By state
Historic places in Ohio
3,841 Ohio listings on the National Register of Historic Places, each mapped and dated.
1973
"S" Bridge II — New Concord, Muskingum County, Ohio
→1978103rd Ohio Volunteer Infantry Association Barracks — Sheffield Lake, Lorain County, Ohio
→2021A. Schrader’s Son, Inc. of Ohio Buildings — Akron, Summit County, Ohio
→1975Abbott-Page House — Milan, Erie County, Ohio
→1985Acton House — Eaton, Preble County, Ohio
→1998Ada Pennsylvania Station and Railroad Park — Ada, Hardin County, Ohio
→2012Adams Bag Company Paper Mill and Sack Factory — Chagrin Falls, Cuyahoga County, Ohio
→1999Adams Covered Bridge — Malta, Morgan County, Ohio
→2004Adams School — Findlay, Hancock County, Ohio
→1975Adams Street Double House — Sandusky, Erie County, Ohio
→1979Adams-Gray House — Trinway, Coshocton County, Ohio
→1980Adams, Demas, House — Worthington, Franklin County, Ohio
→1984Adams, G., House — Millersburg, Holmes County, Ohio
→1979Adams, George W., House — Trinway, Muskingum County, Ohio
→1973Adelbert Hall, Case Western Reserve University — Cleveland, Cuyahoga County, Ohio
→1970Adena (Thomas Worthington House) ★ NHL — Chillicothe, Ross County, Ohio
→1980Adena Court Apartments — Zanesville, Muskingum County, Ohio
→1982Adgate Block — Lima, Allen County, Ohio
→1973Administration Building, Lake Erie College — Painesville, Lake County, Ohio
→1982African Jackson Cemetery — Piqua, Miami County, Ohio
→1978Agler-La Follette House — Columbus, Franklin County, Ohio
→1979Aigler Alumni Building — Tiffin, Seneca County, Ohio
→1986Akron Jewish Center — Akron, Summit County, Ohio
→1983Akron Post Office and Federal Building — Akron, Summit County, Ohio
→1983Akron Public Library — Akron, Summit County, Ohio
→1980Akron Rural Cemetery Buildings — Akron, Summit County, Ohio
→2023Akron Soap Company — Akron, Summit County, Ohio
→1980Akron Y.M.C.A. Building — Akron, Summit County, Ohio
→2001Akron--Fulton International Airport Administration Building — Akron, Summit County, Ohio
→1982Alameda Apartments — Zanesville, Muskingum County, Ohio
→2014Alameda Flats, The — Cincinnati, Hamilton County, Ohio
→1979Alcazar Hotel — Cleveland Heights, Cuyahoga County, Ohio
→1978Aldrich, Aaron, House — Bay Village, Cuyahoga County, Ohio
→1987Alexander, Dr. William S., House — Oxford, Butler County, Ohio
→1997Alexandra, The — Cincinati, Hamilton County, Ohio
→1980Alkemeyer Commercial Buildings — Cincinnati, Hamilton County, Ohio
→1978Alkire House — Westerville, Franklin County, Ohio
→1982All Saints Episcopal Church — Portsmouth, Scioto County, Ohio
→1976All Souls Unitarian-Universalist Church — Bellville, Richland County, Ohio
→1974Allen County Courthouse — Lima, Allen County, Ohio
→1982Allen Memorial Medical Library — Cleveland, Cuyahoga County, Ohio
→1979Allen, Darlon, House — Wellington, Lorain County, Ohio
→1971Allen, Dr. Peter, House — Kinsman, Trumbull County, Ohio
→1976Allen, Lyman, House And Barn — Amanda, Fairfield County, Ohio
→1995Alliance Bank Building — Alliance, Stark County, Ohio
→1978Alliance Clay Product Company — Alliance, Mahoning County, Ohio
→1987Alling, Francis D., House — Tallmadge, Summit County, Ohio
→1980Alms and Doepke Dry Goods Company — Cincinnati, Hamilton County, Ohio
→2005Alta Public Library — Cleveland, Cuyahoga County, Ohio
→2014Ambassador, The — Cincinnati, Hamilton County, Ohio
→2002Ambler Heights Historic District — Cleveland Heights, Cuyahoga County, Ohio
→2007American Can Company Building — Cincinnati, Hamilton County, Ohio
→2011American Felsol Company Building — Lorain, Lorain County, Ohio
→2017American Insurance Union Citadel — Columbus, Franklin County, Ohio
→1978Ames, Charles Rice, House — Belpre, Washington County, Ohio
→1975Amherst Town Hall — Amherst, Lorain County, Ohio
→2001Anderson Brothers Department Store — Portsmouth, Scioto County, Ohio
→1982Anderson Ferry — Cincinnati, Hamilton County, Ohio
→1977Anderson Schoolhouse — Ashland, Ashland County, Ohio
→1974Anderson-Shaffer House — Hamilton, Butler County, Ohio
→1976Anderson, Judge William Shaw, House — Austintown, Mahoning County, Ohio
→1976Anderson, Levi, House — Chillicothe, Ross County, Ohio
→1979Anderson, William Marshall, House — Circleville, Pickaway County, Ohio
→1995Andres, Charles, House — Middle Bass Island, Ottawa County, Ohio
→1974Andrews, Ebenezer, House — Milan, Erie County, Ohio
→1978Anna Town Hall — Anna, Shelby County, Ohio
→1977Anna-Dean Farm — Barberton, Summit County, Ohio
→1992Annis, John M., House — North Royalton, Cuyahoga County, Ohio
→2008Ansel Road Apartment Buildings Historic District — Cleveland, Cuyahoga County, Ohio
→1975Antioch Hall, North And South Halls — Yellow Springs, Greene County, Ohio
→2013Antioch Temple — Dayton, Montgomery County, Ohio
→1982Antlers Hotel — Lorain, Lorain County, Ohio
→1980Antwerp Norfolk and Western Depot — Antwerp, Paulding County, Ohio
→1973Apostolic Bethlehem Temple Church — Cincinnati, Hamilton County, Ohio
→1974Arcade Hotel — Springfield, Clark County, Ohio
→1987Archwood Avenue Historic District — Cleveland, Cuyahoga County, Ohio
→1994Archwood Congregational Church — Cleveland, Cuyahoga County, Ohio
→1989Arendt--Seymour House — Canal Winchester, Franklin County, Ohio
→1974Arlington Avenue District — Youngstown, Mahoning County, Ohio
→1982Arlington Hotel — Zanesville, Muskingum County, Ohio
→1982Armory-Latisona Building — Lima, Allen County, Ohio
→1986Armstrong Farm — Upper Sandusky, Wyandot County, Ohio
→1978Armstrong, Joseph, Farm — Fredericksburg, Holmes County, Ohio
→1977Arnold Homestead — Dayton, Montgomery County, Ohio
→1980Arrowston — Piqua, Miami County, Ohio
→1979Artz House — Dublin, Franklin County, Ohio
→1987Artz, John, Farmhouse — Lancaster, Fairfield County, Ohio
→1980Ashland Avenue Baptist Church — Toledo, Lucas County, Ohio
→1979Ashland County Courthouse — Ashland, Ashland County, Ohio
→1975Ashtabula County Courthouse Group — Jefferson, Ashtabula County, Ohio
→1983Ashtabula Harbor Light — Ashtabula, Ashtabula County, Ohio
→1975Ashtabula Harbour Commercial District — Ashtabula, Ashtabula County, Ohio
→2019Ashtabula Post Office and Federal Building — Ashtabula, Ashtabula County, Ohio
→1980Ashville Depot — Ashville, Pickaway County, Ohio
→2009ASM Headquarters and Geodesic Dome — Materials Park, Geauga County, Ohio
→2018Astrup Company Building, The — Cleveland, Cuyahoga County, Ohio
→1983Athens B & O Train Depot — Athens, Athens County, Ohio
→2003Athens County Infirmary — Millfield, Athens County, Ohio
→1982Athens Downtown Historic District — Athens, Athens County, Ohio
→1979Athens Governmental Buildings — Athens, Athens County, Ohio
→1980Athens State Hospital — Athens, Athens County, Ohio
→1978Athens State Hospital Cow Barn — Athens, Athens County, Ohio
→2011Athletic Club of Columbus — Columbus, Franklin County, Ohio
→1973Atwater Congregational Church — Atwater, Portage County, Ohio
→1973Auglaize County Courthouse — Wapakoneta, Auglaize County, Ohio
→1984Augspurger Grist Mill — Woodsdale, Butler County, Ohio
→1984Augspurger Paper Company Rowhouse #1 — Woodsdale, Butler County, Ohio
→1984Augspurger Paper Company Rowhouse #2 — Woodsdale, Butler County, Ohio
→1984Augspurger Schoolhouse — Woodsdale, Butler County, Ohio
→1984Augspurger, Frederick, Farm — Trenton, Butler County, Ohio
→1984Augspurger, John, Farm No. 1 — Trenton, Butler County, Ohio
→1984Augspurger, John, Farm No. 2 — Trenton, Butler County, Ohio
→1984Augspurger, Samuel, Farm — Trenton, Butler County, Ohio
→1984Augspurger, Samuel, House — Woodsdale, Butler County, Ohio
→1999Aullwood House and Garden — Dayton, Montgomery County, Ohio
→2002Ault--Weygandt Farm — Orrville, Wayne County, Ohio
→1974Aurora Center Historic District — Aurora, Portage County, Ohio
→1986Aurora Train Station — Aurora, Portage County, Ohio
→1975Ausenbaugh-McElhenny House — Dayton, Montgomery County, Ohio
→1985Austin Hall — Delaware, Delaware County, Ohio
→1982Austin-Magie Farm and Mill District — Oxford, Butler County, Ohio
→1975Austin, Eliphalet, House — Austinburg, Ashtabula County, Ohio
→1974Austintown Log House — Youngstown, Mahoning County, Ohio
→1979Avery-Hunter House — Granville, Licking County, Ohio
→1984Avery, Carlos, House — Wellington, Lorain County, Ohio
→2010Avon Isle — Avon, Lorain County, Ohio
→1986B & O Freight Terminal — Cincinnati, Hamilton County, Ohio
→1976B & O Railroad Viaduct — Bellaire, Belmont County, Ohio
→2005B'nai Israel Synagogue — Toledo, Lucas County, Ohio
→1986Bagby--Hossler House — Tiffin, Seneca County, Ohio
→1976Bailey-Thompson House — Georgetown, Brown County, Ohio
→1978Bair, Jacob H., House — Canton, Stark County, Ohio
→2023Baker Brothers Wholesale Grocery — Zanesville, Muskingum County, Ohio
→2007Baker Motor Vehicle Company Building — Cleveland, Cuyahoga County, Ohio
→1979Baker, John S., House — Cincinnati, Hamilton County, Ohio
→2006Baker, John, Tavern — Radnor, Delaware County, Ohio
→1985Baker, Maj. John C., House — Mechanicsburg, Champaign County, Ohio
→1979Baker, O. T., House — Wellington, Lorain County, Ohio
→1980Balch House — Cincinnati, Hamilton County, Ohio
→2016Baldwin Piano Company Building — Cincinnati, Hamilton County, Ohio
→2013Baldwin--Wallace College North Campus Historic District — Berea, Cuyahoga County, Ohio
→2010Baldwin-Wallace College South Campus Historic District — Berea, Cuyahoga County, Ohio
→1986Baldwin, Joseph W., House — Wyoming, Hamilton County, Ohio
→1975Ballard Road Covered Bridge — Jamestown, Greene County, Ohio
→1986Baltimore & Ohio Railroad Terminal — Youngstown, Mahoning County, Ohio
→1980Bancroft, A. A., House — Granville, Licking County, Ohio
→1997Bank Block Building — Grandview, Franklin County, Ohio
→1973Bank Of Xenia — Xenia, Greene County, Ohio
→1981Bantam Ridge School — Wintersville, Jefferson County, Ohio
→2016Bappert, Joseph and Cecilia, House — Cincinnati, Hamilton County, Ohio
→1979Baptist Parsonage, Old — Wellington, Lorain County, Ohio
→1979Barber Shop — Vermilion, Erie County, Ohio
→1982Barber-Whitticar House — Canton, Stark County, Ohio
→1973Barber, O. C., Barn No. 1 — Barberton, Summit County, Ohio
→1974Barber, O. C., Colt Barn — Barberton, Summit County, Ohio
→1973Barber, O. C., Creamery — Barberton, Summit County, Ohio
→1974Barber, O. C., Machine Barn — Barberton, Summit County, Ohio
→1973Barber, O. C., Piggery — Barberton, Summit County, Ohio
→1987Barder, Byron R., House — Akron, Summit County, Ohio
→1982Barker School — Sandusky, Erie County, Ohio
→1978Barker, Col. Joseph, House — Marietta, Washington County, Ohio
→1979Barker, Judge Joseph, Jr., House — Newport, Washington County, Ohio
→1979Barker, William, Residence — Ghent, Summit County, Ohio
→1999Barkhurst Mill Covered Bridge — Chesterhill, Morgan County, Ohio
→1985Barnesville Baltimore and Ohio Railroad Depot — Barnesville, Belmont County, Ohio
→1984Barnesville Historic District — Barnesville, Belmont County, Ohio
→1974Barnet-Hoover Log House — Orrville, Wayne County, Ohio
→1978Barnett-Criss House — Cambridge, Guernsey County, Ohio
→1982Barney, Freeland T., House — Sandusky, Erie County, Ohio
→1989Barnhardt--Bolenbaugh House — Canal Winchester, Franklin County, Ohio
→1982Barnhisel, Henry II, House — Girard, Trumbull County, Ohio
→1986Barr Hotel — Lima, Allen County, Ohio
→1980Barr House — Amanda, Fairfield County, Ohio
→1985Barr House — Mechanicsburg, Champaign County, Ohio
→1983Barr, Jacob H., House — Mansfield, Richland County, Ohio
→1986Barrett, George, Concrete House — Spring Valley, Greene County, Ohio
→1972Barretts Mills — Rainsboro, Highland County, Ohio
→1979Barretts Mills (Boundary Increase) — Rainsboro, Highland County, Ohio
→1990Bartlett, Joseph and Rachel, House — Fremont, Sandusky County, Ohio
→1987Batavia House — Middlefield, Geauga County, Ohio
→1979Bates Building — Cincinnati, Hamilton County, Ohio
→1982Bates-Cockrem House — Sandusky, Erie County, Ohio
→1983Bath Township Consolidated School — Fairborn, Greene County, Ohio
→1979Bath Township Hall — Bath Center, Summit County, Ohio
→1979Bath Township School — Ghent, Summit County, Ohio
→1982Bauer Apartments — Cincinnati, Hamilton County, Ohio
→1979Baughman Memorial Park — Frazeysburg, Muskingum County, Ohio
→1978Baumgardner, William, House and Farm Buildings — New Carlisle, Miami County, Ohio
→1982Bavarian Brewery — Sandusky, Erie County, Ohio
→1994Baxter, James, House — Amberley Village, Hamilton County, Ohio
→1979Baxtine House — Vermilion, Erie County, Ohio
→1974Bay View Hospital — Bay Village, Cuyahoga County, Ohio
→1978Bazore Mill — Williamsport, Pickaway County, Ohio
→1976Beall, Gen. Reasin, House — Wooster, Wayne County, Ohio
→1975Bear's Mill — Greenville, Darke County, Ohio
→1982Beasley Building — Athens, Athens County, Ohio
→1980Beatty Glass Company — Tiffin, Seneca County, Ohio
→2023Beatty-Moore House — Columbus, Franklin County, Ohio
→1984Beatty, Louis, House — Kelleys Island, Erie County, Ohio
→1974Becker House — Springdale, Hamilton County, Ohio
→1987Becker Lumber and Manufacturing Company — Marietta, Washington County, Ohio
→2002Becker, Francis, House — Clinton, Summit County, Ohio
→1977Beckett-Manrod House — Hamilton, Butler County, Ohio
→2002Bedford Baptist Church — Bedford, Lake County, Ohio
→2004Bedford Historic District — Bedford, Cuyahoga County, Ohio
→1975Bedford Township Hall — Bedford, Cuyahoga County, Ohio
→1983Beebe, Horace Y., House — Ravenna, Portage County, Ohio
→1979Beech Avenue Houses — Cincinnati, Hamilton County, Ohio
→1979Beecher, Lucas, House — Sandusky, Erie County, Ohio
→1984Beehive School — Cleveland, Cuyahoga County, Ohio
→1980Beer, Judge Thomas, House — Bucyrus, Crawford County, Ohio
→1979Beers, Samuel, House — Fredericktown, Knox County, Ohio
→1989Beery, Dr. L. W., House — Canal Winchester, Franklin County, Ohio
→1966Beginning Point of the U.S. Public Land Survey ★ NHL — East Liverpool, Columbiana County, Ohio
→1977Beir, Anna, House — Greenville, Darke County, Ohio
→2012Bell Covered Bridge — Vincent, Washington County, Ohio
→1979Bell House — Fredericktown, Knox County, Ohio
→1980Bell Mansion — Hillsboro, Highland County, Ohio
→1980Bell, C.S., Foundry and Showroom — Hillsboro, Highland County, Ohio
→1986Bell, Dr. James, House — Cleveland, Cuyahoga County, Ohio
→1999Bell, Hiram, Farmstead — Columbiana, Columbiana County, Ohio
→1980Bell's First Home — Hillsboro, Highland County, Ohio
→1980Bell's Opera House — Hillsboro, Highland County, Ohio
→1976Belle Hall Covered Bridge — Croton, Licking County, Ohio
→1994Belleview Heights — Belaire, Belmont County, Ohio
→1976Bellevue — Kingston, Pickaway County, Ohio
→1973Bellville Bandstand — Bellville, Richland County, Ohio
→2010Bellville Cemetery Chapel — Bellville, Richland County, Ohio
→1976Bellville Village Hall — Bellville, Richland County, Ohio
→1987Belmont Historic District — Belmont, Belmont County, Ohio
→1983Belt Line and New York Central Freight House — Zanesville, Muskingum County, Ohio
→1987Bender's Restaurant--Belmont Buffet — Canton, Stark County, Ohio
→2016Benedict, Dr. David De Forest, House — Norwalk, Huron County, Ohio
→2000Benedict, Reuben, House — Marengo, Morrow County, Ohio
→1984Benedict, Sarah, House — Cleveland, Cuyahoga County, Ohio
→1978Bennett Schoolhouse Road Covered Bridge — Minford, Scioto County, Ohio
→1975Bennett, George, House — Harrison, Hamilton County, Ohio
→1973Benninghofen House — Hamilton, Butler County, Ohio
→1977Bepler, August, House — Cincinnati, Hamilton County, Ohio
→1975Berdan Building — Toledo, Lucas County, Ohio
→1975Berea District 7 School — Berea, Cuyahoga County, Ohio
→1980Berea Union Depot — Berea, Cuyahoga County, Ohio
→1974Bergstresser Covered Bridge — Canal Winchester, Franklin County, Ohio
→2005Bernhard, Ann E. Lewis, House — Adena, Jefferson County, Ohio
→1988Bernhard, Frederick, House — Dover, Tuscarawas County, Ohio
→1983Bernheim House — Cincinnati, Hamilton County, Ohio
→1988Berry Brothers Bolt Works — Columbus, Franklin County, Ohio
→2005Berry, Richard Jr., House — Columbus, Franklin County, Ohio
→1975Berryhill-Morris House — Bellbrook, Greene County, Ohio
→1983Berwick Hotel — Cambridge, Guernsey County, Ohio
→1983Bethel Baptist Church — Pataskala, Licking County, Ohio
→1978Bethel Methodist Church — Bantam, Clermont County, Ohio
→1978Bethel Methodist Episcopal Church — Pleasant City, Guernsey County, Ohio
→1983Betts-Longworth Historic District — Cincinnati, Hamilton County, Ohio
→1991Bieber, George, House and Farm — Delaware, Delaware County, Ohio
→1970Big Bottom Massacre Site — Stockport, Morgan County, Ohio
→1975Big Four Depot — Galion, Crawford County, Ohio
→2013Big Four Depot — Middletown, Butler County, Ohio
→1987Bigelow United Methodist Church — Portsmouth, Scioto County, Ohio
→2006Bigelow, Charles H., House — Findlay, Hancock County, Ohio
→1982Biltmore Hotel — Dayton, Montgomery County, Ohio
→2016Bimm Fireproof Warehouse — Dayton, Montgomery County, Ohio
→1982Bing's Hotel — Sandusky, Erie County, Ohio
→1973Bingham Company Warehouse — Cleveland, Cuyahoga County, Ohio
→1983Birckhead Place Historic District — Toledo, Lucas County, Ohio
→2007Birdtown Historic District — Lakewood, Cuyahoga County, Ohio
→1996Birmingham Historic District — Toledo, Lucas County, Ohio
→1986Bissman Block — Mansfield, Richland County, Ohio
→1983Bissman, B.F., House — Mansfield, Richland County, Ohio
→1983Bissman, Peter, House — Mansfield, Richland County, Ohio
→2002Bixler, George, Farm — Brookville, Montgomery County, Ohio
→1976Black River Viaduct, Baltimore And Ohio Railroad — Lodi, Medina County, Ohio
→1979Black Student Union Center — Tiffin, Seneca County, Ohio
→1979Black-Elliott Block — Zanesville, Muskingum County, Ohio
→2002Black, H., and Company Building — Cleveland, Cuyahoga County, Ohio
→1982Black, Joseph, Farmhouse — Circleville, Pickaway County, Ohio
→1980Black, Philip J., House — Loudonville, Ashland County, Ohio
→1978Blackwood Covered Bridge — Athens, Athens County, Ohio
→2010Blaine Hill "S" Bridge — Blane, Pease Township, Belmont County, Ohio
→1982Blair House — Montgomery, Hamilton County, Ohio
→1980Blair, Herbert S., House — Bucyrus, Crawford County, Ohio
→1982Blake, H. G., House — Medina, Medina County, Ohio
→1998Blakeslee Log Cabin — Ashtabula, Ashtabula County, Ohio
→1974Blakslee, Burritt, House — Medina, Medina County, Ohio
→1979Blocksom-Rolls House — Zanesville, Muskingum County, Ohio
→1987Blossom, Elizabeth B., Subdivision Historic District — Beachwood, Cuyahoga County, Ohio
→2004Blossom, Elzabeth B. and Dudley S., Estate Service Compound — Lyndhurst, Cuyahoga County, Ohio
→1996Blume High School — Wapakoneta, Auglaize County, Ohio
→1982Boalt, John, House — Sandusky, Erie County, Ohio
→1998Body Block — Cleveland, Cuyahoga County, Ohio
→1982Boeckling Building — Sandusky, Erie County, Ohio
→1983Boeckling, G. A., House — Sandusky, Erie County, Ohio
→1983BOECKLING, G.A., (side-paddlewheel steamboat) — Sandusky, Erie County, Ohio
→1979Boesel, Adolph, House — New Bremen, Auglaize County, Ohio
→1978Boesel, Julius, House — New Bremen, Auglaize County, Ohio
→1975Bohemian National Hall — Cleveland, Cuyahoga County, Ohio
→1979Boles, E., Cottage — Dublin, Franklin County, Ohio
→1987Bomante House — Cleveland, Cuyahoga County, Ohio
→2015Bombeck, Erma, House — Centerville, Montgomery County, Ohio
→1979Boneyfiddle Commercial Disrict — Portsmouth, Scioto County, Ohio
→1980Bookwalter, Francis, House — Springfield, Clark County, Ohio
→1987Boom Town Historic District — Bowling Green, Wood County, Ohio
→1979Booth Homestead — Guernsey, Guernsey County, Ohio
→1978Bordner House — Canton, Stark County, Ohio
→2009Born Capital Brewery Bottling Works — Columbus, Franklin County, Ohio
→2018Boss Manufacturing Company, The — FIndlay, Hancock County, Ohio
→1980Bossler, Marcus, House — Dayton, Montgomery County, Ohio
→1992Boston Mills Historic District — Boston Mills, Summit County, Ohio
→1979Botkins Elementary School — Botkins, Shelby County, Ohio
→1999Botzum Farm — Cuyahoga Falls, Summit County, Ohio
→1999Boulter, Cedric G., and Patricia Neils, House — Cincinnati, Hamilton County, Ohio
→1978Bowman Mill Covered Bridge — New Reading, Perry County, Ohio
→1980Bowman's Distillery — Tiffin, Seneca County, Ohio
→1982Boy with the Boot Fountain — Sandusky, Erie County, Ohio
→2023Boyce, Julia F. Country Estate — Willoughby, Lake County, Ohio
→1980Boyd School — Berlin, Holmes County, Ohio
→1995Bradford Junction Interlocking Tower — Bradford, Miami County, Ohio
→1994Bradford Shoe Company Building — Columbus, Franklin County, Ohio
→1982Bradford, Henry, Farm — Rochester, Lorain County, Ohio
→1979Bradford, Robert, House — Centerville, Montgomery County, Ohio
→1979Bradley, Capt. Alva, House — Vermilion, Erie County, Ohio
→1979Bradley's, Capt., Second House — Vermilion, Erie County, Ohio
→1982Bramble, Ayres L., House — Cincinnati, Hamilton County, Ohio
