, Pennsylvania
→1980Young Men's Christian Association — Philadelphia, Philadelphia County, Pennsylvania
→1985Young, Joseph, House — Newlin Twp., Chester County, Pennsylvania
→1985Young, Robert, House — Coatesville, Chester County, Pennsylvania
→1992Young, Smyth, Field Company Building — Philadelphia, Philadelphia County, Pennsylvania
→1985Yuengling, D. G., and Son Brewing Complex — Pottsville, Schuylkill County, Pennsylvania
→1979Yuengling, Frank D., Mansion — Pottsville, Schuylkill County, Pennsylvania
→1992Zeigler, John, Farm House — York Springs, Adams County, Pennsylvania
→1975Zeller, Heinrich, House — Newmanstown, Lebanon County, Pennsylvania
→2001Zeta Psi Fraternity House — Easton, Northampton County, Pennsylvania
→1995Zimmerman, Daniel B., Mansion — Somerset, Somerset County, Pennsylvania
→1979Zimmermann, Marie, Farm — Milford, Pike County, Pennsylvania
→2023Zion Baptist Church and Educational Annex — Philadelphia, Philadelphia County, Pennsylvania
→1972Zion Lutheran Church — East Stroudsburg, Monroe County, Pennsylvania
→1979Zion Lutheran Church and Graveyard — Hummelstown, Dauphin County, Pennsylvania
→1979Zion Reformed Church — Chambersburg, Franklin County, Pennsylvania
→1984Zion Stone Church — Augustaville, Northumberland County, Pennsylvania
→1979Zollinger-Harned Company Building — Allentown, Lehigh County, Pennsylvania
→1976Zook House — Exton, Chester County, Pennsylvania
→2000Zook House — W. Whiteland, Chester County, Pennsylvania
→1984Zook House (Boundary Increase) — Exton, Chester County, Pennsylvania
→1995Zook, Jacob, House — Exton, Chester County, Pennsylvania
→1980Zook's Mill Covered Bridge — Brownstown, Lancaster County, Pennsylvania
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