→1979Brand, Asher, Residence — Dublin, Franklin County, Ohio
→1975Brand, R., and Company — Toledo, Lucas County, Ohio
→1994Brandville School — Oregon, Lucas County, Ohio
→1978Breckenridge, Justin, House — Grafton, Lorain County, Ohio
→1973Brecksville Town Hall — Brecksville, Cuyahoga County, Ohio
→1992Brecksville Trailside Museum — Brecksville, Cuyahoga County, Ohio
→1982Bredeick-Lang House — Delphos, Van Wert County, Ohio
→1983Breese, Griffith, Farm — Lima, Allen County, Ohio
→1979Brelsford-Seese House — Dublin, Franklin County, Ohio
→1980Brendel, Charles, House — Zanesville, Muskingum County, Ohio
→1980Bretz Farm — Morrall, Marion County, Ohio
→1974Brewer Log House — Springfield, Clark County, Ohio
→1985Brewster Railroad YMCA/Wandle House — Brewster, Stark County, Ohio
→1979Brick Commercial Block — Fredericktown, Knox County, Ohio
→1995Brick Tavern House — St. Clairsville, Belmont County, Ohio
→1980Brick Vernacular House No. 1 — Madison, Lake County, Ohio
→1980Brick Vernacular House No. 2 — Madison, Lake County, Ohio
→2005Bridenbaugh District No. 3 Schoolhouse — Pandora, Putnam County, Ohio
→1975Bright, John, Covered Bridge — Baltimore, Fairfield County, Ohio
→1974Brightman House — Millersburg, Holmes County, Ohio
→1982Brighton-Drydon Historic District — Zanesville, Muskingum County, Ohio
→1980Brittany Apartment Building — Cincinnati, Hamilton County, Ohio
→1986Broad Street Apartments — Columbus, Franklin County, Ohio
→1986Broad Street Christian Church — Columbus, Franklin County, Ohio
→1980Broad Street United Methodist Church — Columbus, Franklin County, Ohio
→1988Broadway Avenue Historic District — Cleveland, Cuyahoga County, Ohio
→1996Broadway Bridge — Greenville, Darke County, Ohio
→1985Broadway Building — Lorain, Lorain County, Ohio
→1975Broadwell, Cyrus, House — Newtown, Hamilton County, Ohio
→1986Bromwell, Jacob, House — Wyoming, Hamilton County, Ohio
→1984Bronson Place — Toledo, Lucas County, Ohio
→2010Brookdale Farm — Akron, Summit County, Ohio
→1985Brookfield Center Historic District — Brookfield, Trumbull County, Ohio
→1984Brooklyn Bank Building — Cleveland, Cuyahoga County, Ohio
→1999Brooklyn Centre Historic District — Cleveland, Cuyahoga County, Ohio
→1975Brooks, James, House — Dayton, Montgomery County, Ohio
→1983Broom Building — Cambridge, Guernsey County, Ohio
→1980Broom-Braden Stone House — Cambridge, Guernsey County, Ohio
→1983Brown Township Building — Ansonia, Darke County, Ohio
→1993Brown--Bender Farm (Boundary Increase) — Cuyahoga Falls, Summit County, Ohio
→2012Brown--Gorman Farm — Evendale, Hamilton County, Ohio
→1975Brown-Wing House — North Bloomfield, Trumbull County, Ohio
→1975Brown, Charles, Gothic Cottage — North Bloomfield, Trumbull County, Ohio
→1979Brown, Jim, House — Peninsula, Summit County, Ohio
→1979Brown, Jim, Tavern — Boston, Summit County, Ohio
→1976Brown, John Hartness, House — Cleveland Heights, Cuyahoga County, Ohio
→1977Brown, John, Farmhouse — Hudson, Summit County, Ohio
→1977Brown, Samuel N., House — Dayton, Montgomery County, Ohio
→1982Brown, Samuel, P., House — Fulton, Morrow County, Ohio
→1974Brown, Seth, House — Monroeville, Huron County, Ohio
→2006Brownell School and Annex — Cleveland, Cuyahoga County, Ohio
→1980Brownella Cottage and Grace Episcopal Church and Rectory — Galion, Crawford County, Ohio
→1979Brownhelm Historic District — Vermilion, Lorain County, Ohio
→1971Brownwood — North Bloomfield, Trumbull County, Ohio
→1975Brubaker Covered Bridge — Gratis, Preble County, Ohio
→2018Bruce-Macbeth Engine Company — Cleveland, Cuyahoga County, Ohio
→1979Brumback Library — Van Wert, Van Wert County, Ohio
→2008Brumberg Building — Ironton, Lawrence County, Ohio
→1989Bruns--Wynkoop House — Canal Winchester, Franklin County, Ohio
→2017Brunswick--Balke--Collender Building — Cincinnati, Hamilton County, Ohio
→1983Bryan Downtown Historic District — Bryan, Williams County, Ohio
→2014Bryant Building — Cleveland, Cuyahoga County, Ohio
→2016Bryant, George, House — Elyria, Lorain County, Ohio
→1983Bryn Mawr — Granville, Licking County, Ohio
→1983Buchwalter House-Applethorpe Farm — Hallsville, Ross County, Ohio
→1970Buckeye Furnace — Jackson, Jackson County, Ohio
→1975Buckeye Furnace Covered Bridge — Wellston, Jackson County, Ohio
→2004Buckeye State Building and Loan Company Building — Columbus, Franklin County, Ohio
→1974Buckeye Station — Manchester, Adams County, Ohio
→1980Buckingham-Petty House — Duncan Falls, Muskingum County, Ohio
→1974Buckland, Ralph P., House — Fremont, Sandusky County, Ohio
→1978Buckner, Dr. Philip, House And Barn — Georgetown, Brown County, Ohio
→1985Bucyrus Commercial Historic District — Bucyrus, Crawford County, Ohio
→1980Bucyrus Mausoleum — Bucyrus, Crawford County, Ohio
→2017Budd Dairy Company — Columbus, Franklin County, Ohio
→1976Buehl House — Berea, Cuyahoga County, Ohio
→1970Buffington Island — Pomeroy, Meigs County, Ohio
→1980Building at 101 North Franklin Street — Ashley, Delaware County, Ohio
→1980Building at 223 West High Street — Ashley, Delaware County, Ohio
→1983Building at 240 Park Avenue West — Mansfield, Richland County, Ohio
→1984Building at 252-254 Park Avenue West — Mansfield, Richland County, Ohio
→1984Building at 309 Park Avenue West — Mansfield, Richland County, Ohio
→2017Building at 3101 Euclid Avenue — Cleveland, Cuyahoga County, Ohio
→1984Building at 415 Park Avenue West — Mansfield, Richland County, Ohio
→1980Building at 500 East High Street — Ashley, Delaware County, Ohio
→1980Building at 505 East High Street — Ashley, Delaware County, Ohio
→2018Building at 620-622 Vine Street — Cincinnati, Hamilton County, Ohio
→2014Bulen, Granville M., House and Farm Complex — Lockbourne, Pickaway County, Ohio
→2008Bull, Jonah, House — Dayton, Montgomery County, Ohio
→2007Bull, T.J. and Sarah, House — Loudonville, Ashland County, Ohio
→2007Bullerdick, Frederick E. and Catherine, House — Cincinnati, Hamilton County, Ohio
→2001Bunker Hill House — Fairhaven, Preble County, Ohio
→1979Burch, William, House — Fredericktown, Knox County, Ohio
→1999Burchfield Homestead — Salem, Columbiana County, Ohio
→1980Burckhardt, A. E., House — Cincinnati, Hamilton County, Ohio
→1974Burdick, Harold B., House — Cleveland Heights, Cuyahoga County, Ohio
→1982Burdsal, Samuel, House — Cincinnati, Hamilton County, Ohio
→1978Burgett House And Barn — Ripley, Brown County, Ohio
→2001Burlington 37 Cemetery — Burlington, Lawrence County, Ohio
→1989Burnett, William, House — Washington Court House, Fayette County, Ohio
→1985Burnham, Henry, House — Mechanicsburg, Champaign County, Ohio
→1976Burr, George, House — Lodi, Medina County, Ohio
→1979Burrell-King House — Oberlin, Lorain County, Ohio
→1976Burrell, Jabez and Robbins, House and Cheese Factory — Sheffield Township, Lorain County, Ohio
→1980Burroughs, C. H., House — Cincinnati, Hamilton County, Ohio
→2008Burt Building — Youngstown, Mahoning County, Ohio
→1979Burt, William, House — Brecksville, Cuyahoga County, Ohio
→1977Burt's Theater — Toledo, Lucas County, Ohio
→1974Burton Village Historic District — Burton, Geauga County, Ohio
→1982Bush Street Historic District — Toledo, Lucas County, Ohio
→1974Bush, Samuel, House — Lancaster, Fairfield County, Ohio
→1974Bushnell, Martin, House — Mansfield, Richland County, Ohio
→1981Butler County Courthouse — Hamilton, Butler County, Ohio
→1974Butler Institute Of American Art — Youngstown, Mahoning County, Ohio
→1982Butler, Charles, House — Franklin, Warren County, Ohio
→1976Butler, Cyrus, House — Birmingham, Erie County, Ohio
→1997Butler, H. Karl, Memorial — Peninsula, Summit County, Ohio
→1979Butler, J.G., House — Dublin, Franklin County, Ohio
→1973Buttles--Johnson House — Worthington, Franklin County, Ohio
→1980Buttles, Aurora, House — Worthington, Franklin County, Ohio
→1972Buxton Inn — Granville, Licking County, Ohio
→1975Byer Covered Bridge — Byer, Jackson County, Ohio
→2008Byers, John F., House — Ravenna, Portage County, Ohio
→2003C. N. & I. Department Power House — Wilberforce, Greene County, Ohio
→1988Cable Park Historic District — Sandusky, Erie County, Ohio
→1982Cable, Frank, House — Sandusky, Erie County, Ohio
→1982Cable, Laurence House — Sandusky, Erie County, Ohio
→1982Cahill, Beck and R. C., Buildings — Lima, Allen County, Ohio
→1988Cahill, Michael, House — Ashtabula, Ashtabula County, Ohio
→1978Cahoon, Samuel C., House — North Ridgeville, Lorain County, Ohio
→1978Cahoon, Wilbur, House — Avon, Lorain County, Ohio
→1980Caldwell, Samuel, House — Caldwell, Noble County, Ohio
→1978Caledonia Bowstring Bridge — Caledonia, Marion County, Ohio
→1980Calvary Episcopal Church Sunday School — Cincinnati, Hamilton County, Ohio
→2003Cambridge Arms — Columbus, Franklin County, Ohio
→1998Camden City Hall and Opera House — Camden, Preble County, Ohio
→1998Camden Public School — Camden, Preble County, Ohio
→1973Camp Chase Site — Columbus, Franklin County, Ohio
→1997Camp Manatoc Concord Lodge and Adirondacks Historic District — Peninsula, Summit County, Ohio
→1997Camp Manatoc Dining Hall — Peninsula, Summit County, Ohio
→1997Camp Manatoc Foresters Lodge and Kit Carson--Dan Boone Cabins Historic District — Peninsula, Summit County, Ohio
→1997Camp Manatoc Legion Lodge — Peninsula, Summit County, Ohio
→1970Campbell Mound — Columbus, Franklin County, Ohio
→1982Campbell School — Sandusky, Erie County, Ohio
→1976Campbell, Hugh, House — Harrison, Hamilton County, Ohio
→1982Canal Fulton Historic District — Canal Fulton, Stark County, Ohio
→1973Canal Warehouse — Chillicothe, Ross County, Ohio
→1982Canal Winchester Methodist Church — Canal Winchester, Franklin County, Ohio
→2007Canal Winchester School — Canal Winchester, Franklin County, Ohio
→1982Canton Public Library — Canton, Stark County, Ohio
→1982Capital University Historic District — Columbus, Franklin County, Ohio
→2013Capital University Historic District (Boundary Increase) — Bexley, Franklin County, Ohio
→1980Capt. Stone House — Cincinnati, Hamilton County, Ohio
→1982Carew Tower ★ NHL — Cincinnati, Hamilton County, Ohio
→1979Cargo Warehouse — Vermilion, Erie County, Ohio
→1984Carkhuff, Stacy G., House — Akron, Summit County, Ohio
→1979Carlin, Patrick, House — Elyria, Lorain County, Ohio
→1975Carnegie Library — Sandusky, Erie County, Ohio
→2004Carnegie Library (Old Wilberforce University Campus) — Wilberforce, Greene County, Ohio
→1980Carnegie Library and Henry St. Clair Memorial Hall — Greenville, Darke County, Ohio
→1992Carnegie Library of Steubenville — Steubenville, Jefferson County, Ohio
→2021Carnegie Library Otterbein University — Westerville, Franklin County, Ohio
→1980Carnegie Public Library — East Liverpool, Columbiana County, Ohio
→1980Carpenter, Wallace W., House — Granville, Licking County, Ohio
→1974Carroll County Courthouse — Carrollton, Carroll County, Ohio
→1990Carroll Township Hall — Oak Harbor, Ottawa County, Ohio
→2013Carroll, John, University North Quad Historic District — University Heights, Cuyahoga County, Ohio
→1989Carty, J.--R. J. Tussing House — Canal Winchester, Franklin County, Ohio
→1999Cary, Freeman Grant, Pleasant Hill Academy — Cincinnati, Hamilton County, Ohio
→1984Cary, G.W., House — Millersburg, Holmes County, Ohio
→1984Cary, Hiram W., House — Millersburg, Holmes County, Ohio
→1992Cascade Locks Historic District — Akron, Summit County, Ohio
→2019Case-Barlow Farm — Hudson, Summit County, Ohio
→1975Casement House — Painesville, Lake County, Ohio
→1979Cassell, Henry, House — Fredericktown, Knox County, Ohio
→1979Cassella Catholic Church and Rectory — Cassella, Mercer County, Ohio
→1984Casstown Lutheran Stone Church — Casstown, Miami County, Ohio
→1983Casterton House — Pataskala, Licking County, Ohio
→2020Castle Block — Ashtabula, Ashtabula County, Ohio
→1983Catawba Island Wine Company — Port Clinton, Ottawa County, Ohio
→1988Cawood, Richard L., Residence — East Liverpool, Columbiana County, Ohio
→1973Caxton Building — Cleveland, Cuyahoga County, Ohio
→1994Cedar Glen Apartments — Cleveland, Cuyahoga County, Ohio
→1977Cedar Hill Cemetery Buildings — Newark, Licking County, Ohio
→1984Cedar Point Light — Sandusky, Erie County, Ohio
→1984Cedarville Opera House — Cedarville, Greene County, Ohio
→1982Celina Main Street Commercial Historic District — Celina, Mercer County, Ohio
→1983Center Inn — Sunbury, Delaware County, Ohio
→1976Center Street Historic District — Ashland, Ashland County, Ohio
→1993Center Street Historic District (Boundary Increase) — Ashland, Ashland County, Ohio
→1974Centerville Historic District — Centerville, Montgomery County, Ohio
→1986Central Assurance Company — Columbus, Franklin County, Ohio
→1982Central Avenue Historic District — Dayton, Montgomery County, Ohio
→2004Central Branch, National Home for Disabled Volunteer Soldiers ★ NHL — Dayton, Montgomery County, Ohio
→1993Central Building of the Columbus Young Men's Christian Association — Columbus, Franklin County, Ohio
→1980Central College Presbyterian Church — Westerville, Franklin County, Ohio
→1987Central High School — Mingo Junction, Jefferson County, Ohio
→1985Central High School — Columbus, Franklin County, Ohio
→1976Central Hotel, Hackedorn and Zimmerman Building — Galion, Crawford County, Ohio
→1986Central Ohio Lunatic Asylum — Columbus, Franklin County, Ohio
→1987Central Public School — Mingo Junction, Jefferson County, Ohio
→1987Central School — Amherst, Lorain County, Ohio
→1980Central Tower Building — Youngstown, Mahoning County, Ohio
→1983Central United Methodist Church — Mansfield, Richland County, Ohio
→1984Central YMCA — Cleveland, Cuyahoga County, Ohio
→1982Central YMCA — Toledo, Lucas County, Ohio
→1979Century Block — Elyria, Lorain County, Ohio
→1984Cermak Building — Cleveland, Cuyahoga County, Ohio
→2013Chagrin Falls East Side Historic District — Chagrin Falls, Cuyahoga County, Ohio
→1974Chagrin Falls Township Hall — Chagrin Falls, Cuyahoga County, Ohio
→1978Chagrin Falls Triangle Park Commercial District — Chagrin Falls, Cuyahoga County, Ohio
→1995Chagrin Falls Triangle Park Commercial District (Boundary Increase) — Chagrin Falls, Cuyahoga County, Ohio
→1974Chagrin Falls West Side District — Chagrin Falls, Cuyahoga County, Ohio
→1982Chalfant Church — Warsaw, Coshocton County, Ohio
→2011Chalker High School — Southington, Trumbull County, Ohio
→1974Chambers Road Covered Bridge — Olive Green, Delaware County, Ohio
→1978Chandler, Matthew, House — Sharon Center, Medina County, Ohio
→1988Chaney, O. P., Grain Elevator — Canal Winchester, Franklin County, Ohio
→1979Chapman-Hutchinson House — Dublin, Franklin County, Ohio
→1979Chapman, John A., House — Wellington, Lorain County, Ohio
→1974Chardon Courthouse Square District — Chardon, Geauga County, Ohio
→2008Chardon Post Office Building — Chardon, Geauga County, Ohio
→1980Cheese-vat Factory — Madison, Lake County, Ohio
→1993Cherry Valley Coke Ovens — Leetonia, Columbiana County, Ohio
→1980Chesney, Dr. John, House — Bucyrus, Crawford County, Ohio
→1979Chester Town Hall — Chesterville, Morrow County, Ohio
→1982Chester Township District School No. 2 — Chesterland, Geauga County, Ohio
→1979Chesterville Methodist Church — Chesterville, Morrow County, Ohio
→1972Chestnut Ridge Farm — Lancaster, Fairfield County, Ohio
→2009Cheviot Fieldhouse — Cheviot, Hamilton County, Ohio
→1979Chickasaw School and Rectory — Chickasaw, Mercer County, Ohio
→1980Childs, Alpha Charles, House — Madison, Lake County, Ohio
→1980Childs, Robertus W., House — Madison, Lake County, Ohio
→2012Chillicothe Veterans Administration Hospital — Chillicothe, Ross County, Ohio
→1979Chillicothe Water And Power Company Pumping Station — Chillicothe, Ross County, Ohio
→1973Chillicothe's Old Residential District — Chillicothe, Ross County, Ohio
→1975Christ Church At The Quarry — Gambier, Knox County, Ohio
→1975Christ Episcopal Church — Huron, Erie County, Ohio
→1978Christ Episcopal Church — Oberlin, Lorain County, Ohio
→1976Christman Covered Bridge — Eaton, Preble County, Ohio
→1982Christman, Daniel, Homestead — Eaton, Preble County, Ohio
→1978Christman, Nicholas, House — Zanesville, Muskingum County, Ohio
→2011Christy, Howard Chandler, Art Studio — Blue Rock, Muskingum County, Ohio
→1972Chuckery Race — Cuyahoga Falls, Summit County, Ohio
→1975Church Hill Road Covered Bridge — Lisbon, Columbiana County, Ohio
→1985Church Of Our Savior — Mechanicsburg, Champaign County, Ohio
→1994Church, John, Company Building — Cincinnati, Hamilton County, Ohio
→1995Cincinnati and Suburban Telephone Company Building — Cincinnati, Hamilton County, Ohio
→2001Cincinnati and Whitewater Canal Tunnel — Cleves, Hamilton County, Ohio
→1972Cincinnati City Hall — Cincinnati, Hamilton County, Ohio
→1999Cincinnati East Manufacturing and Warehouse District — Cincinnati, Hamilton County, Ohio
→1985Cincinnati Enquirer Building — Cincinnati, Hamilton County, Ohio
→1983Cincinnati Gymnasium and Athletic Club — Cincinnati, Hamilton County, Ohio
→1970Cincinnati Music Hall ★ NHL — Cincinnati, Hamilton County, Ohio
→1980Cincinnati Observatory Building ★ NHL — Cincinnati, Hamilton County, Ohio
→1978Cincinnati Street Gas Lamps — Cincinnati, Hamilton County, Ohio
→1983Cincinnati Tennis Club — Cincinnati, Hamilton County, Ohio
→1972Cincinnati Union Terminal ★ NHL — Cincinnati, Hamilton County, Ohio
→1980Cincinnati Work House and Hospital — Cincinnati, Hamilton County, Ohio
→1987Cincinnati Zoo's Historic Reptile House ★ NHL — Cincinnati, Hamilton County, Ohio
→2015Circleville High School — Circleville, Pickaway County, Ohio
→1978Circleville Historic District — Circleville, Pickaway County, Ohio
→1983Cisler Terrace — Marietta, Washington County, Ohio
→1985City Hall — East Liverpool, Columbiana County, Ohio
→1997City Hall and Opera House — Loudonville, Ashland County, Ohio
→1986City Hall Annex — Youngstown, Mahoning County, Ohio
→1986City Mills Building — Mansfield, Richland County, Ohio
→1982City National Bank Building — Canton, Stark County, Ohio
→2016City Savings Bank & Trust Company — Alliance, Stark County, Ohio
→1976Clague House — Westlake, Cuyahoga County, Ohio
→1974Claridon Congregational Church — Claridon, Geauga County, Ohio
→1979Clark, Ansel, House — Wellington, Lorain County, Ohio
→1985Clark, Dr., House — Mechanicsburg, Champaign County, Ohio
→1975Clark, Jared, House — Broadview Heights, Cuyahoga County, Ohio
→1979Clark, Whitney, House — Wellington, Lorain County, Ohio
→1975Classic Theater — Dayton, Montgomery County, Ohio
→1979Clauder's Pharmacy — Cincinnati, Hamilton County, Ohio
→1979Claysville School — Claysville, Guernsey County, Ohio
→2001Clearview Golf Club — East Canton, Stark County, Ohio
→2001Clemens, James and Sophia, Farmstead — Palestine, Darke County, Ohio
→1983Clement, George S., House — Wauseon, Fulton County, Ohio
→1987Clemons, Alexander, House — Marblehead, Ottawa County, Ohio
→1980Clester, Joseph, House — Chauncey, Athens County, Ohio
→1975Cleveland And Pittsburgh Railroad Bridge — Bedford, Cuyahoga County, Ohio
→1973Cleveland Arcade ★ NHL — Cleveland, Cuyahoga County, Ohio
→2008Cleveland Club — Cleveland, Cuyahoga County, Ohio
→2004Cleveland Dental Manufacturing Company Building — Cleveland, Cuyahoga County, Ohio
→1991Cleveland Discount Building — Cleveland, Cuyahoga County, Ohio
→1991Cleveland East Pierhead Light — Cleveland, Cuyahoga County, Ohio
→1973Cleveland Grays Armory — Cleveland, Cuyahoga County, Ohio
→1976Cleveland Harbor Station, U.S. Coast Guard — Cleveland, Cuyahoga County, Ohio
→1982Cleveland Home For Aged Colored People — Cleveland, Cuyahoga County, Ohio
→2007Cleveland Hotel, The — Conneaut, Ashtabula County, Ohio
→2023Cleveland Jewish Center-Cory United Methodist Church — Cleveland, Cuyahoga County, Ohio
→1975Cleveland Mall — Cleveland, Cuyahoga County, Ohio
→2001Cleveland Masonic Temple — Cleveland, Cuyahoga County, Ohio
→1987Cleveland Municipal Stadium — Cleveland, Cuyahoga County, Ohio
→1984Cleveland Packard Building — Cleveland, Cuyahoga County, Ohio
→2016Cleveland Public Carnegie Library Hough Branch — Cleveland, Cuyahoga County, Ohio
→1975Cleveland Public Square — Cleveland, Cuyahoga County, Ohio
→2023Cleveland State University-University Tower — Cleveland, Cuyahoga County, Ohio
→1973Cleveland Trust Company — Cleveland, Cuyahoga County, Ohio
→1982Cleveland Warehouse District — Cleveland, Cuyahoga County, Ohio
→2007Cleveland Warehouse Historic District (Boundary Increase) — Cleveland, Cuyahoga County, Ohio
→1983Cleveland West Pierhead Light — Cleveland, Cuyahoga County, Ohio
→1985Cleveland Worsted Mills Company — Cleveland, Cuyahoga County, Ohio
→1988Cleveland Worsted Mills Redfern Mill — Ravenna, Portage County, Ohio
→2022Cleveland, Columbus, Cincinnati & Indianapolis Railroad Depot — Delaware, Delaware County, Ohio
→1978Clifton Avenue Historic District — Cincinnati, Hamilton County, Ohio
→2007Clifton Methodist Episcopal Church — Cincinnati, Hamilton County, Ohio
→1974Clifton Park Lakefront District — Lakewood, Cuyahoga County, Ohio
→2006Clinton Apartments — Cleveland, Cuyahoga County, Ohio
→2003Clinton Ohio and Erie Canal Historic District--Clinton Lock 2 and 3--Clinton Upper (Lock 2) and Clinton Lower (Lock 3) — Clinton, Summit County, Ohio
→1980Clossman Hardware Store — Zanesville, Muskingum County, Ohio
→1973Clovernook — Cincinnati, Hamilton County, Ohio
→1980Clutts House — Wellston, Jackson County, Ohio
→1996Coal Run Historic District — Coal Run, Washington County, Ohio
→1987Coca-Cola Bottling Corporation — Cincinnati, Hamilton County, Ohio
→1973Cochran Farm — Millville, Butler County, Ohio
→1978Cockerill House — West Union, Adams County, Ohio
→2006Coe, Truman and Sylvia Bull, House — Columbus, Franklin County, Ohio
→1984Coffeen, Goldsmith, House — Lebanon, Warren County, Ohio
→1979Coffman, Fletcher, House — Dublin, Franklin County, Ohio
→2004Cofta, Albert, Farmstead — Richfield, Summit County, Ohio
→1979Coldwater Catholic Church Complex — Coldwater, Mercer County, Ohio
→2007Cole Avenue Housing Project Historic District — Akron, Summit County, Ohio
→1982Coliseum — Sandusky, Erie County, Ohio
→1979College Hall — Tiffin, Seneca County, Ohio
→1973College Hall, Wilmington College — Wilmington, Clinton County, Ohio
→1978College Hill Town Hall — Cincinnati, Hamilton County, Ohio
→1980College of Wooster — Wooster, Wayne County, Ohio
→1987Colonial and Euclid Arcades — Cleveland, Cuyahoga County, Ohio
→1983Colonial, The — Mansfield, Richland County, Ohio
→2005Colony Burying Ground, Old — Granville, Licking County, Ohio
→2001Colony Theatre — Marietta, Washington County, Ohio
→1979Columbia Baptist Cemetery — Cincinnati, Hamilton County, Ohio
→1976Columbia Baptist Church — Columbia Center, Lorain County, Ohio
→1983Columbia Building — Columbus, Franklin County, Ohio
→1976Columbia Town Hall — Columbia Center, Lorain County, Ohio
→1969Columbian House — Waterville, Lucas County, Ohio
→1979Columbiana County Infirmary — Lisbon, Columbiana County, Ohio
→1983Columbus Avenue Historic District — Sandusky, Erie County, Ohio
→1992Columbus Gallery of Fine Arts — Columbus, Franklin County, Ohio
→1997Columbus Grove Municipal Pool — Columbus Grove, Putnam County, Ohio
→1978Columbus Near East Side District — Columbus, Franklin County, Ohio
→1983Columbus Near East Side Historic District-Parsons Avenue (Boundary Increase) — Columbus, Franklin County, Ohio
→1977Columbus Savings and Trust Building — Columbus, Franklin County, Ohio
→1988Columbus Street Historic District — Canal Winchester, Franklin County, Ohio
→1983Columbus Transfer Company Warehouse — Columbus, Franklin County, Ohio
→1988Columbus, Hocking Valley and Toledo Railway Depot — Canal Winchester, Franklin County, Ohio
→1982Commercial Banking & Trust Co. — Sandusky, Erie County, Ohio
→1982Commercial Building — Dayton, Montgomery County, Ohio
→1979Commercial Building — Elyria, Lorain County, Ohio
→1987Commercial Street Historic District — Mingo Junction, Jefferson County, Ohio
→1983Commodore Apartment Building — Shaker Heights, Cuyahoga County, Ohio
→2016Commodore Hotel, The — Cleveland, Cuyahoga County, Ohio
→1997Commodore Perry Hotel — Toledo, Lucas County, Ohio
→1972Concord Hall — Lancaster, Fairfield County, Ohio
→2009Concord Hicksite Friends Meeting House — Colerain Township, Belmont County, Ohio
→1978Congregational Church Of Austinburg — Austinburg, Ashtabula County, Ohio
→1974Congregational Church of Christ — Oberlin, Lorain County, Ohio
→1971Congregational-Presbyterian Church — Kinsman, Trumbull County, Ohio
→1992Conneaut Harbor West Breakwater Light — Conneaut, Ashtabula County, Ohio
→1992Conneaut Light Station Keeper's Dwelling — Conneaut, Ashtabula County, Ohio
→1973Connecticut Land Company Office — Unionville, Lake County, Ohio
→1987Conner, Alexander, House — Xenia, Greene County, Ohio
→1975Conover Building — Dayton, Montgomery County, Ohio
→1982Converse-Mertz Apartments — Sandusky, Erie County, Ohio
→2021Convoy Opera House-City Hall-Firehouse Building — Convoy, Van Wert County, Ohio
→1984Cook Building — Cleveland, Cuyahoga County, Ohio
→1995Cook, George E., House — Canton, Stark County, Ohio
→1983Cook, J.M., House — Mansfield, Richland County, Ohio
→1977Cook, John, Farm — Harlem, Delaware County, Ohio
→1976Cook, Zimri, House — Lester, Medina County, Ohio
→1982Cooke-Robertson House — Sandusky, Erie County, Ohio
→1982Cooke, Eleutheros, House — Sandusky, Erie County, Ohio
→1982Cooke, Eleutheros, House — Sandusky, Erie County, Ohio
→1966Cooke, Jay, House ★ NHL — Gibraltar Island, Ottawa County, Ohio
→1979Cooley Farms — Warrensville Heights, Cuyahoga County, Ohio
→1979Coonrad, Jonas, House — Brecksville, Cuyahoga County, Ohio
→1996Cooper, Katherine, House — Dover, Tuscarawas County, Ohio
→1993Cooper, Samuel, Farmhouse — Radnor, Delaware County, Ohio
→2001Copley Depot — Copley, Summit County, Ohio
→2017Copley Township Cemetery Receiving Vault — Copley, Summit County, Ohio
→1978Coppess, Benjamin Franklin House — Greenville, Darke County, Ohio
→1989Corbusier, John William Creswell, House — Hudson, Summit County, Ohio
→2003Corlett Building — Cleveland, Cuyahoga County, Ohio
→1972Corning-White House — Mentor, Lake County, Ohio
→2001Corwin Council House and Jail — Corwin, Warren County, Ohio
→1984Corwin House — Lebanon, Warren County, Ohio
→1984Corwin-Bolin House — Lebanon, Warren County, Ohio
→1979Cory, Ambrose, House — Fostoria, Seneca County, Ohio
→1973Coshocton County Courthouse — Coshocton, Coshocton County, Ohio
→1984Cote Bonneville — Cincinnati, Hamilton County, Ohio
→1993Cottage Hill Farm — Ravenna, Portage County, Ohio
→1979Coulby, Harry, Mansion — Wickliffe, Lake County, Ohio
→1974Court Street Firehouse — Cincinnati, Hamilton County, Ohio
→1979Courthouse Center — Newark, Licking County, Ohio
→1984Courtland Flats — Cincinnati, Hamilton County, Ohio
→2000Courtland, The — Cleveland, Cuyahoga County, Ohio
→1973Covenant First Presbyterian Church — Cincinnati, Hamilton County, Ohio
→1981Covington Historic Government Building — Covington, Miami County, Ohio
→1974Cowan Creek Circular Enclosure — Wilmington, Clinton County, Ohio
→1973Cox, George B., House — Cincinnati, Hamilton County, Ohio
→1975Cox, Jacob D., House — Cincinnati, Hamilton County, Ohio
→1974Cozad, Justus L., House — Cleveland, Cuyahoga County, Ohio
→1975Crabill, David, House — Springfield, Clark County, Ohio
→1982Crafts William H., House — Mantua, Portage County, Ohio
→1990Crandall Park--Fifth Avenue Historic District — Youngstown, Mahoning County, Ohio
→1978Crane, Jonathan, Farm — Franklin, Warren County, Ohio
→1993Cranz, Edward, Farm — Peninsula, Summit County, Ohio
→1993Cranz, William and Eugene, Farm — Peninsula, Summit County, Ohio
→1979Crawfis Institute — Sugar Grove, Fairfield County, Ohio
→1978Crawford-Tilden Apartments — Cleveland, Cuyahoga County, Ohio
→1979Crawford, Col. William, Capture Site — Leesville, Crawford County, Ohio
→1982Crawford, Col., Burn Site Monument — Crawford, Wyandot County, Ohio
→1986Crescent Hill — Dresden, Muskingum County, Ohio
→2014Crescent, The — Cincinnati, Hamilton County, Ohio
→1974Crestline City Hall — Crestline, Crawford County, Ohio
→1994Crist Tavern Annex--Millworkers Boarding House — Delaware, Delaware County, Ohio
→1982Crittenden Farm — Savannah, Ashland County, Ohio
→1985Croco House — Holmesville, Holmes County, Ohio
→1978Cronenwett, Georg, House — Woodville, Sandusky County, Ohio
→2015Crosley Building — Cincinnati, Hamilton County, Ohio
→1976Crossed Keys Tavern — Lebanon, Warren County, Ohio
→1990Crumrine, John, Farm — Nova, Ashland County, Ohio
→1990Crumrine, Michael, Farm — Nova, Ashland County, Ohio
→1986Crystal Lake Stock Farm — Ravena, Portage County, Ohio
→1975Culbertson, Robert, House — Troy, Miami County, Ohio
→1985Culbertson, William, House — Mechanicsburg, Champaign County, Ohio
→1979Cummings, Wilson S., House — Fredericktown, Knox County, Ohio
→1986Cummins School — Cincinnati, Hamilton County, Ohio
→1974Cummins, David, Octagon House — Conneaut, Ashtabula County, Ohio
→1987Cunningham--Maier House — Portsmouth, Scioto County, Ohio
→1980Curtis, Walter, House — Little Hocking, Washington County, Ohio
→1982Curtis, William D., House — Sandusky, Erie County, Ohio
→1976Curtiss, Marcus, Inn — Galena, Delaware County, Ohio
→1972Cuvier Press Club — Cincinnati, Hamilton County, Ohio
→1984Dall, Andrew, Jr. and James, Houses — Cleveland, Cuyahoga County, Ohio
→1989Damascus Grade School — Damascus, Mahoning County, Ohio
→1980Damon, George, House — Madison, Lake County, Ohio
→1980Dana, Marcus, House — Fostoria, Hancock County, Ohio
→1979Danalds, Samuel, House — Brookpark, Cuyahoga County, Ohio
→1980Danford, Samuel, Farm, Church and Cemetery — Summerfield, Noble County, Ohio
→1976Darke County Courthouse, Sheriff's House, And Jail — Greenville, Darke County, Ohio
→1971Darrow, Clarence, Octagon House — Kinsman, Trumbull County, Ohio
→1979Datz, Walter, House — Dublin, Franklin County, Ohio
→1975Davey, John, House — Kent, Portage County, Ohio
→1989David's Reformed Church — Canal Winchester, Franklin County, Ohio
→1979Davidson, Tyler, Fountain — Cincinnati, Hamilton County, Ohio
→1979Davis and Dague Grocery Store, Old — Fredericktown, Knox County, Ohio
→1980Davis Mill — Patriot, Gallia County, Ohio
→1979Davis, Alexander, Cabin — Dublin, Franklin County, Ohio
→1979Davis, Alexander, House — Dublin, Franklin County, Ohio
→1975Davis, Anson, House — Dublin, Franklin County, Ohio
→1979Davis, Anson, Springhouse — Dublin, Franklin County, Ohio
→1979Davis, James, Barn — Dublin, Franklin County, Ohio
→1979Davis, James, Farm — Dublin, Franklin County, Ohio
→1979Davis, Samuel Henry, House — Dublin, Franklin County, Ohio
→1974Davis, Samuel, House — Columbus, Franklin County, Ohio
→1979Day, Erastus, House — Lakewood, Cuyahoga County, Ohio
→1975Dayton Arcade — Dayton, Montgomery County, Ohio
→1974Dayton Art Institute — Dayton, Montgomery County, Ohio
→1988Dayton Aviation Heritage National Historical Park — Dayton, Montgomery County, Ohio
→2008Dayton Canoe Club — Dayton, Montgomery County, Ohio
→1978Dayton Daily News Building — Dayton, Montgomery County, Ohio
→1980Dayton Fire Department Station No. 16 — Dayton, Montgomery County, Ohio
→1980Dayton Fire Station No. 14 — Dayton, Montgomery County, Ohio
→1984Dayton Motor Car Company Historic District — Dayton, Montgomery County, Ohio
→2006Dayton Power and Light Building Group — Dayton, Montgomery County, Ohio
→1980Dayton Stove and Cornice Works — Dayton, Montgomery County, Ohio
→1973Dayton Street Historic District — Cincinnati, Hamilton County, Ohio
→1984Dayton Terra-Cotta Historic District — Dayton, Montgomery County, Ohio
→1984Dayton View Historic District — Dayton, Montgomery County, Ohio
→1975Dayton Women's Club — Dayton, Montgomery County, Ohio
→1988Dayton Young Men's Christian Association Building — Dayton, Montgomery County, Ohio
→1983Dayton-Campbell Historic District — Hamilton, Butler County, Ohio
→1980Dayton, James, House — Madison, Lake County, Ohio
→1980Dayton, James, House, II — Madison, Lake County, Ohio
→1975Dean Family Farm — Jamestown, Greene County, Ohio
→1994Dean Family Farm Historic District (Boundary Increase) — Xenia, Greene County, Ohio
→1978Dean Road Bridge — South Amherst, Lorain County, Ohio
→1984Deardoff, Daniel L., House — Franklin, Warren County, Ohio
→1989Decker, Elias, Farmhouse — Canal Winchester, Franklin County, Ohio
→2000Decker, Henry, Farmstead — Springboro, Warren County, Ohio
→1979Decker, Stephen, Rowhouse — Cincinnati, Hamilton County, Ohio
→2005Deeds Carillon — Dayton, Montgomery County, Ohio
→1979Deeds' Barn — Kettering, Montgomery County, Ohio
→1986Deerlick Farm — West Salem, Wayne County, Ohio
→2004Deersville Historic Distirct — Deersville, Harrison County, Ohio
→1975Deerwood Farm — Dayton, Montgomery County, Ohio
→1985Defiance Public Library — Defiance, Defiance County, Ohio
→1980DeHeck, Albert, House — Madison, Lake County, Ohio
→1988Deis, John, House — Dover, Tuscarawas County, Ohio
→1989Deitz, Samuel, Farmhouse — Canal Winchester, Franklin County, Ohio
→2016Del Monte Apartments — Columbus, Franklin County, Ohio
→1979Delashment, Elias, House — Fredericktown, Knox County, Ohio
→1973Delaware County Courthouse — Delaware, Delaware County, Ohio
→1990Delaware County Jail and Sheriff's Residence — Delaware, Delaware County, Ohio
→2020Delaware Post Office — Delaware, Delaware County, Ohio
→1983Delaware Public Library — Delaware, Delaware County, Ohio
→2016Delco Building — Dayton, Montgomery County, Ohio
→1985Demand-Gest House — Mechanicsburg, Champaign County, Ohio
→1980Deming, Col. Simeon, House — Watertown, Washington County, Ohio
→1982Denison, William, House — Adamsville, Muskingum County, Ohio
→2006Dennison High School — Dennison, Tuscarawas County, Ohio
→1990Dentzel, William H., 1921 Carousel — Sandusky, Erie County, Ohio
→1990Dentzel, William H., 1924 Carousel — Sandusky, Erie County, Ohio
→1979Denzel, John, House — Vermilion, Erie County, Ohio
→1980Derby, H. W., Building — Cincinnati, Hamilton County, Ohio
→1980Detmer, A. M., House — Cincinnati, Hamilton County, Ohio
→2010Detrick Milling and Distilling Company — Tipp City, Miami County, Ohio
→1973Detroit Avenue Bridge — Rocky River--Lakewood, Cuyahoga County, Ohio
→1986Detroit--Warren Building — Lakewood, Cuyahoga County, Ohio
→1974Detroit-Superior High Level Bridge — Cleveland, Cuyahoga County, Ohio
→1993Detwiller, John, Tavern and Farmstead — Radnor, Delaware County, Ohio
→1984Deuscher, Henry P., House — Trenton, Butler County, Ohio
→1978Dew House — Nelsonville, Athens County, Ohio
→1982Dewalt Building — Canton, Stark County, Ohio
→1973Dewitt, Zachariah Price, Cabin — Oxford, Butler County, Ohio
→1999Dey Road Bridge — Defiance, Defiance County, Ohio
→1982DeYarmon, Joseph L. House — Lakeville, Holmes County, Ohio
→1985Diamond Historic District — East Liverpool, Columbiana County, Ohio
→1996Diamond Match Historic District — Barberton, Summit County, Ohio
→1985Dilger Store — West Rushville, Fairfield County, Ohio
→1984Disciple-Christian Church — Millersburg, Holmes County, Ohio
→1982Diver, John, House and Storebuilding — Deerfield, Portage County, Ohio
→1974Division Avenue Pumping Station — Cleveland, Cuyahoga County, Ohio
→1984Dixon Hall Apartments — Cleveland, Cuyahoga County, Ohio
→2000Dixon--Globe Opera House--Robinson-Schwenn Building — Hamilton, Butler County, Ohio
→1979Doan House — Wilmington, Clinton County, Ohio
→1984Doan School — Cleveland, Cuyahoga County, Ohio
→2009Dobkins, John and Syd, House — Canton, Stark County, Ohio
→1986Doctors' Building — Cincinnati, Hamilton County, Ohio
→1987Doerzbach, George J., House — Sandusky, Erie County, Ohio
→1987Dole-Darrell House — Portsmouth, Scioto County, Ohio
→1979Domestic Arts Hall And Flower Hall — Burton, Geauga County, Ohio
→1980Domhoff Buildings — Cincinnati, Hamilton County, Ohio
→1989DONALD B (towboat) ★ NHL — Georgetown, Brown County, Ohio
→1982Dorsey Building — Lima, Allen County, Ohio
→1983Douglas, S.M., House — Mansfield, Richland County, Ohio
→1993Dovel--Bowers House — Pickerington, Fairfield County, Ohio
→1982Dovel, J. H., Farm — Pickerington, Fairfield County, Ohio
→1983Dow House — Mansfield, Richland County, Ohio
→1993Downing, John, Jr., House — Middleport, Meigs County, Ohio
→2013Downtown Ashland Historic District — Ashland, Ashland County, Ohio
→2009Downtown Ironton Historic District — Ironton, Lawrence County, Ohio
→2012Downtown Mount Vernon Historic District — Mount Vernon, Knox County, Ohio
→2003Downtown Oberlin Historic District — Oberlin, Lorain County, Ohio
→1978Downtown Tiffin Historic District — Tiffin, Seneca County, Ohio
→1995Downtown Willoughy Historic District — Willoughby, Lake County, Ohio
→1978Drake, Alonzo, House — Oakwood, Cuyahoga County, Ohio
→1978Drake, Elam, House — Columbus, Franklin County, Ohio
→1978Dresden Suspension Bridge — Dresden, Muskingum County, Ohio
→2015Drexel Theater — Bexley, Franklin County, Ohio
→2023Droppers, Carl, House — Berea, Cuyahoga County, Ohio
→1987Duane Block — Lorain, Lorain County, Ohio
→1979Dublin Cemetery Vaults — Dublin, Franklin County, Ohio
→1979Dublin Christian Church — Dublin, Franklin County, Ohio
→1979Dublin Christian Church — Dublin, Franklin County, Ohio
→1979Dublin High Street Historic District — Dublin, Franklin County, Ohio
→1979Dublin Veterinary Clinic — Dublin, Franklin County, Ohio
→1993Duffy, Michael, Farm — Peninsula, Summit County, Ohio
→1979Dun, John, Homestead — Dublin, Franklin County, Ohio
→1980Dunbar Historic District — Dayton, Montgomery County, Ohio
→1966Dunbar, Paul Laurence, House ★ NHL — Dayton, Montgomery County, Ohio
→1984Duncan, Robert P., House — Bexley, Franklin County, Ohio
→1983Duncarrick — Dayton, Montgomery County, Ohio
→1974Dunham Tavern — Cleveland, Cuyahoga County, Ohio
→1975Dunham, Hezekiah, House — Bedford, Cuyahoga County, Ohio
→1976Dunlap, William K., House — Troy, Miami County, Ohio
→1982Dunton House — Norwalk, Huron County, Ohio
→1980Dustin Cabin — Granville, Licking County, Ohio
→2017Duttenhofer Building — Cincinnati, Hamilton County, Ohio
→1983Dye, John Minor, Stone House — Troy, Miami County, Ohio
→1974Eager Inn — Morgantown, Pike County, Ohio
→1995Eagle Cliff Hotel — Geneva-on-the-Lake, Ashtabula County, Ohio
→1975Eagle Creek Covered Bridge — Decatur, Brown County, Ohio
→1983Eagle Point Colony Historic District — Rossford, Wood County, Ohio
→1982Eagles Building — Dayton, Montgomery County, Ohio
→1986Eagles Building — Lorain, Lorain County, Ohio
→1997Eagles Building--Strand Theater — Alliance, Stark County, Ohio
→1982Eagles Temple — Akron, Summit County, Ohio
→1982Eagles' Temple — Canton, Stark County, Ohio
→1976Eakin Mill Covered Bridge — Arbaugh, Vinton County, Ohio
→2008Ealy, George and Christina, House — New Albany, Franklin County, Ohio
→1987Earley-Hartzell House — Alliance, Stark County, Ohio
→1979Early Greek Revival Cottage — Fredericktown, Knox County, Ohio
→1979Early Greek Revival House — Fredericktown, Knox County, Ohio
→1988East 89th Street Historic District — Cleveland, Cuyahoga County, Ohio
→2017East Boulevard Apartment House — Cleveland, Cuyahoga County, Ohio
→2020East Boulevard Historic District — Cleveland, Cuyahoga County, Ohio
→1986East Broad Street Commercial Building — Columbus, Franklin County, Ohio
→1987East Broad Street Historic District — Columbus, Franklin County, Ohio
→1987East Broad Street Presbyterian Church — Columbus, Franklin County, Ohio
→1979East Cleveland District 9 School — Cleveland Heights, Cuyahoga County, Ohio
→1984East End Historic District — Lebanon, Warren County, Ohio
→1985East Fifth Street Historic District — East Liverpool, Columbiana County, Ohio
→1988East Fourth Street Historic District — Cincinnati, Hamilton County, Ohio
→1987East Fourth Street Historic District — Cleveland, Cuyahoga County, Ohio
→1976East Gambier Street District — Mount Vernon, Knox County, Ohio
→1974East High Street District — Springfield, Clark County, Ohio
→1987East High Street Historic District — Mount Vernon, Knox County, Ohio
→2017East Liberty School, District No. 11 — Green, Summit County, Ohio
→2001East Liverpool Downtown Historic District — East Liverpool, Columbiana County, Ohio
→1976East Liverpool Post Office — East Liverpool, Columbiana County, Ohio
→1971East Liverpool Pottery — East Liverpool, Columbiana County, Ohio
→1982East Main Street Historic District — Hillsboro, Highland County, Ohio
→1985East Main Street Historic District — Ravenna, Portage County, Ohio
→1989East Market Street Church of Christ — Akron, Summit County, Ohio
→2010East North Broadway Historic District — Columbus, Franklin County, Ohio
→2013East Ohio Building, The — Cleveland, Cuyahoga County, Ohio
→2003East Ohio Gas Company Building — Cleveland, Cuyahoga County, Ohio
→1990East Point Manor — Middle Bass Island, Ottawa County, Ohio
→1976East River Road Historic District I — Rossford, Wood County, Ohio
→1976East River Road Historic District II — Perrysburg and, Wood County, Ohio
→1973East Second Street District — Xenia, Greene County, Ohio
→1979East Second Street District — Dayton, Montgomery County, Ohio
→1979East Second Street District(Boundary Increase) — Xenia, Greene County, Ohio
→1976East Side Commercial Block — Toledo, Lucas County, Ohio
→1976East Side Fire Station — Defiance, Defiance County, Ohio
→2010East State Street--Elmwood Place Historic District — Athens, Athens County, Ohio
→2001East Third Street Historic District — Dayton, Montgomery County, Ohio
→1996East Toledo Historic District — Toledo, Lucas County, Ohio
→1976East Town Street Historic District — Columbus, Franklin County, Ohio
→1983East Walnut Hills Firehouse — Cincinnati, Hamilton County, Ohio
→2016Eastern Hills Young Men's Christian Association (YMCA) — Cincinnati, Hamilton County, Ohio
→2005Eastwood Historic District — Cincinnati, Hamilton County, Ohio
→2014Eaton High School — Eaton, Preble County, Ohio
→1978Eckenrode And Breisach Houses — Maumee, Lucas County, Ohio
→1983Eckert Building — Cincinnati, Hamilton County, Ohio
→1980Eckis, Nicholas, House — East Fairfield, Columbiana County, Ohio
→1980Eden Park Stand Pipe — Cincinnati, Hamilton County, Ohio
→1980Eden Park Station No. 7 — Cincinnati, Hamilton County, Ohio
→1980Edgecliff — Cincinnati, Hamilton County, Ohio
→1977Edgecliff Area Historic Group — Cincinnati, Hamilton County, Ohio
→1975Edgeton — Hamilton, Butler County, Ohio
→1966Edison, Thomas Alva, Birthplace ★ NHL — Milan, Erie County, Ohio
→2017Edna, The — Columbus, Franklin County, Ohio
→2016Edward Wren Company Building — Springfield, Clark County, Ohio
→1985Edwards Gymnasium/Pfieffer Natatorium — Delaware, Delaware County, Ohio
→1978Edwards, John Stark, House — Warren, Trumbull County, Ohio
→1978Edwards, John, House — Leipsic, Putnam County, Ohio
→1989Edwards, William, Farmhouse — Newtown, Hamilton County, Ohio
→1979Egypt Catholic Church and Rectory — Egypt, Auglaize County, Ohio
→1984Ehresman, Christian, Farm — Trenton, Butler County, Ohio
→1975Eighteen Mile House — Harrison, Hamilton County, Ohio
→1980Eighteenth District School — Cincinnati, Hamilton County, Ohio
→1975Eldean Covered Bridge — Troy, Miami County, Ohio
→1987Elden House — Portsmouth, Scioto County, Ohio
→1998Eldridge--Higgins Building — Coshocton, Coshocton County, Ohio
→1997Elizabeth Township Rural Historic District — Casstown, Miami County, Ohio
→1985Elks Club — East Liverpool, Columbiana County, Ohio
→1982Elks Lodge — Lima, Allen County, Ohio
→1975Ellenwood House — Garrettsville, Portage County, Ohio
→1983Elliot House — Pataskala, Licking County, Ohio
→1973Elliott and Stoddard Halls, Miami University — Oxford, Butler County, Ohio
→1973Elliott Hall, Sturges Library, And Merrick Hall — Delaware, Delaware County, Ohio
→1976Elliott House — Remington, Hamilton County, Ohio
→1979Elmwood Place — Irwin, Union County, Ohio
→1980Elsinore Arch — Cincinnati, Hamilton County, Ohio
→2000Elson--Magnolia Flour Mill — Magnolia, Stark County, Ohio
→1979Ely Block — Elyria, Lorain County, Ohio
→2001Elyria Downtown--West Avenue Historic District — Elyria, Lorain County, Ohio
→1979Elyria Elks Club — Elyria, Lorain County, Ohio
→1979Elyria High School - Washington Building — Elyria, Lorain County, Ohio
→1982Emanuel Lutheran Church of Montra — Montra, Shelby County, Ohio
→2005Emery Hall — Wilberforce, Greene County, Ohio
→2016Emery, Abram, House — Zanesville, Muskingum County, Ohio
→1982Emmanuel Church — Sandusky, Erie County, Ohio
→1990Emmanuel's Evangelical Lutheran Church — Germantown, Montgomery County, Ohio
→1978Empire House — Stony Ridge, Wood County, Ohio
→1976Engels And Krudwig Wine Company Buildings — Sandusky, Erie County, Ohio
→1982Engels, Herman, House — Sandusky, Erie County, Ohio
→1982Engine House No. 1 — Sandusky, Erie County, Ohio
→1995Engine House No. 16 — Columbus, Franklin County, Ohio
→1975Engine House No. 3 — Sandusky, Erie County, Ohio
→2016Engine House No. 6 — Columbus, Franklin County, Ohio
→2007Engineers Club of Dayton — Dayton, Montgomery County, Ohio
→1979Englebry's Dry Goods — Vermilion, Erie County, Ohio
→1979Englebry's, Dr., Office — Vermilion, Erie County, Ohio
→1998Englewood Historic District — Toledo, Lucas County, Ohio
→1982English, William, House — Versailles, Darke County, Ohio
→1984Ensworth, Jeremiah, House — Cleveland, Cuyahoga County, Ohio
→1986Episcopal Church of the Ascension and Manse — Wellsville, Columbiana County, Ohio
→1977Episcopal Church of the Resurrection — Cincinnati, Hamilton County, Ohio
→1989Epley, Henry J., House — Canal Winchester, Franklin County, Ohio
→1979Erie County Bank Building — Vermilion, Erie County, Ohio
→1975Erie County Infirmary — Sandusky, Erie County, Ohio
→1982Erie County Jail — Sandusky, Erie County, Ohio
→1974Erie County Office Building — Sandusky, Erie County, Ohio
→1982Erie County Oil Products Co. — Sandusky, Erie County, Ohio
→1984Erie Railroad Cleveland Powerhouse — Cleveland, Cuyahoga County, Ohio
→1986Erie Terminal Building--Commerce Plaza Building — Youngstown, Mahoning County, Ohio
→2017Erieview Tower — Cleveland, Cuyahoga County, Ohio
→1980Erlich, F. W., House — Ironton, Lawrence County, Ohio
→1973Erwin Hall, Marietta College — Marietta, Washington County, Ohio
→1985Etna House — Ravenna, Portage County, Ohio
→1979Eubanks-Tytus House — Hillsboro, Highland County, Ohio
→2022Euclid Avenue Christian Church — Cleveland, Cuyahoga County, Ohio
→2002Euclid Avenue Historic District — Cleveland, Cuyahoga County, Ohio
→2007Euclid Avenue Historic District (Boundary Increase) — Cleveland, Cuyahoga County, Ohio
→1980Euclid Avenue Presbyterian Church — Cleveland, Cuyahoga County, Ohio
→2002Euclid Golf Allotment — Cleveland Heights, Cuyahoga County, Ohio
→2012Euclid Heights Historic District — Cleveland Heights, Cuyahoga County, Ohio
→1996Euclid, The--Seventy-First Street Building — Cleveland, Cuyahoga County, Ohio
→2019Eugene McKinley Memorial Pool — Portsmouth, Scioto County, Ohio
→1979Evangelical and Reformed Church — Vermilion, Erie County, Ohio
→1987Evangelical Church of Christ — Portsmouth, Scioto County, Ohio
→1984Evans House — Vinton, Gallia County, Ohio
→1986Evans--Holton--Owens House — Newark, Licking County, Ohio
→1980Evans, Richard W., House — Worthington, Franklin County, Ohio
→1980Evans, Wilson Bruce, House ★ NHL — Oberlin, Lorain County, Ohio
→1975Everal, John W., Farm Buildings — Westerville, Franklin County, Ohio
→1993Everett Historic District — Peninsula, Summit County, Ohio
→1982Ewington Academy — Ewington, Gallia County, Ohio
→1985Exchange Hotel — Sandusky, Erie County, Ohio
→2003Exposition Hall, Montgomery County Fairgrounds — Dayton, Montgomery County, Ohio
→1983Fabing, Frederick, House — Fremont, Sandusky County, Ohio
→1982Facer's Store — Sandusky, Erie County, Ohio
→1980Factory Site — Ironspot, Muskingum County, Ohio
→2006Fagin, Aaron, House — Monroe Township, Clermont County, Ohio
→2005Fairborn Theatre — Fairborn, Greene County, Ohio
→2008Fairfield County Children's Home — Lancaster, Fairfield County, Ohio
→2020Fairfield County Infirmary — Lancaster, Fairfield County, Ohio
→1990Fairhill Road Village Historic District — Cleveland, Cuyahoga County, Ohio
→1982Fairmont Avenue Historic District — Zanesville, Muskingum County, Ohio
→2015Fairmont Creamery Company Ice Cream Building — Cleveland, Cuyahoga County, Ohio
→1976Fairmount Boulevard District — Cleveland Heights, Cuyahoga County, Ohio
→1992Fairport Harbor West Breakwater Light — Fairport Harbor, Lake County, Ohio
→1971Fairport Marine Museum — Fairport Harbor, Lake County, Ohio
→2013Fairview Community Park Historic District — Fairview Park, Cuyahoga County, Ohio
→2010Fairview Public School Annex — Cincinnati, Hamilton County, Ohio
→1966Fallen Timbers Battlefield ★ NHL — Maumee, Lucas County, Ohio
→2000Falls River Road — Chagrin Falls, Cuyahoga County, Ohio
→2016Falls Stamping and Welding Building — Cuyahoga Falls, Summit County, Ohio
→1983Farmers Branch, State Bank of Ohio — Ripley, Brown County, Ohio
→1995Farmers National Bank — Plain City, Madison County, Ohio
→1986Fay, Charles, House — Wyoming, Hamilton County, Ohio
→1973Fayette County Courthouse — Washington Courthouse, Fayette County, Ohio
→1980Federal Building — Youngstown, Mahoning County, Ohio
→2006Federal Knitting Mills (Boundary Increase) — Cleveland, Cuyahoga County, Ohio
→2001Federal Knitting Mills Building — Cleveland, Cuyahoga County, Ohio
→1973Federal Land Office — Steubenville, Jefferson County, Ohio
→1976Federal Reserve Bank Of Cleveland — Cleveland, Cuyahoga County, Ohio
→1976Federalton — Stewart, Athens County, Ohio
→2009Feick Building — Sandusky, Erie County, Ohio
→1988Felkner--Anderson House — Ostrander, Delaware County, Ohio
→1984Felton School — Columbus, Franklin County, Ohio
→2017Fenway Hall — Cleveland, Cuyahoga County, Ohio
→1973Fenwick Club Annex — Cincinnati, Hamilton County, Ohio
→1978Ferguson, Andrew, House — West Lafayette, Coshocton County, Ohio
→1984Ferney, John, House — Lebanon, Warren County, Ohio
→1987Ferrell, Silas, House — Shiloh, Richland County, Ohio
→1974Ferrey, Aaron, House — Kent, Portage County, Ohio
→1975Ferris, Eliphalet, House — Mariemont, Hamilton County, Ohio
→1975Ferris, Joseph, House — Cincinnati, Hamilton County, Ohio
→1980Field, Walter, House — Cincinnati, Hamilton County, Ohio
→1987Fife, Harry E., House — Canton, Stark County, Ohio
→1978Fifth and Lawrence Streets Residential District — Ironton, Lawrence County, Ohio
→1990Fifth Avenue and North High Historic District — Columbus, Franklin County, Ohio
→1985Findlay Downtown Historic District — Findlay, Hancock County, Ohio
→1972Findlay Market Building — Cincinnati, Hamilton County, Ohio
→1979Fine Arts Building — Tiffin, Seneca County, Ohio
→1986Finley, Ebenezer, House — Buffalo, Guernsey County, Ohio
→1982Finney-Darrah House — Martin's Ferry, Belmont County, Ohio
→1992Fire Blocks Historic District — Dayton, Montgomery County, Ohio
→2011Firestone, Charles E., House — Canton, Stark County, Ohio
→1979First Baptist Church — Vermilion, Erie County, Ohio
→1978First Church of Christ in Euclid — East Cleveland, Cuyahoga County, Ohio
→1982First Church of Christ Scientist — Sandusky, Erie County, Ohio
→1978First Church of Christ, Scientist — Toledo, Lucas County, Ohio
→2003First Church of Christ, Scientist — Cleveland, Cuyahoga County, Ohio
→1975First Church Of Christ, Scientist — Elyria, Lorain County, Ohio
→1974First Concrete Street In U.S. — Bellefontaine, Logan County, Ohio
→1982First Congregational Church — Sandusky, Erie County, Ohio
→2000First Congregational Church — Marblehead, Ottawa County, Ohio
→2004First Congregational Church — Akron, Summit County, Ohio
→1979First Congregational Church And Lexington School — Lexington, Richland County, Ohio
→1975First Congregational Church of Cuyahoga Falls — Cuyahoga Falls, Summit County, Ohio
→1976First Congregational-Unitarian Church — Cincinnati, Hamilton County, Ohio
→1983First English Lutheran Church — Mansfield, Richland County, Ohio
→1980First German Methodist Episcopal Church — Cincinnati, Hamilton County, Ohio
→1976First Hancock County Courthouse — Findlay, Hancock County, Ohio
→2001First Ladies National Historic Site — Canton, Stark County, Ohio
→1983First Lutheran Church — Dayton, Montgomery County, Ohio
→1995First Methodist Church — Cleveland, Cuyahoga County, Ohio
→1979First Methodist Episcopal Church — Canton, Stark County, Ohio
→1985First Methodist Episcopal Church — Massillon, Stark County, Ohio
→1985First Methodist Episcopal Church of Alliance, Ohio — Alliance, Stark County, Ohio
→2006First Methodist Episcopal--Holy Trinity Greek Orthodox Church — Steubenville, Jefferson County, Ohio
→1982First National Bank and Trust Building — Lima, Allen County, Ohio
→1980First National Bank Building — Youngstown, Mahoning County, Ohio
→1979First National Bank Building — Elyria, Lorain County, Ohio
→1987First National Bank Building — Massillon, Stark County, Ohio
→2017First National Bank Building — Cincinnati, Hamilton County, Ohio
→2007First National Bank Tower — Akron, Summit County, Ohio
→1976First Presbyterian Church — Troy, Miami County, Ohio
→1990First Presbyterian Church — Napoleon, Henry County, Ohio
→1973First Presbyterian Church — Portsmouth, Scioto County, Ohio
→1978First Presbyterian Church — Warren, Trumbull County, Ohio
→1973First Presbyterian Church Of Maumee Chapel — Maumee, Lucas County, Ohio
→1985First Presbyterian Church of Wapakoneta — Wapakoneta, Auglaize County, Ohio
→1982First Reformed and First Lutheran Churches — Canton, Stark County, Ohio
→1973First Unitarian Church Of Marietta — Marietta, Washington County, Ohio
→1979First United Methodist Church — Elyria, Lorain County, Ohio
→1996First United Methodist Church — London, Madison County, Ohio
→2006First United Methodist Church — Woodsfield, Monroe County, Ohio
→1980First Universalist Church — Cincinnati, Hamilton County, Ohio
→1980First Universalist Church of Olmsted — North Olmsted, Cuyahoga County, Ohio
→1999Fisher, E.D., House — Bolivar, Tuscarawas County, Ohio
→1978Fitz Randolph-Rogers House — Hamilton, Butler County, Ohio
→1977Five Mile House — Zanesville, Muskingum County, Ohio
→1973Five Oaks — Massillon, Stark County, Ohio
→1993Fledderjohann, H. E., House, Doctor's Office and Summer Kitchen — New Knoxville, Auglaize County, Ohio
→1970Flint Ridge State Memorial — Brownsville, Licking County, Ohio
→1982Floral Hall — Bowling Green, Wood County, Ohio
→1976Floral Hall — Mount Gilead, Morrow County, Ohio
→1984Floraville Historic District — Lebanon, Warren County, Ohio
→1975Florence Corners School — Florence, Erie County, Ohio
→1978Flory, Joseph, House — Clayton, Montgomery County, Ohio
→1974Follett-Moss-Moss Residences — Sandusky, Erie County, Ohio
→1989Foor--Alspach House — Canal Winchester, Franklin County, Ohio
→1989Ford Motor Company Cincinnati Plant — Cincinnati, Hamilton County, Ohio
→1976Ford Motor Company Cleveland Plant — Cleveland, Cuyahoga County, Ohio
→2021Ford Motor Company Columbus Branch Assembly Plant — Columbus, Franklin County, Ohio
→2016Ford, Edward, Plate Glass Company Employee Relations Building — Rossford, Wood County, Ohio
→1975Foreaker Bridge — Graysville, Monroe County, Ohio
→1992Forest City Bank Building — Cleveland, Cuyahoga County, Ohio
→1976Forest City Brewery — Cleveland, Cuyahoga County, Ohio
→1998Forest Glen Estates Historic District — Boardman Township, Mahoning County, Ohio
→1986Forest Hill Historic District — Cleveland, Cuyahoga County, Ohio
→1998Forest Hill Park — East Cleveland, Cuyahoga County, Ohio
→2007Forest Hill Realty Sales Office — Cleveland Heights, Cuyahoga County, Ohio
→1989Forsythe--Puhl House — Maumee, Lucas County, Ohio
→1970Fort Amanda Site — Wapakoneta, Auglaize County, Ohio
→1966Fort Ancient ★ NHL — Lebanon, Warren County, Ohio
→1979Fort Ball-Railroad Historic Disrict — Tiffin, Seneca County, Ohio
→1980Fort Defiance Park — Defiance, Defiance County, Ohio
→1970Fort Hayes — Columbus, Franklin County, Ohio
→1974Fort Hill — North Olmsted, Cuyahoga County, Ohio
→1970Fort Hill State Park — Sinking Springs, Highland County, Ohio
→2019Fort Industry Square — Toledo, Lucas County, Ohio
→1970Fort Jefferson Site — Fort Jefferson, Darke County, Ohio
→1970Fort Laurens Site — Bolivar, Tuscarawas County, Ohio
→1969Fort Meigs ★ NHL — Perrysburg, Wood County, Ohio
→1998Fort Meigs Aboriginal--33WO08--33WO445 — Perrysburg, Wood County, Ohio
→1974Fort Piqua Hotel — Piqua, Miami County, Ohio
→1970Fort Recovery Site — Fort Recovery, Mercer County, Ohio
→1970Fort St. Clair Site — Eaton, Preble County, Ohio
→1982Fort, The — North Lewisburg, Union County, Ohio
→1992Foster--Gram House — Put-In-Bay, Ottawa County, Ohio
→2004Foster, Claud, House — Willowick, Lake County, Ohio
→2001Fostoria Downtown Historic District — Fostoria, Seneca County, Ohio
→1978Fostoria Mausoleum — Fostoria, Hancock County, Ohio
→1973Founders Hall, Heidelberg College — Tiffin, Seneca County, Ohio
→1990Fountain City Historic District — Bryan, Williams County, Ohio
→1997Fountain Hotel, The — St. Marys, Auglaize County, Ohio
→1982Fourth Street Historic District — Massillon, Stark County, Ohio
→1985Fowler Center Historic District — Fowler, Trumbull County, Ohio
→2002Fowler's Mills Historic District — Chardon, Geauga County, Ohio
→2006Fox Hollow — Washington Township, Montgomery County, Ohio
→1992Fox--Pope Farm — Welshfield, Geauga County, Ohio
→1982Fox's Brewery-Diamond Wine Co. — Sandusky, Erie County, Ohio
→1979France Hall — Tiffin, Seneca County, Ohio
→1988Frances Apartment Building — Canton, Stark County, Ohio
→1979FRANCIS, JOSEPH, IRON SURF BOAT — Vermilion, Erie County, Ohio
→1975Frank, Charles, House And Store — Valley City, Medina County, Ohio
→1989Franklin Boulevard Historic District — Cleveland, Cuyahoga County, Ohio
→1993Franklin Boulevard--West Clinton Avenue Historic District — Cleveland, Cuyahoga County, Ohio
→2006Franklin Boulevard--West Clinton Avenue Historic District (Boundary Increase) — Cleveland, Cuyahoga County, Ohio
→1987Franklin College Building No. 5 — New Athens, Harrison County, Ohio
→2013Franklin Hotel — Kent, Portage County, Ohio
→1974Franklin Park Conservatory — Columbus, Franklin County, Ohio
→1975Franklin Township Hall — Kent, Portage County, Ohio
→2005Franklinton Apartments at Broad and Hawkes — Columbus, Franklin County, Ohio
→2005Franklinton Apartments at State and May — Columbus, Franklin County, Ohio
→1973Franklinton Post Office — Columbus, Franklin County, Ohio
→1979Frantz House — Dublin, Franklin County, Ohio
→1983Fraser House — Mansfield, Richland County, Ohio
→1982Frasier, Thomas T. and Wesley B. Houses — Brookside, Belmont County, Ohio
→1976Frazee, Stephen, House — Valley View, Cuyahoga County, Ohio
→1979Fredericktown Presbyterian Church — Fredericktown, Knox County, Ohio
→1976Free Will Baptist Church Of Auburn — Auburn Corners, Geauga County, Ohio
→1975Freedom Congregational Church — Freedom, Portage County, Ohio
→2002French, Garnet B., House — Canton, Stark County, Ohio
→2003Freund--Heintz House — Cincinnati, Hamilton County, Ohio
→1975Fridley-Oman Farm — Marcy, Pickaway County, Ohio
→1979Friedlander, Abraham J., House — Cincinnati, Hamilton County, Ohio
→1970Friendly Grove — Piketon, Pike County, Ohio
→2009Friends Boarding School and Ohio Yearly Meetinghouse Historic District — Barnesville, Belmont County, Ohio
→1970Friends Meetinghouse — Mount Pleasant, Jefferson County, Ohio
→1974Froelich, John, House — Seven Hills, Cuyahoga County, Ohio
→1991Fuller House — Utica, Licking County, Ohio
→1999Fuller--Bramley House — Independence, Cuyahoga County, Ohio
→1980Fuller, Frances Ensign, House — Madison, Lake County, Ohio
→1973Fulton County Courthouse — Wauseon, Fulton County, Ohio
→1979Fulton Farm — Sidney, Shelby County, Ohio
→2021Fulton Lodge No. 248 — Delta, Fulton County, Ohio
→1979Fulton-Presbyterian Cemetery — Cincinnati, Hamilton County, Ohio
→1979Furnace Run Aqueduct — Everett, Summit County, Ohio
→1978Gabel, Daniel, House — Seven Hills, Cuyahoga County, Ohio
→1984Gaensslen, Phillip, House — Cleveland, Cuyahoga County, Ohio
→2014Gaetz Music House — Columbus, Franklin County, Ohio
→1979Galigher, James, House — Zanesville, Muskingum County, Ohio
→2014Gallagher Building — Youngstown, Mahoning County, Ohio
→2001Gallipolis Historic District — Gallipolis, Gallia County, Ohio
→1980Gallipolis Public Square and Garden Lots Historic District — Gallipolis, Gallia County, Ohio
→2000Gambier Historic District — Gambier, Knox County, Ohio
→1979Gantz Homestead — Grove City, Franklin County, Ohio
→1980Gardner House — Worthington, Franklin County, Ohio
→1979Garfield Library — Mentor, Lake County, Ohio
→2021Garfield Terrace Apartments — East Cleveland, Cuyahoga County, Ohio
→1986Garfield--Broad Apartments — Columbus, Franklin County, Ohio
→1978Garfield, Halsey, House — Sheffield, Lorain County, Ohio
→1975Garfield, James A., House — Hiram, Portage County, Ohio
→1978Garfield, Milton, House — Sheffield, Lorain County, Ohio
→2017Garfield, President James A., Memorial — Cleveland, Cuyahoga County, Ohio
→1974Garford, Arthur L., House — Elyria, Lorain County, Ohio
→1990Garlick, Richard, House — Youngstown, Trumbull County, Ohio
→1977Garst House — Greenville, Darke County, Ohio
→1982Garst, John, House — Loudonville, Ashland County, Ohio
→1980Garver Brothers Store — Strasburg, Tuscarawas County, Ohio
→1989Gasche, Charles, House — Wooster, Wayne County, Ohio
→1975Gaskins-Malany House — Withamsville, Clermont County, Ohio
→1978Gast, Matthias, House and General Store — Maria Stein, Mercer County, Ohio
→1974Gaston's Mill-Lock No. 36, Sandy And Beaver Canal District — Clarkson, Columbiana County, Ohio
→1991Gates Mills Historic District — Gates Mills, Cuyahoga County, Ohio
→1975Gates Mills Methodist Episcopal Church — Gates Mills, Cuyahoga County, Ohio
→1975Gates, Holsey, House — Bedford, Cuyahoga County, Ohio
→1986Gatewood — Gallipolis, Gallia County, Ohio
→1984Gayer, Jacob M., House — Akron, Summit County, Ohio
→1979Gayer, Jacob, House — Medina, Medina County, Ohio
→1989Gayman, Christian, House — Canal Winchester, Franklin County, Ohio
→1975Geeting Covered Bridge — Lewisburg, Preble County, Ohio
→2001Gelpi, Eleanor A., House — Dublin, Franklin County, Ohio
→1983Gendron, Peter, House — Toledo, Lucas County, Ohio
→2005General Hospital Nurses' Home — Cincinnati, Hamilton County, Ohio
→2001General U.S. Grant Bridge — Portsmouth, Scioto County, Ohio
→1976Genoa Town Hall — Genoa, Ottawa County, Ohio
→1978Georgetown Historic District — Georgetown, Brown County, Ohio
→1991Georgetown Public School — Georgetown, Brown County, Ohio
→1979Gerhart-Rust Residence — Tiffin, Seneca County, Ohio
→2008German Evangelical Protestant Cemetery Chapel — Cincinnati, Hamilton County, Ohio
→1974German Village — Columbus, Franklin County, Ohio
→1980German Village (Boundary Increase) — Columbus, Franklin County, Ohio
→1991German Village Historic District — Hamilton, Butler County, Ohio
→1987Gerrard, Stephen A., Mansion — Cincinnati, Hamilton County, Ohio
→1986Gertenslager Carriage and Wagon Company — Wooster, Wayne County, Ohio
→1987Gharky, George H., House — Portsmouth, Scioto County, Ohio
→2010Ghent Historic District — Ghent, Summit County, Ohio
→1985Gibson House — Jackson, Jackson County, Ohio
→1974Giddings, Joshua Reed, Law Office ★ NHL — Jefferson, Ashtabula County, Ohio
→1984Gifford, Dr. William, House — Cleveland, Cuyahoga County, Ohio
→1980Gilbert House — Worthington, Franklin County, Ohio
→1982Gilbert Row — Cincinnati, Hamilton County, Ohio
→1980Gilbert--Wilcox House — Worthington, Franklin County, Ohio
→1983Gilbert-Sinton Historic District — Cincinnati, Hamilton County, Ohio
→1984Gilbert, F.A., House — Mansfield, Richland County, Ohio
→1980Gilbert, Jane, House — Madison, Lake County, Ohio
→1979Gilbert, Philip E., Houses — Dayton, Montgomery County, Ohio
→1979Gilboa Main Street Historic District — Gilboa, Putnam County, Ohio
→1979Gilchrist, Capt., House — Vermilion, Erie County, Ohio
→1979Gilchrist, Capt., Sr., House — Vermilion, Erie County, Ohio
→1976Gilcrist House — Marysville, Union County, Ohio
→1992Gill--Luchsinger--Bahnsen House and Barn — Port Clinton, Ottawa County, Ohio
→1986Gill--Morris Farm — Circleville, Pickaway County, Ohio
→1980Gill, H., House — Madison, Lake County, Ohio
→1997Gill, John, Farmstead — Millersport, Fairfield County, Ohio
→1975Gillett-Shoemaker-Welsh House — Waterville, Lucas County, Ohio
→1982Gish Farmhouses — Rittman, Wayne County, Ohio
→1972Glamorgan — Alliance, Stark County, Ohio
→1993Gleason, Edmund, Farm (Boundary Increase) — Valley View, Cuyahoga County, Ohio
→1978Gleason, Edmund, House — Valley View, Cuyahoga County, Ohio
→1997Glen Echo Historic District — Columbus, Franklin County, Ohio
→2003Glencoe-Auburn Hotel and Clecoe-Auburn Place Row Houses — Cincinnati, Hamilton County, Ohio
→2001Glendale Cemetery — Akron, Summit County, Ohio
→1976Glendale Historic District ★ NHL — Glendale, Hamilton County, Ohio
→1975Glendale Police Station — Glendale, Hamilton County, Ohio
→2023Glendale Steps — Akron, Summit County, Ohio
→1970Glendower — Lebanon, Warren County, Ohio
→1990Glenford Bank — Glenford, Perry County, Ohio
→2018Glenn, John, Boyhood Home — New Concord, Muskingum County, Ohio
→1988Glidden, Francis K., House — Cleveland, Cuyahoga County, Ohio
→1994Globe Iron Works Building — Cleveland, Cuyahoga County, Ohio
→2013Globe Machine and Stamping Company — Cleveland, Cuyahoga County, Ohio
→1979Glynnwood Catholic Church — GLynnwood, Auglaize County, Ohio
→1970Gnadenhutten Massacre Site — Gnadenhutten, Tuscarawas County, Ohio
→1982Godfrey-Johnson House — Sandusky, Erie County, Ohio
→1980Godfrey, Sen. Thomas J., House — Celina, Mercer County, Ohio
→2018Godman, H.C., Co. Building — Columbus, Franklin County, Ohio
→1985Godwin--Knowles House — East Liverpool, Columbiana County, Ohio
→1986Golden Eagle Wine Cellars — Middle Bass Island, Ottawa County, Ohio
→1978Golden Lamb — Lebanon, Warren County, Ohio
→1978Goldsmith, Jacob, House — Cleveland, Cuyahoga County, Ohio
→1982Goldsmith, Moses, Building — Cincinnati, Hamilton County, Ohio
→2005Goll Homestead — Archbold, Fulton County, Ohio
→1984Goodall Building — Cincinnati, Hamilton County, Ohio
→2005Gooding House and Tavern — Orange Township, Delaware County, Ohio
→1975Goodwin, Dr. Erastus, House — Burton, Geauga County, Ohio
→1973Goodyear Airdock — Akron, Summit County, Ohio
→2014Goodyear Hall--Ohio Savings and Trust Company — Akron, Summit County, Ohio
→2013Goodyear Tire and Rubber Company Headquarters — Akron, Summit County, Ohio
→1985Gordon Square Building — Cleveland, Cuyahoga County, Ohio
→2002Gordon Square Historic District — Cleveland, Cuyahoga County, Ohio
→1980Gorsuch, Ernest J., House — Zanesville, Muskingum County, Ohio
→1973Goshorn, Sir Alfred T., House — Cincinnati, Hamilton County, Ohio
→2010Gothic Building, The — Akron, Summit County, Ohio
→1979Gothic Revival House — Fredericktown, Knox County, Ohio
→1977Gottschall, Oscar M., House — Dayton, Montgomery County, Ohio
→2005Gould Block — Lorain, Lorain County, Ohio
→1974Governor's Inn — Maumee, Lucas County, Ohio
→1982Grace Church — Cincinnati, Hamilton County, Ohio
→1982Grace Episcopal Church — Sandusky, Erie County, Ohio
→1984Grace Reformed Church — Akron, Summit County, Ohio
→1982Graefe, Henry, House — Sandusky, Erie County, Ohio
→2008Grafton School — Grafton, Lorain County, Ohio
→2010Grafton-Rockwood Historic District — Dayton, Montgomery County, Ohio
→1984Graham, William, House — Wayne, Wood County, Ohio
→2012Grand Army of the Republic Memorial Hall — Ironton, Lawrence County, Ohio
→1982Grand Lake St. Marys Lighthouse — Celinda, Mercer County, Ohio
→1975Grand Pacific Hotel — Olmsted Falls, Cuyahoga County, Ohio
→1978Grandview Cemetery — Chillicothe, Ross County, Ohio
→2010Grant Deming's Forest Hill Allotment Historic District — Cleveland Heights, Cuyahoga County, Ohio
→2023Grant School — Zanesville, Muskingum County, Ohio
→2016Grant--Deneau Tower — Dayton, Montgomery County, Ohio
→1998Grant, A. G., Homestead — Grove City, Franklin County, Ohio
→1976Grant, Ulysses S., Boyhood Home ★ NHL — Georgetown, Brown County, Ohio
→1978Grant, William H., House — Middleport, Meigs County, Ohio
→1980Granville Historic District — Granville, Licking County, Ohio
→2009Graphic Arts Building — Dayton, Montgomery County, Ohio
→1975Gray-Coulton House — Mentor, Lake County, Ohio
→1990Great American Racing Derby — Sandusky, Erie County, Ohio
→1979Great Hall — Tiffin, Seneca County, Ohio
→1979Great Lakes Historical Society Marine Museum — Vermilion, Erie County, Ohio
→1982Great Southern Hotel and Theatre — Columbus, Franklin County, Ohio
→1979Great Western Schoolhouse — St. Clairsville, Belmont County, Ohio
→1979Greek Revival Commercial Building — Fredericktown, Knox County, Ohio
→1979Greek Revival Farmhouse, Old — Fredericktown, Knox County, Ohio
→1990Green Island Light — Put-in-Bay, Ottawa County, Ohio
→2007Green Lawn Abbey — Columbia, Franklin County, Ohio
→1982Green Plain Monthly Meetinghouse — South Charleston, Clark County, Ohio
→2013Green Township High School — Smithville, Wayne County, Ohio
→1976Green, Lucius, House — Perry, Lake County, Ohio
→1978Greene Township Center — North Bloomfield, Trumbull County, Ohio
→1989Greenhills Historic District — Greenhills, Hamilton County, Ohio
→1980Greenlawn Cemetery Chapel — Portsmouth, Scioto County, Ohio
→1976Greenville Mausoleum — Greenville, Darke County, Ohio
→1984Greenville South Broadway Commercial District — Greenville, Darke County, Ohio
→1994Greenwood Cemetery — Hamilton, Butler County, Ohio
→1979Greenwood Farm — Delaware, Delaware County, Ohio
→1979Gregg House — Wellington, Lorain County, Ohio
→1984Gregory House — New London, Huron County, Ohio
→1999Greyhound Bus Station — Cleveland, Cuyahoga County, Ohio
→1985Griffin, A. B.,--O. H. Griffin House — Ravenna, Portage County, Ohio
→1987Griffin, Alexander B., House — Ravenna, Portage County, Ohio
→1989Griffith, James, House — Canal Winchester, Franklin County, Ohio
→1995Griggs Grange No. 1467 — Jefferson, Ashtabula County, Ohio
→1982Grinnell Mill Historic District — Yellow Springs, Greene County, Ohio
→1993Griswold Memorial Young Women's Christian Association — Columbus, Franklin County, Ohio
→1978Griswold, Peck, House — Maumee, Lucas County, Ohio
→2016Gross, L.N., Company Building — Kent, Portage County, Ohio
→1976Groveport Log Houses — Groveport, Franklin County, Ohio
→2009Groveport School — Groveport, Franklin County, Ohio
→1978Groveport Town Hall Historic Group — Groveport, Franklin County, Ohio
→1995Groveport United Methodist Church — Groveport, Franklin County, Ohio
→1996Gruen Watch Company--Time Hill — Cincinnati, Hamilton County, Ohio
→1979Gruenwald Convent — Cassella, Mercer County, Ohio
→1973Guernsey County Courthouse — Cambridge, Guernsey County, Ohio
→1978Gummer House — Dayton, Montgomery County, Ohio
→1976Gunckel's Town Plan Historic District — Germantown, Montgomery County, Ohio
→1979Gunn House — Wellington, Lorain County, Ohio
→1976Gurney-Kochheiser House — Bellville, Richland County, Ohio
→1975Gustavus Center Historic District — Gustavus and vicinity, Trumbull County, Ohio
→1974Gwinn Estate — Bratenahl, Cuyahoga County, Ohio
→1979Gwynne Building — Cincinnati, Hamilton County, Ohio
→1983Hackenberg, Harvey, House — Lakewood, Cuyahoga County, Ohio
→1982Haddon Hall — Cincinnati, Hamilton County, Ohio
→1989Haffey, Parley, Farm Complex — Canal Winchester, Franklin County, Ohio
→1974Haines House — Alliance, Stark County, Ohio
→1982Haines, Frank, House — Sabina, Clinton County, Ohio
→1979Hale, Elijah, Residence — Bath, Summit County, Ohio
→1973Hale, Jonathan, Homestead — Bath, Summit County, Ohio
→2002Hall Park Allotment Historic District — Akron, Summit County, Ohio
→1983Halle Building — Cleveland, Cuyahoga County, Ohio
→2005Halle's Shaker Square — Cleveland, Cuyahoga County, Ohio
→1985Hamer's General Store — Mechanicsburg, Champaign County, Ohio
→1986Hamilton Catholic High School — Hamilton, Butler County, Ohio
→1978Hamilton County Memorial Building — Cincinnati, Hamilton County, Ohio
→1995Hamilton Historic Civic Center — Hamilton, Butler County, Ohio
→1983Hamilton Park Historic District — Franklin, Franklin County, Ohio
→1980Hamilton-Ickes House — Adena, Jefferson County, Ohio
→1992Hamilton, Gilbert H., House — Columbus, Franklin County, Ohio
→1979Hamilton, J. L., Residence — Amlin, Franklin County, Ohio
→2015Hamlet, The — Columbus, Franklin County, Ohio
→1970Hanby, Benjamin, House — Westerville, Franklin County, Ohio
→1987Hancock and Dow Building — Mansfield, Richland County, Ohio
→1973Hancock County Courthouse — Findlay, Hancock County, Ohio
→2013Hanford Village George Washington Carver Addition Historic District — Columbus, Franklin County, Ohio
→1986Hangar, The — Beachwood, Cuyahoga County, Ohio
→1982Hanitch-Huffman House — Dayton, Montgomery County, Ohio
→1979Hanna House — Columbus, Franklin County, Ohio
→2001Hanna--Kenty House — Lisbon, Columbiana County, Ohio
→1974Hanna, Howard M., Jr., House — Bratenahl, Cuyahoga County, Ohio
→1979Hanna, Leonard C., Jr., Estate — Kirtland Hills, Lake County, Ohio
→1980Hannaford, Samuel, House — Cincinnati, Hamilton County, Ohio
→1977Hanoverton Canal Town District — Hanoverton, Columbiana County, Ohio
→1978Hanson House — Maumee, Lucas County, Ohio
→1980Hanson Machinery Company — Tiffin, Seneca County, Ohio
→1980Hardesty, Ralph, Stone House — Norwich, Muskingum County, Ohio
→1979Hardin County Courthouse — Kenton, Hardin County, Ohio
→1976Harding Tomb — Marion, Marion County, Ohio
→1975Harding-Jones Paper Company District — Excello, Butler County, Ohio
→1966Harding, Warren G., House ★ NHL — Marion, Marion County, Ohio
→1974Harmar Historic District — Marietta, Washington County, Ohio
→1993Harmar Historic District (Boundary Increase) — Marietta, Washington County, Ohio
→1975Harmon, Francis E., House — Ashtabula, Ashtabula County, Ohio
→2001Harmony Hill Dairy House — Williamsburg, Clermont County, Ohio
→2000Harp Apartments — Cleveland, Cuyahoga County, Ohio
→1988Harper Mausoleum and Harper, George W., Memorial Entrance — Cedarville, Greene County, Ohio
→1980Harper-Cosgrave Block — Zanesville, Muskingum County, Ohio
→1982Harper, Rice, House — Sandusky, Erie County, Ohio
→1980Harper, Samuel, Stone House — New Concord, Guernsey County, Ohio
→1978Harper, William Rainey, Log House — New Concord, Muskingum County, Ohio
→1975Harpersfield Covered Bridge — Harpersfield, Ashtabula County, Ohio
→1976Harra Covered Bridge — Watertown, Washington County, Ohio
→1973Harris, Dr. John, Dental School — Bainbridge, Ross County, Ohio
→1997Harris, Franklin, Farmstead — Salem, Columbiana County, Ohio
→1980Harris, Stephen R., House — Bucyrus, Crawford County, Ohio
→1978Harris, William B., House — Zanesville, Muskingum County, Ohio
→1974Harrison County Courthouse — Cadiz, Harrison County, Ohio
→1993Harrison National Bank — Cadiz, Harrison County, Ohio
→1975Harrison-Landers House — Newtown, Hamilton County, Ohio
→1972Harrison, Gen. William Henry, Headquarters — Columbus, Franklin County, Ohio
→1970Harrison, William Henry, Tomb State Memorial — North Bend, Hamilton County, Ohio
→1976Harshaville Covered Bridge — Harshaville, Adams County, Ohio
→1979Harshey, John, Residence — Bath Center, Summit County, Ohio
→1976Harshman Covered Bridge — Fairhaven, Preble County, Ohio
→1983Harshman, Charles, House — Southington Township, Trumbull County, Ohio
→2023Hart, Edward, House — Cincinnati, Hamilton County, Ohio
→1973Hart, Gideon, House — Westerville, Franklin County, Ohio
→1980Hart, Lucy, House — Worthington, Franklin County, Ohio
→1979Hart's Drug Store — Vermilion, Erie County, Ohio
→2018Hartman Hotel — Columbus, Franklin County, Ohio
→2022Hartman Stock Farm Historic District — Columbus, Franklin County, Ohio
→2007Hartong, Levi J., House and Farm — Green, Summit County, Ohio
→1980Hartville Hotel — Hartville, Stark County, Ohio
→1987Harvard Company--Weber Dental Manufacturing Company — Canton, Stark County, Ohio
→2002Harvard School — Cleveland, Cuyahoga County, Ohio
→2010Harvey One-Room School — Bucyrus, Crawford County, Ohio
→1978Harvey, Eli, House — Clarksville, Clinton County, Ohio
→1977Harvey, Elizabeth, Free Negro School — Harveysburg, Warren County, Ohio
→1978Harwood Block — Conneaut, Ashtabula County, Ohio
→1975Haskins, Liberty Whitcomb, House — Waterville, Lucas County, Ohio
→2008Hatch, George, House — Cincinnati, Hamilton County, Ohio
→1974Hathaway, Lot, House — East Claridon, Geauga County, Ohio
→1978Hatton Farm — Harveysburg, Warren County, Ohio
→1974Hawthorn Hill ★ NHL — Oakwood, Montgomery County, Ohio
→1976Hay-McKinney and Bingham-Hanna House — Cleveland, Cuyahoga County, Ohio
→2009Hayden Building — Columbus, Franklin County, Ohio
→1973Haydenville Historic Town — Haydenville, Hocking County, Ohio
→1966Hayes, Rutherford B., House ★ NHL — Fremont, Sandusky County, Ohio
→1976Hayesville Opera House — Hayesville, Ashland County, Ohio
→1976Hayner, Mary Jane, House — Troy, Miami County, Ohio
→1978Headley Inn., Smith House And Farm — Zanesville, Muskingum County, Ohio
→1976Heckler Farmhouse — Crestline, Crawford County, Ohio
→1980Hedges-Hunter-Keller-Bacon Gristmill — Tiffin, Seneca County, Ohio
→1975Heeter-Russo House — Grand Rapids, Wood County, Ohio
→1986Heights Rockfeller Building — Cleveland Heights, Cuyahoga County, Ohio
→1986Helen Chapel — Youngstown, Mahoning County, Ohio
→1979Heller, Edward, Residence — Ghent, Summit County, Ohio
→1975Helmick Covered Bridge — Blissfield, Coshocton County, Ohio
→1999Helmick Mill Covered Bridge — Malta, Morgan County, Ohio
→1989Helpman--Chaney House — Canal Winchester, Franklin County, Ohio
→1980Hemann, Joseph A., House — Cincinnati, Hamilton County, Ohio
→1982Hemminger Saloon — Sandusky, Erie County, Ohio
→2001Henderson, Dr. David W., House — Marysville, Union County, Ohio
→1976Henderson, John, House — West Andover, Ashtabula County, Ohio
→1980Hendry, Francis, House — Madison, Lake County, Ohio
→2000Henn, Albert W., Mansion — Euclid, Cuyahoga County, Ohio
→2003Henninger, Phillip, House — Parma, Cuyahoga County, Ohio
→1979Henny Barn — Flat Rock, Seneca County, Ohio
→1973Henry County Courthouse — Napoleon, Henry County, Ohio
→1981Henry County Sheriff's Residence and Jail — Napoleon, Henry County, Ohio
→1978Henry, Robert W., House — Parma Heights, Cuyahoga County, Ohio
→2005Hercules Motors Corporation Industrial Complex — Canton, Stark County, Ohio
→2013Herold Building — Cleveland, Cuyahoga County, Ohio
→1982Herr, Christian S., House — Lockbourne, Franklin County, Ohio
→1983Herrington, John, House and Herrington Bethel Church — Mechanicstown, Carroll County, Ohio
→1980Herrold, Thomas Jefferson, House and Store — Athens, Athens County, Ohio
→1979Herron Gymnasium — Oxford, Butler County, Ohio
→1979Hershey, J., Residence — Ghent, Summit County, Ohio
→1978Hertzler, Daniel, House — Springfield, Clark County, Ohio
→1986Hess, Elmer, House — Wyoming, Hamilton County, Ohio
→1975Hessler Court Wooden Pavement — Cleveland, Cuyahoga County, Ohio
→1979Heter Farm — Bellevue, Seneca County, Ohio
→1979Hewson-Gutting House — Cincinnati, Hamilton County, Ohio
→1987Heyne--Zimmerman House — Columbus, Franklin County, Ohio
→1980Hidley, James P., Cottage — Reily, Butler County, Ohio
→1979Higby House — Chillicothe, Ross County, Ohio
→1979Higgins, H. A., Building — Columbus, Franklin County, Ohio
→2000Higginsport School — Higginsport, Brown County, Ohio
→2014High and Gay Streets Historic District — Columbus, Franklin County, Ohio
→1986High House — Delaware, Delaware County, Ohio
→2004High Street Commercial Block — Hamilton, Butler County, Ohio
→2014High Street Commercial Block (Boundary Increase) — Hamilton, Butler County, Ohio
→1980Highbank Farm — Chillicothe, Ross County, Ohio
→1978Highland County Courthouse — Hillsboro, Highland County, Ohio
→2002Highland Egg and Poultry Company Building — Hillsboro, Highland County, Ohio
→1978Hildreth Covered Bridge — Marietta, Washington County, Ohio
→1997Hill, James Delos, House — Montpelier, Williams County, Ohio
→1994Hill, James, House — Cleveland, Cuyahoga County, Ohio
→1973Hill, Jediah, Covered Bridge — Cincinnati, Hamilton County, Ohio
→1998Hillcrest Hotel — Toledo, Lucas County, Ohio
→1987Hilliard Apartment Building — Cleveland, Cuyahoga County, Ohio
→1988Hilliard Methodist Episcopal Church — Hilliard, Franklin County, Ohio
→1984Hillsboro Historic Business District — Hillsboro, Highland County, Ohio
→1982Hinde & Dauch Paper Co. — Sandusky, Erie County, Ohio
→1982Hinde & Dauch Paper Co. — Sandusky, Erie County, Ohio
→1982Hinde & Dauch Paper Co. — Sandusky, Erie County, Ohio
→1982Hinde, James J., House — Sandusky, Erie County, Ohio
→1976Hine, Horace L., House — Mantua, Portage County, Ohio
→1976Hirons-Brown House — Buford, Highland County, Ohio
→1999Hise, Daniel Howell, House — Salem, Columbiana County, Ohio
→2008Historic Associate Reformed Church and Cemetery — Morning Sun, Preble County, Ohio
→1996Historic Northwest District — Delaware, Delaware County, Ohio
→1976Hizey Covered Bridge — Pickerington, Fairfield County, Ohio
→1990Hoadley, George, Jr., House — Cincinnati, Hamilton County, Ohio
→1989Hobart Circle Historic District — Troy, Miami County, Ohio
→1989Hobart, E. A., House — Troy, Miami County, Ohio
→1989Hobart, William, Vacation House — Troy, Miami County, Ohio
→2007Hocking Valley Coal Company Town Historic District — The Plaines, Athens County, Ohio
→1988Hocking Valley Railway Historic District — Nelsonville, Athens County, Ohio
→1978Hoffman House — Crestline, Crawford County, Ohio
→1978Hoffner Historic District — Cincinnati, Hamilton County, Ohio
→1990Holgate Avenue Historic District — Defiance, Defiance County, Ohio
→1980Hollencamp House — Xenia, Greene County, Ohio
→1980Hollister-Parry House — Woodsfield, Monroe County, Ohio
→1974Holmes County Courthouse And Jail — Millersburg, Holmes County, Ohio
→1982Holy Angels Church — Sandusky, Erie County, Ohio
→1979Holy Cross Church, Rectory and School — Columbus, Franklin County, Ohio
→1991Holy Cross Lithuanian Roman Catholic Church — Dayton, Montgomery County, Ohio
→1978Holy Cross Monastery and Chapel — Cincinnati, Hamilton County, Ohio
→1979Holy Family Catholic Church — Frenchtown, Darke County, Ohio
→1979Holy Rosary Catholic Church — St. Marys, Auglaize County, Ohio
→1976Holy Rosary Church — Cleveland, Cuyahoga County, Ohio
→1973Home Building Association Bank — Newark, Licking County, Ohio
→1980Home for the Aged Deaf — Westerville, Franklin County, Ohio
→1977Honam, John, House — Lakewood, Cuyahoga County, Ohio
→1974Hood-Simmons House — Perrysburg, Wood County, Ohio
→1979Hoodin Building — Cincinnati, Hamilton County, Ohio
→1980Hooper Building — Cincinnati, Hamilton County, Ohio
→2013Hoover Company Historic District — North Canton, Stark County, Ohio
→1979Hoover Farm — North Canton, Stark County, Ohio
→1973Hope Furnace — Zaleski, Vinton County, Ohio
→1982Hopkins, Benjamin F., Stone Building — Kent, Portage County, Ohio
→1979Hopkins, Roswell, Residence — Ghent, Summit County, Ohio
→1974Horseshoe Mound — Portsmouth, Scioto County, Ohio
→1980Horsey-Barthelmas Farm — Circleville, Pickaway County, Ohio
→1979Horton, Capt. Charles, House — Vermilion, Erie County, Ohio
→1979Hosack House — Fredericktown, Knox County, Ohio
→1976Hosford House — Galion, Crawford County, Ohio
→1974Hosford, John, House — Monroeville, Huron County, Ohio
→1980Hostetter Inn — Lisbon, Columbiana County, Ohio
→1982Hotel Argonne — Lima, Allen County, Ohio
→1985Hotel Ashtabula — Ashtabula, Ashtabula County, Ohio
→1980Hotel Central — Worthington, Franklin County, Ohio
→1987Hotel Courtland — Canton, Stark County, Ohio
→1980Hotel Harding — Marion, Marion County, Ohio
→2014Hotel Manchester — Middletown, Butler County, Ohio
→2009Hotel Metropole — Cincinnati, Hamilton County, Ohio
→2005Hotel Rieger — Sandusky, Erie County, Ohio
→1998Hotel Statler — Cleveland, Cuyahoga County, Ohio
→1989House at 1022 West Main Street — Troy, Miami County, Ohio
→1989House at 121 South Ridge — Troy, Miami County, Ohio
→1989House at 129 South Ridge — Troy, Miami County, Ohio
→1989House at 145 South Ridge — Troy, Miami County, Ohio
→1989House at 203 Penn Road — Troy, Miami County, Ohio
→1979House at 624 Washinton St. — Vermilion, Erie County, Ohio
→1986House at 753 East Broad Street — Columbus, Franklin County, Ohio
→1973House Of Four Pillars — Maumee, Lucas County, Ohio
→1982House of Wills — Cleveland, Cuyahoga County, Ohio
→1979House on Huron Ave. — Vermilion, Erie County, Ohio
→1974House, Col. Erastus, House — Rays Corner, Ashtabula County, Ohio
→1996Housley, R. A., House — Grand Rapids, Wood County, Ohio
→1979Houston House — Cincinnati, Hamilton County, Ohio
→1978Howard, Adam, House — Galion, Crawford County, Ohio
→1974Howard, C. R., House — Aurora, Portage County, Ohio
→1976Howe Tavern — College Corner, Butler County, Ohio
→2019Howell and Anna Powell Farm — Fairfield, Butler County, Ohio
→1973Hower Mansion — Akron, Summit County, Ohio
→1974Hoyt Block — Cleveland, Cuyahoga County, Ohio
→1979Hruby Conservatory of Music — Cleveland, Cuyahoga County, Ohio
→2014Hubbard Cooke Block — Cleveland, Cuyahoga County, Ohio
→1973Hubbard, Col. William, House — Ashtabula, Ashtabula County, Ohio
→1982Hubbard, Lester, House — Sandusky, Erie County, Ohio
→1982Hubbard, S. B., House — Sandusky, Erie County, Ohio
→1980Huber, Dr. H., Block — Ottawa, Putnam County, Ohio
→1987Hudson Avenue Historic District — Newark, Licking County, Ohio
→1973Hudson Historic District — Hudson, Summit County, Ohio
→1989Hudson Historic District (Boundary Increase) — Hudson, Summit County, Ohio
→1977Hueston, Matthew, House — Hamilton, Butler County, Ohio
→1975Huffman Covered Bridge — Middleburg, Noble County, Ohio
→1971Huffman Field ★ NHL — Fairborn, Greene County, Ohio
→1982Huffman Historic District — Dayton, Montgomery County, Ohio
→1994Hughes Manor — Middletown, Butler County, Ohio
→1976Hughes School — Hamilton, Butler County, Ohio
→1982Hulbert House and McAlpin Bridal Cottage — Cincinnati, Hamilton County, Ohio
→1988Hulburt, Halsey, Homestead — Seville, Medina County, Ohio
→1979Hull Place — Newark, Licking County, Ohio
→1970Hull-Wolcott House — Maumee, Lucas County, Ohio
→1978Hull, Isaac, Store — Maumee, Lucas County, Ohio
→1973Hull, Jasper G., House — Findlay, Hancock County, Ohio
→1982Hull, Patrick, House — Oneida, Carroll County, Ohio
→2002Humberger House — Clinton, Summit County, Ohio
→1980Hummel, George, House — Cincinnati, Hamilton County, Ohio
→1976Hune Covered Bridge — Dart, Washington County, Ohio
→1991Hune, William, Farm — Reno, Washington County, Ohio
→2004Hunt--Forman Farm — Franklin, Warren County, Ohio
→1993Hunt--Wilke Farm — Cuyahoga Falls, Summit County, Ohio
→1980Hunter, James, Stone House — Adamsville, Muskingum County, Ohio
→1985Hunter, Norvall, Farm — Mechanicsburg, Champaign County, Ohio
→1980Hunter, William, House — Tiffin, Seneca County, Ohio
→1982Hunting Lodge Farm — Oxford, Butler County, Ohio
→1979Huntington Grange — Wellington, Lorain County, Ohio
→1979Huntington Inn, Old — Wellington, Lorain County, Ohio
→1979Huntington Public School — Wellington, Lorain County, Ohio
→1979Huntington Township Hall — Wellington, Lorain County, Ohio
→1980Huntington, Franz, House — Bexley, Franklin County, Ohio
→1979Huntington, John, Pumping Tower — Bay Village, Cuyahoga County, Ohio
→1993Hunts Corners — Monroeville, Huron County, Ohio
→2004Huron County Children's Home — Norwalk, Huron County, Ohio
→1974Huron County Courthouse And Jail — Norwalk, Huron County, Ohio
→1991Huron Harbor Light — Huron, Erie County, Ohio
→2011Huron School — Huron, Erie County, Ohio
→1993Huron--Superior Streets Warehouse--Produce Historic District — Toledo, Lucas County, Ohio
→1974Hurst, William E., House — Avon, Lorain County, Ohio
→1983Hurth Hotel — Portsmouth, Scioto County, Ohio
→2009Hyde Park Methodist Episcopal Church — Cincinnati, Hamilton County, Ohio
→1976I.O. of R.M. Building — Shawnee, Perry County, Ohio
→1980Ida Street Viaduct — Cincinnati, Hamilton County, Ohio
→1976Iddings, Benjamin, Log House — Troy, Miami County, Ohio
→1992Ideal Department Store Building — Massillon, Stark County, Ohio
→1993Idora Park — Youngstown, Mahoning County, Ohio
→1983Ijams, Joseph, House — West Rushville, Fairfield County, Ohio
→1980Ikirt House — East Liverpool, Columbiana County, Ohio
→1979Immaculate Conception Catholic Church Complex — Celina, Mercer County, Ohio
→1976Immaculate Conception Church — Grafton, Lorain County, Ohio
→1978Immaculate Conception Church, School, and Rectory — Cincinnati, Hamilton County, Ohio
→1979Immaculate Conception Rectory at Botkins — Botkins, Shelby County, Ohio
→1983Imperial Glass Company — Bellaire, Belmont County, Ohio
→1977Independence Presbyterian Church — Independence, Cuyahoga County, Ohio
→2003Independent Order of Odd Fellows Temple — Sandusky, Erie County, Ohio
→1984Independent Order of Oddfellows, Dayton Lodge No. 273 — Dayton, Montgomery County, Ohio
→1986Independent School District No. 2 Building — Steubenville, Jefferson County, Ohio
→1970Indian Mill — Upper Sandusky, Wyandot County, Ohio
→1974Indian Point Fort — Painesville, Lake County, Ohio
→1979Indian Run Cemetery Stone Walls — Dublin, Franklin County, Ohio
→1980Indianola Junior High School — Columbus, Franklin County, Ohio
→1975Ingalls Building — Cincinnati, Hamilton County, Ohio
→1980Ingersoll, Cyrus J., House — Madison, Lake County, Ohio
→2009Inglewood Historic District — Cleveland Heights, Cuyahoga County, Ohio
→1994Insco Apartments Building — Dayton, Montgomery County, Ohio
→1973Inscription Rock — Kelleys Island, Erie County, Ohio
→1976Inselruhe — Put-in-Bay, Ottawa County, Ohio
→2002Inter County Highway 360 — Logan, Hocking County, Ohio
→1972Interurban Bridge — Waterville, Lucas County, Ohio
→1993Inverness Club — Toledo, Lucas County, Ohio
→1996Ira Apartments — Toledo, Lucas County, Ohio
→1984Ireland, Joseph, House — Cleveland, Cuyahoga County, Ohio
→1992Isham, John, Farmstead — Waterville, Lucas County, Ohio
→1982Isham, John, House — Waterville, Lucas County, Ohio
→2008Island House — Port Clinton, Ottawa County, Ohio
→1986Iuka Ravine Historic District — Columbus, Franklin County, Ohio
→1984Iutzi, Christian, Farm — Trenton, Butler County, Ohio
→1989Izant, Grace Goulder, House — Hudson, Summit County, Ohio
→1979J & M Trading Post — Leesville, Crawford County, Ohio
→1979J & M Trading Post - Annex — Leesville, Crawford County, Ohio
→1982Jackson Jr. High School — Sandusky, Erie County, Ohio
→1975Jackson, Andrew, House — Akron, Summit County, Ohio
→1990Jacob's Church — Miamisburg, Montgomery County, Ohio
→1986Jacobs, Felix A., House — Columbus, Franklin County, Ohio
→1983Jaeger Machine Company Office Building — Columbus, Franklin County, Ohio
→1979Jaite Mill Historic District — Brecksville, Cuyahoga County, Ohio
→1966James A. Garfield National Historic Site ★ NHL — Mentor, Lake County, Ohio
→1980James, Charles Worth, House — Logan, Hocking County, Ohio
→2007Jamestown Opera House — Jamestown, Greene County, Ohio
→1979Jarvis House — Chesterville, Morrow County, Ohio
→1986Jay's Lunch — Youngstown, Mahoning County, Ohio
→1982Jefferson Avenue Historic District — Columbus, Franklin County, Ohio
→1976Jefferson Schoolhouse — Indian Hill, Hamilton County, Ohio
→1981Jefferson Town Hall — Jefferson, Ashtabula County, Ohio
→2001Jeffrey Manufacturing Company Office Building — Columbus, Franklin County, Ohio
→1983Jeffrey, Malcolm, House — Bexley, Franklin County, Ohio
→1974Jenkins-Perry House — Milan, Erie County, Ohio
→1984Jennings Apartments — Cleveland, Cuyahoga County, Ohio
→2018Jersey Independent Order of Odd Fellows Hall — Jersey, Licking County, Ohio
→1979Jewett, Frank, House — Oberlin, Lorain County, Ohio
→1978John Bright No. 1 Iron Bridge — Carroll, Fairfield County, Ohio
→1975John, Jehu, House — Harrison, Hamilton County, Ohio
→1975Johnson Island Civil War Prison and Fort Site ★ NHL — Danbury, Ottawa County, Ohio
→1984Johnson Road Covered Bridge — Petersburg, Jackson County, Ohio
→1992Johnson Steel Street Railway Company General Offices Building — Lorain, Lorain County, Ohio
→1986Johnson--Campbell House — Columbus, Franklin County, Ohio
→1974Johnson-Humrickhouse House — Coshocton, Coshocton County, Ohio
→1979Johnson, Dustin, Residence — Bath, Summit County, Ohio
→1979Johnson, E. J., House — Elyria, Lorain County, Ohio
→1976Johnson, John, Farm — Hiram, Portage County, Ohio
→1982Johnson, Thomas, House — Plainfield, Coshocton County, Ohio
→1982Johnston-Crossland House — Zanesville, Muskingum County, Ohio
→1976Johnston, William C., House And General Store — Burlington, Lawrence County, Ohio
→2003Johnstown Jail — Johnstown, Licking County, Ohio
→1984Jones Hall, Youngstown State University — Youngstown, Mahoning County, Ohio
→1996Jones Home for Children — Cleveland, Cuyahoga County, Ohio
→2012Jones Home Subdivisions Historic District — Cleveland, Cuyahoga County, Ohio
→1987Jones--Read--Touvelle House — Wauseon, Fulton County, Ohio
→1976Jones-Bowman House — Columbiana, Columbiana County, Ohio
→1976Jones-Cutler House — Jasper, Pike County, Ohio
→2003Jones, Elam, Public House — Hartford, Trumbull County, Ohio
→1985Jones, Elijah Pelton, House — Findlay, Hancock County, Ohio
→1980Jones, John J., House — Madison, Lake County, Ohio
→1978Jones, W. H., Mansion — Columbus, Franklin County, Ohio
→2010Joseph and Feiss Clothcraft Shops, The — Cleveland, Cuyahoga County, Ohio
→1986Joseph--Cherrington House — Columbus, Franklin County, Ohio
→1983Joyce, Jacob O., House — Dayton, Montgomery County, Ohio
→1998Judy Chapel — Washington Court House, Fayette County, Ohio
→2009Julienne Girls Catholic High School — Dayton, Montgomery County, Ohio
→1995Jyurovat Farmstead — Peninsula, Summit County, Ohio
→1997Kahiki, The — Columbus, Franklin County, Ohio
→1993Kaiser, John, House — Marietta, Washington County, Ohio
→1982Karamu House — Cleveland, Cuyahoga County, Ohio
→1979Karrer Barn — Dublin, Franklin County, Ohio
→1979Karrer, Henry, House — Dublin, Franklin County, Ohio
→1983Kauber, Warren F., Funeral Home — Pataskala, Licking County, Ohio
→1986Kauffman, Linus B., House — Columbus, Franklin County, Ohio
→1986Kaufman, Frank J., House — Columbus, Franklin County, Ohio
→2021Kauke and McCurdy Block — Van Wert, Van Wert County, Ohio
→1979Kearns, George and Edward, Houses — Zanesville, Muskingum County, Ohio
→1979Keeler, Diadatus, House — Galena, Delaware County, Ohio
→1979Kelley, Barney, House — Washington Courthouse, Fayette County, Ohio
→2017Kelley, William, Hardware Store--Hayesville Odd Fellows Hall — Hayesville, Ashland County, Ohio
→1975Kelleys Island South Shore District — Kelleys Island, Erie County, Ohio
→1976Kellog, Ethol, House — Centerville, Montgomery County, Ohio
→1979Kellogg House — Cincinnati, Hamilton County, Ohio
→1980Kellogg, John, House and Barn — Madison, Lake County, Ohio
→1975Kelly Family Home — Dayton, Montgomery County, Ohio
→1975Kemp, Lewis, House — Dayton, Montgomery County, Ohio
→1997Kendall, Virginia, State Park Historic District — Peninsula, Summit County, Ohio
→2013Kendel Building — Cleveland, Cuyahoga County, Ohio
→2006Kenilworth Avenue Historic District — Dayton, Montgomery County, Ohio
→1989Kennedy Apartments and Commercial Block — Cleveland, Cuyahoga County, Ohio
→1975Kennedy Stone House — North Salem, Guernsey County, Ohio
→1984Kennel, John Sr., Farm — Trenton, Butler County, Ohio
→1984Kennel, John, Jr., Farm — Trenton, Butler County, Ohio
→1974Kent Industrial District — Kent, Portage County, Ohio
→2001Kent Jail — Kent, Portage County, Ohio
→1978Kent, Charles House — Kent, Portage County, Ohio
→1979Kent, J., Residence — Bath, Summit County, Ohio
→1973Kent, Zeno, House — Aurora, Portage County, Ohio
→1984Kenton Courthouse Square Historic District — Kenton, Hardin County, Ohio
→1983Kenton Public Library — Kenton, Hardin County, Ohio
→1980Kenton-Hunt Farm — Springfield, Clark County, Ohio
→1975Kenyon College — Gambier, Knox County, Ohio
→1982Kerber's Marine Grocery — Sandusky, Erie County, Ohio
→1983Kern, Rufus A., House — Mansfield, Richland County, Ohio
→1979Kerr, Benjamin F., House — Grand Rapids, Wood County, Ohio
→1979Kestler Building — Cincinnati, Hamilton County, Ohio
→1977Kettering, Charles F., House ★ NHL — Kettering, Montgomery County, Ohio
→1982Keyt, Gideon, House — Gates Mills, Cuyahoga County, Ohio
→1977Kidwell Covered Bridge — Truetown, Athens County, Ohio
→2004Kies, Lewis, House — Cleveland, Cuyahoga County, Ohio
→1980Kilbourn Commercial Building — Worthington, Franklin County, Ohio
→1979Kilbourn, William, House — Dublin, Franklin County, Ohio
→1995Kilgore Union Presbyterian Church — Carrollton, Carroll County, Ohio
→2012Kilgour, Frederick G., House — Upper Arlington, Franklin County, Ohio
→1976Kilpi Hall — Conneaut, Ashtabula County, Ohio
→1985Kimball House — Mechanicsburg, Champaign County, Ohio
→1975Kimball, Addison, House — Madison, Lake County, Ohio
→1974Kimball, Lemuel II, House — Madison, Lake County, Ohio
→1980Kimball, Solomon, House — Madison, Lake County, Ohio
→1980Kindleberger, Frederick, Stone House and Barn — Clarington, Monroe County, Ohio
→1987Kindra, W. H., Apartments — Cleveland, Cuyahoga County, Ohio
→2022King Records Studio Buildings — Cincinnati, Hamilton County, Ohio
→1982King-Phillips-Deibel House — Medina, Medina County, Ohio
→2008King, Ahimaaz, House — Kings Mills, Warren County, Ohio
→1979King, Dr., House — Fredericktown, Knox County, Ohio
→1995King, George W., Mansion--Etowah — Marion, Marion County, Ohio
→1989King, William, House — Canal Winchester, Franklin County, Ohio
→2021Kingwood Center — Mansfield, Richland County, Ohio
→1973Kinney, Aaron, House — Portsmouth, Scioto County, Ohio
→1988Kinney, Eli, House — Portsmouth, Scioto County, Ohio
→1999Kinney, James, Farmstead — Belmont, Belmont County, Ohio
→2013Kinsey, The — Cincinnati, Hamilton County, Ohio
→1971Kinsman House — Warren, Trumbull County, Ohio
→2013Kirby Road School — Cincinnati, Hamilton County, Ohio
→1978Kirby, James, Mill — West Richfield, Summit County, Ohio
→1986Kirby, Josiah, House — Wyoming, Hamilton County, Ohio
→1975Kirker Covered Bridge — West Union, Adams County, Ohio
→1975Kirker, Gov. Thomas, Homestead — West Union, Adams County, Ohio
→1986Kirkwood, Joseph, House — Bridgeport, Belmont County, Ohio
→1969Kirtland Temple ★ NHL — Kirtland, Lake County, Ohio
→1976Kirtland, Jared P., House — Poland, Mahoning County, Ohio
→2011Kiser Mansion — Saint Paris, Champaign County, Ohio
→1979Kishman Fish Company Buildings — Vermilion, Erie County, Ohio
→1974Kister Mill — Millbrook, Wayne County, Ohio
→1979Kittinger, David, Residence — Bath, Summit County, Ohio
→1982Klaus Block — Lima, Allen County, Ohio
→1979Knapp, William, House — Valley View, Cuyahoga County, Ohio
→2018Knights of Pythias Hall — New Madison, Darke County, Ohio
→1980Knowlton Covered Bridge — Rinards Mills, Monroe County, Ohio
→1978Knowlton, Dr. William A., House — Brecksville, Cuyahoga County, Ohio
→1973Knox County Courthouse — Mount Vernon, Knox County, Ohio
→1986Knox County Infirmary — Mount Vernon, Knox County, Ohio
→1984Koch, John E., Jr., House — Millersburg, Holmes County, Ohio
→1977Koehne--Poast Farm — Germantown, Montgomery County, Ohio
→1985Kokosing House — Gambier, Knox County, Ohio
→1979Kossuth Colony Historic District — Dayton, Montgomery County, Ohio
→1985Krause Building--Otto Moser's Cafe — Cleveland, Cuyahoga County, Ohio
→1983Krause, John, House — Mansfield, Richland County, Ohio
→1986Kress Building — Youngstown, Mahoning County, Ohio
→2011Krippendorf Estate — Perintown, Clermont County, Ohio
→1980Krippendorf-Dittman Company — Cincinnati, Hamilton County, Ohio
→2011Kroger Barnes Graf, Gretchen, House — Indian Hill, Hamilton County, Ohio
→1992Krug House — Union, Montgomery County, Ohio
→1982Krumberg, Theodore, Building — Cincinnati, Hamilton County, Ohio
→1982Krumm House — Columbus, Franklin County, Ohio
→1982Kuebeler-Stang Block — Sandusky, Erie County, Ohio
→1982Kuebeler, August, House — Sandusky, Erie County, Ohio
→1974Kuenzer, Joseph II, House — Independence, Cuyahoga County, Ohio
→1978Kuhns, Benjamin F., Building — Dayton, Montgomery County, Ohio
→1988Kulas, E. J., Estate Historic District — Gates Mills, Cuyahoga County, Ohio
→1980Kumler, Elias, House — Oxford, Butler County, Ohio
→2001Kundtz, Theodor, Company Building — Cleveland, Cuyahoga County, Ohio
→1976Kunkle Log House — Kunkle, Williams County, Ohio
→1999La Tosca Flats — Cincinnati, Hamilton County, Ohio
→1987Labold House and Gardens — Portsmouth, Scioto County, Ohio
→1978Ladd's Tavern — Madison, Lake County, Ohio
→1978Lafayette Lodge No. 79 — Zanesville, Muskingum County, Ohio
→1980Lafee Building — Dayton, Montgomery County, Ohio
→1975Lagonda Club Building — Springfield, Clark County, Ohio
→2017Lagonda National Bank — Springfield, Clark County, Ohio
→1979Laird Hall — Tiffin, Seneca County, Ohio
→2020Lake County National Bank Building — Painesville, Lake County, Ohio
→1984Lake Hamilton Dam — Struthers, Mahoning County, Ohio
→1982Lake Shore & Michigan Southern Railroad Station — Jefferson, Ashtabula County, Ohio
→1993Lake Shore and Michigan Southern (LS&MS) Railroad Depot--Wauseon — Wauseon, Fulton County, Ohio
→1975Lake Shore And Michigan Southern Passenger Depot — Conneaut, Ashtabula County, Ohio
→1975Lake Shore And Michigan Southern Railroad Depot — Sandusky, Erie County, Ohio
→1978Lake Shore and Michigan Southern RR Depot and Freight House — Mentor, Lake County, Ohio
→2015Lake Shore Bank and Cleveland Public Library St. Clair Branch — Cleveland, Cuyahoga County, Ohio
→1976Lake Township School — Uniontown, Stark County, Ohio
→1982Lakefork School — Jeromesville, Ashland County, Ohio
→1983Lakeside Historic District — Lakeside, Ottawa County, Ohio
→1984Lamberson-Markley Houses — Canal Lewisville, Coshocton County, Ohio
→1980Lambert-Parent House — Union City, Darke County, Ohio
→2010Lambert, Jeremiah, House and Barn — Ghent, Summit County, Ohio
→1983Lancaster Historic District — Lancaster, Fairfield County, Ohio
→1987Lancaster Methodist Episcopal Camp Ground Historic District — Lancaster, Fairfield County, Ohio
→1979Lancaster West Main Street Historic District — Lancaster, Fairfield County, Ohio
→1987Landes, Samuel, House — Lockbourne, Franklin County, Ohio
→1982Landmark Tavern — Canton, Stark County, Ohio
→1979Landt Building — Cincinnati, Hamilton County, Ohio
→1973Lane-Hooven House — Hamilton, Butler County, Ohio
→1982Lane, Ebenezer, House — Sandusky, Erie County, Ohio
→1980Lane's Mill Historic Buildings — Oxford, Butler County, Ohio
→1969Langdon House — Cincinnati, Hamilton County, Ohio
→1991Lange Hotel — West Alexandria, Preble County, Ohio
→1975Langston, John Mercer, House ★ NHL — Oberlin, Lorain County, Ohio
→1976Langstroth Cottage ★ NHL — Oxford, Butler County, Ohio
→2000Lanning, T., & Co. Department Store — Dennison, Tuscarawas County, Ohio
→1979Lansdowne House — Greenville, Darke County, Ohio
→1974Lanterman Mill — Youngstown, Mahoning County, Ohio
→2011LaSalle Theater Building — Cleveland, Cuyahoga County, Ohio
→1995Lasalle, Koch and Company Department Store — Toledo, Lucas County, Ohio
→1978Lash, William D., House — Zanesville, Muskingum County, Ohio
→1991Latty, Judge Alexander, House — Defiance, Defiance County, Ohio
→1985Laughlin, Homer, House — East Liverpool, Columbiana County, Ohio
→1975Laundon, Thomas W., House — Elyria, Lorain County, Ohio
→1987Laurel Homes Historic District — Cincinnati, Hamilton County, Ohio
→2018Lavin, Carl and Audrey, House — Canton, Stark County, Ohio
→2002Law, Henry, Farm Historic District — Uhrichsville, Harrison County, Ohio
→1984Lawndale Farm Complex — Circleville, Pickaway County, Ohio
→2015Lawnfield--James A. Garfield Estate (Additional Documentation and Boundary Clarification) — Mentor, Lake County, Ohio
→1979Lawrence, William, House — Bellefontaine, Logan County, Ohio
→1979Lay, Samuel, House — Olmsted Falls, Cuyahoga County, Ohio
→1986Layman, Christopher C., Law Office — Woodville, Sandusky County, Ohio
→1982Lea Block — Sandusky, Erie County, Ohio
→1979League Park — Cleveland, Cuyahoga County, Ohio
→1984Lebanon Academy — Lebanon, Warren County, Ohio
→1984Lebanon Cemetery Entrance Arch — Lebanon, Warren County, Ohio
→1984Lebanon Cemetery Superintendent's House — Lebanon, Warren County, Ohio
→1984Lebanon Commercial District — Lebanon, Warren County, Ohio
→1982Lebol, John, House, Smokehouse and Springhouse — Bolivar, Tuscarawas County, Ohio
→1979Lee, Samuel, House — Coshocton, Coshocton County, Ohio
→1979Leesville Town Hall — Leesville, Crawford County, Ohio
→1975Leftwich House — Greenville, Darke County, Ohio
→1989Lehman, Abraham, Farmhouse — Canal Winchester, Franklin County, Ohio
→2017Lehman, John H., High School — Canton, Stark County, Ohio
→1979Leipsic City Hall — Leipsic, Putnam County, Ohio
→1970Leo Petroglyph — Coalton, Jackson County, Ohio
→1979Leppert, C., Barn — Dublin, Franklin County, Ohio
→1979Leppert, C., Cabin — Dublin, Franklin County, Ohio
→1979Leppert, C., Farm — Dublin, Franklin County, Ohio
→2000Lerner Building — Cleveland, Cuyahoga County, Ohio
→1979Lersch, John, House — Elyria, Lorain County, Ohio
→1980Levering Hall — Mount Gilead, Morrow County, Ohio
→1998Levy, Harry Milton, House — Cincinnati, Hamilton County, Ohio
→1986Levy, Soloman, House — Columbus, Franklin County, Ohio
→1980Lewis, Dr. A. C., House — Winchester, Adams County, Ohio
→1993Lewis, Samuel, Farmhouse — Radnor, Delaware County, Ohio
→1982Lewis, Samuel, House — Mansfield, Richland County, Ohio
→1983Libbey, Edward D., House ★ NHL — Toledo, Lucas County, Ohio
→2011Libbey, Edward Drummond, High School — Toledo, Lucas County, Ohio
→1984Liberty Theatre — Youngstown, Mahoning County, Ohio
→1973Licking County Courthouse — Newark, Licking County, Ohio
→1979Ligget, J., Residence — Ghent, Summit County, Ohio
→1994Liggett--Freedlander House — Wooster, Wayne County, Ohio
→1989Light, Jacob, House — Washington Court House, Fayette County, Ohio
→1980Lilienthal Building — Zanesville, Muskingum County, Ohio
→1982Lilley, Robert D., House — Hillsboro, Highland County, Ohio
→2006Lilly House — Westlake, Cuyahoga County, Ohio
→1983Lillybanks — Cincinnati, Hamilton County, Ohio
→1982Lima Cleaning and Pressing Company — Lima, Allen County, Ohio
→1979Lima Memorial Hall — Lima, Allen County, Ohio
→2003Lima Pennsylvania Railroad Passenger Depot — Lima, Allen County, Ohio
→2002Lima Stadium — Lima, Allen County, Ohio
→2001Limbach Block Historic District — Clinton, Summit County, Ohio
→1978Limestone Vale — Delaware, Delaware County, Ohio
→1983Linaweaver, Dr. Albert, House — Findlay, Hancock County, Ohio
→1992Lincoln Theatre — Columbus, Franklin County, Ohio
→1982Lind Arcade — Zanesville, Muskingum County, Ohio
→2014Linden Community and Recreation Center — Dayton, Montgomery County, Ohio
→1978Lindner Building — Cleveland, Cuyahoga County, Ohio
→1985Lindsey Building — Dayton, Montgomery County, Ohio
→1982Linneman Building — Lima, Allen County, Ohio
→2016Lion Knitting Mills — Cleveland, Cuyahoga County, Ohio
→2014Liquid Carbonic Corporation Dry Ice Plant — Cleveland, Cuyahoga County, Ohio
→1979Lisbon Historic District — Lisbon, Columbiana County, Ohio
→1994Livingston, Alexander W., House — Reynoldsburg, Franklin County, Ohio
→1973Lloyd, John Uri, House — Cincinnati, Hamilton County, Ohio
→1979Lock No. 26 — Ira, Summit County, Ohio
→1979Lock No. 27 — Everett, Summit County, Ohio
→1979Lock No. 28 — Peninsula, Summit County, Ohio
→1979Lock No. 29 and Aqueduct — Peninsula, Summit County, Ohio
→1979Lock No. 30 and Feeder Dam — Peninsula, Summit County, Ohio
→1979Lock No. 31 — Peninsula, Summit County, Ohio
→1979Lock No. 32 — Boston, Summit County, Ohio
→1979Lock No. 33 — Boston, Summit County, Ohio
→1979Lock No. 34 — Sagamore Hills, Summit County, Ohio
→1979Lock No. 35 — Sagamore Hills, Summit County, Ohio
→1979Lock No. 37 and Spillway — Valley View, Cuyahoga County, Ohio
→1979Lock No. 38 and Spillway — Valley View, Cuyahoga County, Ohio
→1979Lock No. 39 and Spillway — Valley View, Cuyahoga County, Ohio
→1979Lock Tender's House and Inn — Valley View, Cuyahoga County, Ohio
→1975Lockington Covered Bridge — Lockington, Shelby County, Ohio
→1969Lockington Locks Historical Area — Lockington, Miami County, Ohio
→1974Lockville Canal Locks — Lockville, Fairfield County, Ohio
→1974Lockwood, J. C., House — Milan, Erie County, Ohio
→1979Loew-Define Grocery Store and Home — Navarre, Stark County, Ohio
→1973Loew's Theatre — Akron, Summit County, Ohio
→1980Logan City Hall — Logan, Hocking County, Ohio
→1973Logan County Courthouse — Bellefontaine, Logan County, Ohio
→2010Logan Historic District — Logan, Hocking County, Ohio
→1980Lombardy Apartment Building — Cincinnati, Hamilton County, Ohio
→1985London Commercial Business Historic District — London, Madison County, Ohio
→1982Long and Third Commercial Building — Columbus, Franklin County, Ohio
→1987Long--Mueller House — Kettering, Montgomery County, Ohio
→1987Long--Romspert House — Oakwood, Montgomery County, Ohio
→1990Longenecker, Doctor, Office Building — Worthington, Franklin County, Ohio
→2014Longwood Manor — Macedonia, Summit County, Ohio
→2006Look About Lodge — Bentleyville, Cuyahoga County, Ohio
→1975Looker, Othniel, House — Harrison, Hamilton County, Ohio
→1994Lorain Avenue Commercial Historic District — Cleveland, Cuyahoga County, Ohio
→2023Lorain Carnegie Public Library — Lorain, Lorain County, Ohio
→1975Lorain County Courthouse — Elyria, Lorain County, Ohio
→1987Lorain Fire Station No. 1 — Lorain, Lorain County, Ohio
→1978Lorain Lighthouse — Lorain, Lorain County, Ohio
→1994Lorain Station Historic District — Cleveland, Cuyahoga County, Ohio
→1992Lorain YMCA Building — Lorain, Lorain County, Ohio
→1976Lorain-Carnegie Bridge — Cleveland, Cuyahoga County, Ohio
→1999Lord, Addison, House — Elyria, Lorain County, Ohio
→1982Lotz, Henry, Stone — Sandusky, Erie County, Ohio
→2011Louisville Historic District — Louisville, Stark County, Ohio
→1986Lovejoy, Carrie, House — Columbus, Franklin County, Ohio
→2009Loveridge, Richard and Ann, House — Mount Vernon, Knox County, Ohio
→1976Lowellville Railroad Station — Lowellville, Mahoning County, Ohio
→1988Lower Price Hill Historic District — Cincinnati, Hamilton County, Ohio
→1995Lower Prospect--Huron Historic District — Cleveland, Cuyahoga County, Ohio
→2005Lower Prospect--Huron Historic District (Boundary Increase) — Cleveland, Cuyahoga County, Ohio
→1985Lowler's Tavern — Mechanicsburg, Champaign County, Ohio
→2017Lowrie, S. Gale and Agnes P., House — Cincinnati, Hamilton County, Ohio
→2016Lubal Manufacturing and Distributing Company, The — Columbus, Franklin County, Ohio
→1973Lucas County Courthouse and Jail — Toledo, Lucas County, Ohio
→1997Lucas County Hospital and Nurse's Home — Toledo, Lucas County, Ohio
→1974Ludwig, Isaac R., Historical Mill — Providence, Lucas County, Ohio
→1975Luelleman, William, House — New Bremen, Auglaize County, Ohio
→1986Luethstrom--Hurin House — Wyoming, Hamilton County, Ohio
→1974Lundy, Benjamin, House ★ NHL — Mt. Pleasant, Jefferson County, Ohio
→1979LuNeack House — Cincinnati, Hamilton County, Ohio
→1985Lunkenheimer, Frederick, House — Cincinnati, Hamilton County, Ohio
→2003Lutz--Martin Farm — Bath, Summit County, Ohio
→1973Lutz's Tavern — Painesville, Lake County, Ohio
→1975Lyceum Village Square And German Wallace College — Berea, Cuyahoga County, Ohio
→1995Lyle, Samuel, Log House — Seaman, Highland County, Ohio
→1980Lyman, William, House — Madison, Lake County, Ohio
→1976Lynchburg Covered Bridge — Lynchburg, Clinton County, Ohio
→1979Lynnwood Farm — Johnstown, Licking County, Ohio
→1976Lytle Park Historic District — Cincinnati, Hamilton County, Ohio
→1978MacDonell House — Lima, Allen County, Ohio
→1998Mace, Henry, House — Chillicothe, Ross County, Ohio
→1978Macedonia Church — Burlington, Lawrence County, Ohio
→1980Mackinaw Historic District — Franklin, Warren County, Ohio
→1976Macksville Tavern — Peru, Huron County, Ohio
→1976Macomb, Mary Worthington, House — Chillicothe, Ross County, Ohio
→1974Mad River Block — Sandusky, Erie County, Ohio
→1979Madam Fredin's Eden Park School and Neighboring Row House — Cincinnati, Hamilton County, Ohio
→2022Madeira Railroad Depot — Madeira, Hamilton County, Ohio
→1983Madison and Woodburn Historic District — Cincinnati, Hamilton County, Ohio
→1998Madison Avenue Historic District — Toledo, Lucas County, Ohio
→1973Madison County Courthouse — London, Madison County, Ohio
→1979Madison Seminary And Home — Madison, Lake County, Ohio
→1975Madison-Stewart Historic District — Cincinnati, Hamilton County, Ohio
→1990Magnolia--Wade Park Historic District — Cleveland, Cuyahoga County, Ohio
→1985Magruder Building — Mechanicsburg, Champaign County, Ohio
→1974Mahoning County Courthouse — Youngstown, Mahoning County, Ohio
→1980Mahoning National Bank Building — Youngstown, Mahoning County, Ohio
→1983Main and Third Street Cluster — Cincinnati, Hamilton County, Ohio
→1980Main Building School — Wilmington, Clinton County, Ohio
→2009Main Exchange Historic District — Akron, Summit County, Ohio
→1972Main House, Spring Hill — Massillon, Stark County, Ohio
→1979Main Street Buildings — Springfield, Clark County, Ohio
→2000Main Street Buildings (Boundary Increase) — Springfield, Clark County, Ohio
→2014Main Street Commercial Historic District — Middletown, Butler County, Ohio
→1989Main Street Historic District — Spring Valley, Greene County, Ohio
→1980Main Street Historic District — Bowling Green, Wood County, Ohio
→1992Main Street Historic District — Genoa, Ottawa County, Ohio
→2017Main Theatre — Mt. Healthy, Hamilton County, Ohio
→2003Main--Market Historic District — Akron, Summit County, Ohio
→2012Main--Third Street Buildings — Cincinnati, Hamilton County, Ohio
→1989MAJESTIC ★ NHL — Cincinnati, Hamilton County, Ohio
→1979Majestic Theatre — Chillicothe, Ross County, Ohio
→1973Malabar Farm — Lucas, Richland County, Ohio
→1987Malio House — Cleveland, Cuyahoga County, Ohio
→1982Mallory, Ogden, House — Sandusky, Erie County, Ohio
→1979Maltby, Henry, House — Oxford, Butler County, Ohio
→1966Manasseh Cutler Hall, Ohio University ★ NHL — Athens, Athens County, Ohio
→2019Manse Hotel and Manse Hotel Annex — Cincinnati, Hamilton County, Ohio
→1986Mansfield Savings Bank — Mansfield, Richland County, Ohio
→1983Mansfield Woman's Club — Mansfield, Richland County, Ohio
→1983Mansfield, Judge, House — Mansfield, Richland County, Ohio
→2023Mantua Center District — Mantua Center, Portage County, Ohio
→2013Mantua Center School — Mantua, Portage County, Ohio
→1974Mantua Station Brick Commercial District — Mantua, Portage County, Ohio
→1990Maple-Dell — Salem, Mahoning County, Ohio
→1977Maplewood — Chesapeake, Lawrence County, Ohio
→1984Maplewood Sanitorium — Lebanon, Warren County, Ohio
→1969Marblehead Lighthouse — Marblehead, Ottawa County, Ohio
→1982March, George, House — Sandusky, Erie County, Ohio
→1978March, George, House — Chagrin Falls, Cuyahoga County, Ohio
→1979Mardot Antique Shop — Cincinnati, Hamilton County, Ohio
→1979Maria Stein Catholic Church and Rectory — Maria Stein, Mercer County, Ohio
→1976Maria Stein Convent — Maria Stein, Mercer County, Ohio
→1979Mariemont Historic District — Mariemont, Hamilton County, Ohio
→1974Marietta Historic District — Marietta, Washington County, Ohio
→2001Marietta Historic District (Boundary Decrease) — Marietta, Washington County, Ohio
→1995Marion Cemetery Receiving Vault — Marion, Marion County, Ohio
→1974Marion County Courthouse — Marion, Marion County, Ohio
→2007Marion County Telephone Company Building — Marion, Marion County, Ohio
→1996Marion Township School District No. 3 — Findlay, Hancock County, Ohio
→2007Marion Township Sub-District #8 School — Marion, Marion County, Ohio
→2019Marion Women's Club Home — Marion, Marion County, Ohio
→1990Mark Road Bridge — Staunton, Fayette County, Ohio
→1975Market Square — Miamisburg, Montgomery County, Ohio
→1992Market Street Section, Retaining Wall and Water Trough — Steubenville, Jefferson County, Ohio
→1982Marks-Family House — Delphos, Allen County, Ohio
→2008Marlow Theatre — Ironton, Lawrence County, Ohio
→1986Marmon, Martin, House — Zanesfield, Logan County, Ohio
→1979Marquart-Mercer Farm — Springfield, Clark County, Ohio
→1980Marsh, George H., Homestead and the Marsh Foundation School — Van Wert, Van Wert County, Ohio
→1987Marsh, Joseph, House — Portsmouth, Scioto County, Ohio
→1979Marshall, David, House — Dublin, Franklin County, Ohio
→1982Marshall, James E., House — Sandusky, Erie County, Ohio
→1982Martin Block and Kibby Block — Lima, Allen County, Ohio
→1979Martin House — Cincinnati, Hamilton County, Ohio
→1999Martin, Brooke and Anna E. House — Canton, Stark County, Ohio
→1975Martin, Henry, Farm — Ripley, Brown County, Ohio
→1978Martindale, Samuel, House — Englewood, Montgomery County, Ohio
→1999Marting Hotel — Ironton, Lawrence County, Ohio
→1974Martinsville Road Covered Bridge — Martinsville, Clinton County, Ohio
→1987Marvin Memorial Library — Shelby, Richland County, Ohio
→1978Marysville Historic District — Marysville, Union County, Ohio
→1979Mason House — Coal Run, Washington County, Ohio
→1995Mason, Frank H., House — Akron, Summit County, Ohio
→1975Mason, James, House — Mentor, Lake County, Ohio
→1975Mason, John Wesley, Gothic Cottage — Braceville, Trumbull County, Ohio
→2000Masonic Lodge #472 — Zaleski, Vinton County, Ohio
→1974Masonic Temple — Kent, Portage County, Ohio
→1985Masonic Temple — Mechanicsburg, Champaign County, Ohio
→1997Masonic Temple — Columbus, Franklin County, Ohio
→1997Masonic Temple — Youngstown, Mahoning County, Ohio
→2008Masonic Temple — Springfield, Clark County, Ohio
→1990Masonic Temple Building — Zanesville, Muskingum County, Ohio
→1979Masonic Temple Building — Vermilion, Erie County, Ohio
→2017Masonic Temple Price Hill Lodge, No. 524 — Cincinnati, Hamilton County, Ohio
→1982Massillon Cemetery Building — Massillon, Stark County, Ohio
→1974Mather, Flora Stone, College District — Cleveland, Cuyahoga County, Ohio
→1973Mathews House — Painesville, Lake County, Ohio
→1980Mattoon--Woodrow House — Worthington, Franklin County, Ohio
→1974Maumee Historic District — Maumee, Lucas County, Ohio
→1973Maumee Sidecut — Maumee, Lucas County, Ohio
→1998Maumee Theater — Maumee, Lucas County, Ohio
→1984Maumee Uptown Historic District — Maumee, Lucas County, Ohio
→2010May 4, 1970, Kent State Shootings Site — Kent, Portage County, Ohio
→2020May Company — Cleveland, Cuyahoga County, Ohio
→1986May Realty Building — Mansfield, Richland County, Ohio
→1996May, David and Mary, House — Cincinnati, Hamilton County, Ohio
→1980Mayer, S. C., House — Cincinnati, Hamilton County, Ohio
→2013Mayfield Theatre Building, The — Cleveland, Cuyahoga County, Ohio
→2005McBean, Daniel, Farmstead — Wellsville, Columbiana County, Ohio
→2004McCafferty Run Farmstead — Chillocothe, Ross County, Ohio
→1987McCafferty, William, Farmhouse — Mt. Sterling, Fayette County, Ohio
→1984McCarthy-Blosser-Dillon Building — Logan, Hocking County, Ohio
→1980McClelland, Harry S., House — Zanesville, Muskingum County, Ohio
→1975McColly Covered Bridge — Bloom Center, Logan County, Ohio
→1979McConnelsville Historic District — McConnelsville, Morgan County, Ohio
→1970McCook, Daniel, House — Carrollton, Carroll County, Ohio
→1982McCorkle, Almon G., House — Lordstown, Trumbull County, Ohio
→2001McCormick Manufacturing Company Building — Dayton, Montgomery County, Ohio
→1979McCracken-McFarland House — Cambridge, Guernsey County, Ohio
→1978McCracken-Scott House — Cambridge, Guernsey County, Ohio
→1984McCracken-Sells House — Columbus, Franklin County, Ohio
→1988McCrea, Matthew, House — Circleville, Pickaway County, Ohio
→1982McCreary-Burnworth House — Cambridge, Guernsey County, Ohio
→1986McCrory Building — Youngstown, Mahoning County, Ohio
→1982McCully Log House — New Concord, Muskingum County, Ohio
→1982McCune's Villa — Granville, Licking County, Ohio
→1978McDannald Homestead — Columbus, Franklin County, Ohio
→1996McDonald Farm — Xenia, Greene County, Ohio
→1979McDowell, Austin, House — Dublin, Franklin County, Ohio
→2001McFarland, Duncan, House — Bentleyville, Cuyahoga County, Ohio
→1990McFarland, James, House — Mount Vernon, Knox County, Ohio
→1975McGraw House — Bucyrus, Crawford County, Ohio
→1966McGuffey, William H., Boyhood Home Site ★ NHL — Coitsville Township, Mahoning County, Ohio
→1966McGuffey, William H., House ★ NHL — Oxford, Butler County, Ohio
→1979McIntire Terrace Historic District — Zanesville, Muskingum County, Ohio
→1978McKay, Moses, House — Waynesville, Warren County, Ohio
→1995McKee--Pumphrey House — Martinsburg, Knox County, Ohio
→1986McKelvey--Higbee Co. Buildings — Youngstown, Mahoning County, Ohio
→1982McKenster-Groff House — Sandusky, Erie County, Ohio
→1982McKever, Lewis, Farmhouse — Williamsburg, Clermont County, Ohio
→1975McKinley Memorial — Niles, Trumbull County, Ohio
→1979McKinley School — Cincinnati, Hamilton County, Ohio
→2005McKinley School — West Milton, Miami County, Ohio
→1985McKinley Terrace — Cleveland, Cuyahoga County, Ohio
→1970McKinley, William, Tomb ★ NHL — Canton, Stark County, Ohio
→1974McKisson, Robert, House — Sagamore Hills, Summit County, Ohio
→1979McKitrick, Dr., House — Dublin, Franklin County, Ohio
→1979McKitrick, Dr., Office — Dublin, Franklin County, Ohio
→1978McLain-Gillmer House — Warren, Trumbull County, Ohio
→1986McMillan, Reuben, Free Library — Youngstown, Mahoning County, Ohio
→1982McNamar-McLure-Miller Residence — Newark, Licking County, Ohio
→1988McPherson Town Historic District — Dayton, Montgomery County, Ohio
→1974McPherson, Maj. Gen. James B., House — Clyde, Sandusky County, Ohio
→1974McSweeney, John, House — Wooster, Wayne County, Ohio
→2005McWilliams, Matthew, House — Cincinnati, Hamilton County, Ohio
→1983Mead House — Pataskala, Licking County, Ohio
→1978Mead-Zimmerman House — Greenwich, Huron County, Ohio
→1983Mechanics Building and Loan Company — Mansfield, Richland County, Ohio
→1985Mechanicsburg Baptist Church — Mechanicsburg, Champaign County, Ohio
→1985Mechanicsburg Commercial Historic District — Mechanicsburg, Champaign County, Ohio
→1976Mecklenburg's Garden — Cincinnati, Hamilton County, Ohio
→2008Medfair Heights Apartment Historic District — Medina, Medina County, Ohio
→1984Medical Centre Building — Cleveland, Cuyahoga County, Ohio
→1978Medill, William, House — Lancaster, Fairfield County, Ohio
→1970Medina County Courthouse — Medina, Medina County, Ohio
→2018Medina Farmers Exchange Co. — Medina, Medina County, Ohio
→2002Medina Masonic Temple and Medina Theater — Medina, Medina County, Ohio
→1975Medina Public Square Historic District — Medina, Medina County, Ohio
→1985Meek, J.F., Buildings — Coshocton, Coshocton County, Ohio
→1991Meeker, Forrest, House and Farm — Delaware, Delaware County, Ohio
→1982Meigs County Fairgrounds, Grandstand and Racetrack — Rock Springs, Meigs County, Ohio
→1984Melbourne Flats — Cincinnati, Hamilton County, Ohio
→1983Mellett-Canton Daily News Building — Canton, Stark County, Ohio
→1979Melville-Milne, William Gordon, House — Sandusky, Erie County, Ohio
→1988Memorial Hall — Dayton, Montgomery County, Ohio
→1980Memorial Hall — Circleville, Pickaway County, Ohio
→1978Mendon Town Hall — Mendon, Mercer County, Ohio
→1978Mentor Avenue District — Painesville, Lake County, Ohio
→2014Mentor Village Hall — Mentor, Lake County, Ohio
→2005Mentor Village School — Mentor, Lake County, Ohio
→1981Mercer Log House — Fairborn, Greene County, Ohio
→1983Merriman, Wells E., House — Akron, Summit County, Ohio
→1988Merryman, Dr. James, House — Hilliard, Franklin County, Ohio
→1992Mertz, John, House — Sandusky, Erie County, Ohio
→1973Merwin, George, House — Cleveland, Cuyahoga County, Ohio
→1974Mesopotamia Village District — Mesopotamia, Trumbull County, Ohio
→1980Metcalf, Rev. Harlan, House — Madison, Lake County, Ohio
→1989Methodist Church Parsonage — Canal Winchester, Franklin County, Ohio
→1979Methodist Church, Old — Fredericktown, Knox County, Ohio
→1978Methodist Episcopal Church — Crestline, Crawford County, Ohio
→1998Methodist Episcopal Church of Painesville, The — Painesville, Lake County, Ohio
→1979Methodist Parsonage, Old — Wellington, Lorain County, Ohio
→1979Metropolitan Block — Lima, Allen County, Ohio
→1988Meyer House — Portsmouth, Scioto County, Ohio
→1979Meyers, Capt., House — Vermilion, Erie County, Ohio
→1966Miami And Erie Canal, Deep Cut ★ NHL — Spencerville, Allen County, Ohio
→1975Miami County Courthouse and Power Station — Troy, Miami County, Ohio
→1998Miami Monthly Meeting Historic District — Waynesville, Warren County, Ohio
→1979Miami Street Grade School — Tiffin, Seneca County, Ohio
→1982Miami-Erie Canal Lock No. 70 — Huber Heights, Montgomery County, Ohio
→1978Miami-Erie Canal Site Historic District — West Chester, Butler County, Ohio
→1970Miamisburg Mound — Miamisburg, Montgomery County, Ohio
→1979Michaels Farm — Kansas, Seneca County, Ohio
→1985Middle Bass Club Historic District — Middle Bass Island, Ottawa County, Ohio
→1994Middle Sandy Presbyterian Church — Homeworth, Columbiana County, Ohio
→1986Middleport Public Library — Middleport, Meigs County, Ohio
→1975Milan Historic District — Milan, Erie County, Ohio
→1974Miles Park Historic District — Cleveland, Cuyahoga County, Ohio
→1979Miles, Enos, House — Chesterville, Morrow County, Ohio
→2005Mill Creek Park Historic District — Youngstown, Mahoning County, Ohio
→1976Mill Creek Park Suspension Bridge — Youngstown, Mahoning County, Ohio
→1976Mill Hollow House, The — Vermilion, Lorain County, Ohio
→1984Mill Office and Post Office — Woodsdale, Butler County, Ohio
→1979Mill Road Bowstring Bridge — Bladensburg, Knox County, Ohio
→1991Mill Worker House No. 1 — Delaware, Delaware County, Ohio
→1991Mill Worker House No. 3 — Delaware, Delaware County, Ohio
→1991Mill Worker House No. 4 — Delaware, Delaware County, Ohio
→1991Mill Worker House No. 5 — Delaware, Delaware County, Ohio
→1976Millen-Schmidt House — Xenia, Greene County, Ohio
→1984Miller Block — Cleveland, Cuyahoga County, Ohio
→1978Miller Farm — Baltimore, Fairfield County, Ohio
→2002Miller--Bissell Farmstead — New London, Huron County, Ohio
→2003Miller--Knight House — Miller, Lawrence County, Ohio
→1974Miller-Leuser Log House — Cincinnati, Hamilton County, Ohio
→1980Miller, Charles A., House — Cincinnati, Hamilton County, Ohio
→1975Miller, Daniel, House — Dayton, Montgomery County, Ohio
→1980Miller, Daniel, House — West Lafayette, Coshocton County, Ohio
→1985Miller, Frederick A., House-Broad Gables — Columbus, Franklin County, Ohio
→1979Miller, Harvey, Residence — Ghent, Summit County, Ohio
→1984Miller, J.F., House — Marble Cliff, Franklin County, Ohio
→1994Miller, John, House — Greentown, Stark County, Ohio
→1976Miller, Lewis, House — Akron, Summit County, Ohio
→1978Miller, Peter, House — Avon Lake, Lorain County, Ohio
→2000Miller, Thomas, House — Elizabethtown, Hamilton County, Ohio
→1984Millersburg Historic District — Millersburg, Holmes County, Ohio
→1980Milligan, Cuthbert, House — Coshocton, Coshocton County, Ohio
→1977Mills' Row — Cincinnati, Hamilton County, Ohio
→1979Minch, Capt., House — Vermilion, Erie County, Ohio
→1977Miner's Supply Store — Coalton, Jackson County, Ohio
→1979Minster Elementary School — Minster, Auglaize County, Ohio
→1983MISSISSIPPI III — Marietta, Washington County, Ohio
→1975Mitchell Historic District — Milan, Erie County, Ohio
→1979Mitchell, Charles, House — Washington Township, Franklin County, Ohio
→1978Mitchell, Randolph, House — New Reading, Perry County, Ohio
→1980Mitchell, Richard H., House — Cincinnati, Hamilton County, Ohio
→1976Mo-John, Betsy, Cabin — Port Clinton, Ottawa County, Ohio
→2015Mohawk Place Historic District — Cincinnati, Hamilton County, Ohio
→1984Mohrman-Jack-Evans House — Lebanon, Warren County, Ohio
→1974Monitor House — Saint Paris, Champaign County, Ohio
→1986Monnett Memorial M. E. Chapel — Bucyrus, Crawford County, Ohio
→1980Monroe Bank — Woodsfield, Monroe County, Ohio
→1980Monroe County Courthouse — Woodsfield, Monroe County, Ohio
→1982Monroe School — Sandusky, Erie County, Ohio
→1976Monroe Street Commercial Buildings — Toledo, Lucas County, Ohio
→1981Monroe Township Hall-Opera House — Johnstown, Licking County, Ohio
→1984Montana Apartments — Cleveland, Cuyahoga County, Ohio
→1974Monteith Hall — Elyria, Lorain County, Ohio
→1970Montgomery County Courthouse — Dayton, Montgomery County, Ohio
→1987Montgomery Saltbox Houses — Montgomery, Hamilton County, Ohio
→1982Mooney, William C., House — Woodsfield, Monroe County, Ohio
→1986Moore, Charles H., House — Wyoming, Hamilton County, Ohio
→1988Moore, Edward W. and Louise C., Estate — Mentor, Lake County, Ohio
→1993Moore, Leonard M., House — Lorain, Lorain County, Ohio
→1975Moore, Philip, Stone House — West Portsmouth, Scioto County, Ohio
→1973Moormann, Bernard H., House — Cincinnati, Hamilton County, Ohio
→1975Morehouse-Downes House — Waterville, Lucas County, Ohio
→2011Moreland Theater Building — Cleveland, Cuyahoga County, Ohio
→1979Morgan Mansion — Wellston, Jackson County, Ohio
→2016Morgan Township House — Okeana, Butler County, Ohio
→1990Morgan--Hueston House — Fairfield, Butler County, Ohio
→1982Morgan, Garrett, House — Cleveland, Cuyahoga County, Ohio
→1973Morgan, John H., Surrender Site — West Point, Columbiana County, Ohio
→1978Morley, Lewis, House — Painesville, Lake County, Ohio
→1979Morris House — Circleville, Pickaway County, Ohio
→1986Morris, C. E., House — Columbus, Franklin County, Ohio
→1973Morrison House — Cincinnati, Hamilton County, Ohio
→1980Morristown Historic District — Morristown, Belmont County, Ohio
→1974Morrow County Courthouse And Jail — Mount Gilead, Morrow County, Ohio
→1984Morrow-Overman-Fairley House — Hillsboro, Highland County, Ohio
→1982Mosgrove, Dr. Adam, House — Urbana, Champaign County, Ohio
→1979Mosher House — Wellington, Lorain County, Ohio
→1982Moss-Foster House — Sandusky, Erie County, Ohio
→1978Most Pure Heart Of Mary Church — Shelby, Richland County, Ohio
→1995Mother of Sorrows Church — Ashtabula, Ashtabula County, Ohio
→1982Mother Thompson House — Hillsboro, Highland County, Ohio
→1996Mott Drug Store — Garrattsville, Portage County, Ohio
→1973Mound Cemetery Mound — Marietta, Washington County, Ohio
→1974Mound Cemetery Mound — Chester, Meigs County, Ohio
→1966Mound City Group National Monument — Chillicothe, Ross County, Ohio
→1979Mound House — Duncan Falls, Muskingum County, Ohio
→1980Mount Adams Public School — Cincinnati, Hamilton County, Ohio
→2010Mount Airy Forest — Cincinnati, Hamilton County, Ohio
→1973Mount Auburn Historic District — Cincinnati, Hamilton County, Ohio
→1974Mount Liberty Tavern — Mount Liberty, Knox County, Ohio
→1975Mount Orab Station — Mount Orab, Brown County, Ohio
→1974Mount Oval — Circleville, Pickaway County, Ohio
→1974Mount Pleasant Historic District ★ NHL — Mt. Pleasant, Jefferson County, Ohio
→1974Mount Sterling Historic District — Mount Sterling, Madison County, Ohio
→1972Mount Union College District — Alliance, Stark County, Ohio
→2001Mount Victory Historic District — Mount Victory, Hardin County, Ohio
→1980Mount Zion Baptist Church — Athens, Athens County, Ohio
→1978Mount Zion Presbyterian Church — Chandlersville, Muskingum County, Ohio
→1978Mountain House — Chillicothe, Ross County, Ohio
→1985Mt. Healthy Public School — Mt. Healthy, Hamilton County, Ohio
→1976Mt. Olive Road Covered Bridge — Allensville, Vinton County, Ohio
→1995Mt. Tabor Church Building, Cemetery and Hitching Lot — West Liberty, Champaign County, Ohio
→1980Mueller Brewery — Tiffin, Seneca County, Ohio
→2016Mueller Electric Company Building — Cleveland, Cuyahoga County, Ohio
→1980Mueller, Christ, House — Tiffin, Seneca County, Ohio
→1974Mull Covered Bridge — Burgoon, Sandusky County, Ohio
→1982Muller, Daniel C., Carousel — Sandusky, Erie County, Ohio
→1980Mumma, Jacob H. W., House — Dayton, Montgomery County, Ohio
→1973Municipal Building — Springfield, Clark County, Ohio
→2015Municipal Light Plant — Columbus, Franklin County, Ohio
→1980Munson, Judge Albert, House — Medina, Medina County, Ohio
→1982Murphy, Daniel, Log House — St. Martin, Brown County, Ohio
→1988Murray Hill School — Cleveland, Cuyahoga County, Ohio
→1982Murschel House — Sandusky, Erie County, Ohio
→1979Muskingum College Campus Historic District — New Concord, Muskingum County, Ohio
→1973Muskingum County Courthouse And Jail — Zanesville, Muskingum County, Ohio
→1978Muskingum River Lock No. 10 And Canal — Zanesville, Muskingum County, Ohio
→2007Muskingum River Navigation Historic District — Coshocton, Coshocton County, Ohio
→1978Musser, Henry, House — Baltimore, Fairfield County, Ohio
→1982Mutual Home & Savings Association Building — Dayton, Montgomery County, Ohio
→1979Myer House — Sandy Corners, Franklin County, Ohio
→1997Myers Block--Home Company Building — Ashland, Ashland County, Ohio
→2018Myers Daily Market — Springfield, Clark County, Ohio
→1975Myers Hall — Springfield, Clark County, Ohio
→1999Nafzger--Miller House — Gahanna, Franklin County, Ohio
→2022Nathaniel Hawthorne Elementary School — Cleveland, Cuyahoga County, Ohio
→2003National Home, Daughters of America — Tiffin, Seneca County, Ohio
→1990National Orphans' Home, Junior Order United American Mechanics — Tiffin, Seneca County, Ohio
→1985National Road — Cambridge, Guernsey County, Ohio
→2003National Town and Country Club — Cleveland, Cuyahoga County, Ohio
→1982Neal Clothing — Lima, Allen County, Ohio
→2012Neal Terrace — Cleveland, Cuyahoga County, Ohio
→1980Near Northside Historic District — Columbus, Franklin County, Ohio
→1976Neely-Sieber House — Lima, Allen County, Ohio
→1984Neff Apartments — Cleveland, Cuyahoga County, Ohio
→1974Neff, Conrad, House — Canfield, Mahoning County, Ohio
→1988Neff, Edward E., House — Delaware, Delaware County, Ohio
→1975Nela Park — East Cleveland, Cuyahoga County, Ohio
→1993Nelson, Luman, House — Ravenna, Portage County, Ohio
→1996Nelsonville Historic District — Nelsonville, Athens County, Ohio
→1971Neukom, Albert, House — Toledo, Lucas County, Ohio
→1975New Baltimore Inn — New Baltimore, Stark County, Ohio
→2000New England Building — Cleveland, Cuyahoga County, Ohio
→1973New England Lodge — Worthington, Franklin County, Ohio
→2009New Hayden Building — Columbus, Franklin County, Ohio
→1985New Indianola Historic District — Columbus, Franklin County, Ohio
→1976New Lyme Institute — South New Lyme, Ashtabula County, Ohio
→1975New Lyme Town Hall — South New Lyme, Ashtabula County, Ohio
→2004New Market Township Community House — Hillsboro, Highland County, Ohio
→1993New Richmond Water Works and Electric Station — New Richmond, Clermont County, Ohio
→2001New Straitsville School — New Straitsville, Perry County, Ohio
→1982New York Central Freight House — Elyria, Lorain County, Ohio
→2002Newark Downtown Historic District — Newark, Licking County, Ohio
→1966Newark Earthworks ★ NHL — Newark, Licking County, Ohio
→2015Newark High School — Newark, Licking County, Ohio
→2012Newberry Township School — Bradford, Miami County, Ohio
→1980Newcom House — Dayton, Montgomery County, Ohio
→1987Newman, William, House — Portsmouth, Scioto County, Ohio
→2001Newport and Cincinnati Bridge — Cincinnati, Hamilton County, Ohio
→2006Newport Village Allotment Historic District — Boardman, Mahoning County, Ohio
→1988Newton Avenue Historic District — Cleveland, Cuyahoga County, Ohio
→1974Newton Falls Covered Bridge — Newton Falls, Trumbull County, Ohio
→2018Newton Falls United Service Organization (USO) Center — Newton Falls, Trumbull County, Ohio
→1974Newton, Judge Eben, House — Canfield, Mahoning County, Ohio
→1988Nichols, John H., House — Wapakoneta, Auglaize County, Ohio
→1979Nichols, Walter, House — Elyria, Lorain County, Ohio
→1979Nicholson, James, House — Lakewood, Cuyahoga County, Ohio
→1979Nickel, Old, Plate Railroad Depot — Vermilion, Erie County, Ohio
→1987Niles Car & Manufacturing Company Electric Railway Interurban Combine No. 21 — Worthington, Franklin County, Ohio
→2006Niles Masonic Temple — Niles, Trumbull County, Ohio
→1979Nimocks House — Wellington, Lorain County, Ohio
→1985Ninchelser, Dr., House — Mechanicsburg, Champaign County, Ohio
→1980Ninth Street Historic District — Cincinnati, Hamilton County, Ohio
→1982No. 5 Fire Station — Sandusky, Erie County, Ohio
→2004Noble County Jail and Sheriff's Office — Caldwell, Noble County, Ohio
→1975Noble, Jonathan, House — Columbus, Franklin County, Ohio
→1980Noble, Lewis, House — Worthington, Franklin County, Ohio
→1979Nooney, William , House — Wellington, Lorain County, Ohio
→1980Norfolk and Western Freight Station — Madison, Lake County, Ohio
→1978Norfolk And Western Railroad Depot — Ironton, Lawrence County, Ohio
→1983Normandy Farms — Centerville, Montgomery County, Ohio
→1981North Baltimore Town Hall — North Baltimore, Wood County, Ohio
→1984North Broadway Historic District — Lebanon, Warren County, Ohio
→2010North Columbus Commercial Historic District — Columbus, Franklin County, Ohio
→1991North End Neighborhood Historic District — Steubenville, Jefferson County, Ohio
→1987North High School — Columbus, Franklin County, Ohio
→1989North High Street Historic District — Canal Winchester, Franklin County, Ohio
→1987North Hill Historic District — Mingo Junction, Jefferson County, Ohio
→1990North Main--North Gay Streets Historic District — Mount Vernon, Knox County, Ohio
→1985North Main-North Detroit Street Historic District — Kenton, Hardin County, Ohio
→1982North Market Historic District — Columbus, Franklin County, Ohio
→1980North Olmsted Town Hall — North Olmsted, Cuyahoga County, Ohio
→1974North Presbyterian Church — Cleveland, Cuyahoga County, Ohio
→1974North Ridgeville City Hall — North Ridgeville, Lorain County, Ohio
→1980North Sandusky Street Historic District — Tiffin, Seneca County, Ohio
→1980Northeast Tiffin Historic District — Tiffin, Seneca County, Ohio
→2014Northern Ohio Blanket Mills — Cleveland, Cuyahoga County, Ohio
→2000Northfield Town Hall — Northfield, Summit County, Ohio
→1975Northrop, Julia Carter, House — Olmsted Falls, Cuyahoga County, Ohio
→1980Northside United Methodist Church — Cincinnati, Hamilton County, Ohio
→2007Norwalk Memorial Hospital — Norwalk, Huron County, Ohio
→1979Norwell Residence — Cincinnati, Hamilton County, Ohio
→1980Norwood Municipal Building — Norwood, Hamilton County, Ohio
→1988Notre Dame Academy — Cleveland, Cuyahoga County, Ohio
→2001Notre Dame Academy and Notre Dame High School — Hamilton, Butler County, Ohio
→1983Notre Dame College of Ohio — South Euclid, Cuyahoga County, Ohio
→2009Nurre-Royston House — Cincinnati, Hamilton County, Ohio
→1976Nutwood Place — Urbana, Champaign County, Ohio
→1990O'Neil's Department Store — Akron, Summit County, Ohio
→1990O'Shaughnessy Dam and Bridge — Shawnee Hills, Delaware County, Ohio
→1973Oak Hill — Chillicothe, Ross County, Ohio
→1969Oak Hill Cottage — Mansfield, Richland County, Ohio
→1978Oak Hill Welsh Congregational Church — Oak Hill, Jackson County, Ohio
→1983Oakland Cemetery Chapel and Superintendent's House and Office — Sandusky, Erie County, Ohio
→1980Oakwood — Newark, Licking County, Ohio
→1999Oakwood Cemetery Chapel — Cuyahoga Falls, Summit County, Ohio
→1966Oberlin College ★ NHL — Oberlin, Lorain County, Ohio
→1998Oberlin Gas Lighting Company Gasholder House — Oberlin, Lorain County, Ohio
→1979Oberlin Lake Shore And Michigan Southern Station — Oberlin, Lorain County, Ohio
→1978Observatory Historic District — Cincinnati, Hamilton County, Ohio
→1979Octagon, The — Tiffin, Seneca County, Ohio
→1987Odd Fellows Hall — Portsmouth, Scioto County, Ohio
→1988Odd Fellows Hall — Hilliard, Franklin County, Ohio
→1985Odd Fellows Temple — East Liverpool, Columbiana County, Ohio
→1980Odd Fellows' Home for Orphans, Indigent and Aged — Springfield, Clark County, Ohio
→2005Oesterlein Machine Company--Fashion Frocks, Inc. Complex — Cincinnati, Hamilton County, Ohio
→1966Ohio and Erie Canal ★ NHL — Valley View, Cuyahoga County, Ohio
→1974Ohio and Erie Canal Deep Lock — Peninsula, Summit County, Ohio
→1973Ohio Asylum for the Blind — Columbus, Franklin County, Ohio
→2020Ohio Baptist General Association Headquarters — Columbus, Franklin County, Ohio
→1984Ohio Bell Henderson-Endicott Exchange Building — Cleveland, Cuyahoga County, Ohio
→1973Ohio Canal Groundbreaking Site — Heath, Licking County, Ohio
→1974Ohio City Preservation District — Cleveland, Cuyahoga County, Ohio
→1989Ohio City Preservation District (Boundary Increase) — Cleveland, Cuyahoga County, Ohio
→1970Ohio Company Land Office — Marietta, Washington County, Ohio
→1987Ohio Farm Bureau Federation Offices — Columbus, Franklin County, Ohio
→2014Ohio Finance Building — Columbus, Franklin County, Ohio
→1978Ohio Hospital For Epileptics Stone Water Towers — Gallipolis, Gallia County, Ohio
→1984Ohio Institution for the Education of the Deaf and Dumb — Columbus, Franklin County, Ohio
→1980Ohio Lantern Company — Tiffin, Seneca County, Ohio
→1999Ohio Moline Plow Company Building — Columbus, Franklin County, Ohio
→1980Ohio National Bank — Columbus, Franklin County, Ohio
→1980Ohio National Guard Armory — Cincinnati, Hamilton County, Ohio
→1986Ohio One--Ohio Edison — Youngstown, Mahoning County, Ohio
→1980Ohio Power Company — Zanesville, Muskingum County, Ohio
→1976Ohio Soldiers' And Sailors' Home — Sandusky, Erie County, Ohio
→1974Ohio Stadium — Columbus, Franklin County, Ohio
→1974Ohio State Arsenal — Columbus, Franklin County, Ohio
→1975Ohio State Normal College At Kent — Kent, Portage County, Ohio
→1990Ohio State Office Building — Columbus, Franklin County, Ohio
→1983Ohio State Reformatory — Mansfield, Richland County, Ohio
→1994Ohio State Route 51 Bridge Over the Portage River — Elmore, Ottawa County, Ohio
→1972Ohio Statehouse ★ NHL — Columbus, Franklin County, Ohio
→1982Ohio Theatre — Lima, Allen County, Ohio
→1983Ohio Theatre — Mansfield, Richland County, Ohio
→1973Ohio Theatre ★ NHL — Columbus, Franklin County, Ohio
→2006Ohio Theatre — Toledo, Lucas County, Ohio
→1979Ohio University Campus Green Historic District — Athens, Athens County, Ohio
→1979Ohio Valley Clay Company — Steubenville, Jefferson County, Ohio
→1985Ohio Wesleyan University Student Observatory — Delaware, Delaware County, Ohio
→1974Ohmer, Nicholas, House — Dayton, Montgomery County, Ohio
→1972Old Akron Post Office — Akron, Summit County, Ohio
→1978Old Amherst Freight Depot — Amherst, Lorain County, Ohio
→1979Old Bartlett and Goble Store — Chesterville, Morrow County, Ohio
→1987Old Beechwold Historic District — Columbus, Franklin County, Ohio
→1983Old Carriage Barn — Mansfield, Richland County, Ohio
→1973Old Center School — Mayfield Village, Cuyahoga County, Ohio
→1972Old Central Post Office — Toledo, Lucas County, Ohio
→1979Old City Hall — Elyria, Lorain County, Ohio
→1976Old College Hill Post Office — Cincinnati, Hamilton County, Ohio
→1973Old District 10 Schoolhouse — Middleburg Heights, Cuyahoga County, Ohio
→2016Old District Nine Schoolhouse — Elyria, Lorain County, Ohio
→1979Old Elyria Water Tower — Elyria, Lorain County, Ohio
→2009Old Enon Road Stone Arch Culvert — Enon, Clark County, Ohio
→1980Old Euclid District 4 Schoolhouse — Lyndhurst, Cuyahoga County, Ohio
→1974Old Federal Building and Post Office — Cleveland, Cuyahoga County, Ohio
→1982Old First Church — Sandusky, Erie County, Ohio
→1979Old Funeral Palor — Vermilion, Erie County, Ohio
→1976Old Gothic Barns — Cincinnati, Hamilton County, Ohio
→1972Old Governor's Mansion — Columbus, Franklin County, Ohio
→1979Old Harbour Store — Vermilion, Erie County, Ohio
→1988Old Hotel, The — Spring Valley, Greene County, Ohio
→1979Old Interurban Station — Vermilion, Erie County, Ohio
→1979Old Jib's Corner — Vermilion, Erie County, Ohio
→1978Old Lawrence County Jail — Burlington, Lawrence County, Ohio
→1976Old Log Post Office — Franklin, Warren County, Ohio
→1974Old Mahoning County Courthouse — Canfield, Mahoning County, Ohio
→1982Old McKinley High School — Canton, Stark County, Ohio
→1975Old Meigs County Courthouse And Chester Academy — Chester, Meigs County, Ohio
→1979Old Mill — Vermilion, Erie County, Ohio
→1996Old North End Historic District — Columbus, Franklin County, Ohio
→1999Old North End Historic District (Boundary Increase) — Columbus, Franklin County, Ohio
→1979Old Ohio Union — Columbus, Franklin County, Ohio
→1987Old Peace Lutheran Church — Gahanna, Franklin County, Ohio
→1979Old Port Columbus Airport Control Tower — Columbus, Franklin County, Ohio
→1975Old Post Office And Federal Building — Dayton, Montgomery County, Ohio
→1979Old Railroad Station — Elyria, Lorain County, Ohio
→2006Old River Road Historic District — Cleveland, Cuyahoga County, Ohio
→1975Old School Privy — Genoa, Ottawa County, Ohio
→1973Old South Church — Kirtland, Lake County, Ohio
→2016Old St. John's Church — Elyria, Lorain County, Ohio
→1976Old St. Mary's Church, School and Rectory — Cincinnati, Hamilton County, Ohio
→1979Old St. Patrick's Church — Wellington, Lorain County, Ohio
→1973Old Stone Church — Cleveland, Cuyahoga County, Ohio
→1983Old Tippecanoe Main Street Historic District — Tipp City, Miami County, Ohio
→1984Old Union School — Coshocton, Coshocton County, Ohio
→1979Old Union School — Chesterville, Morrow County, Ohio
→1990Old US Post Office — Marion, Marion County, Ohio
→1979Old Vermilion Banking Company Building — Vermilion, Erie County, Ohio
→1979Old Vermilion Mill — Vermilion, Erie County, Ohio
→1975Old Washington Historic District — Old Washington, Guernsey County, Ohio
→1982Old Wayne County Jail — Wooster, Wayne County, Ohio
→1973Old West End District — Toledo, Lucas County, Ohio
→1984Old West End Historic District (Boundary Increase/Decrease) — Toledo, Lucas County, Ohio
→1969Old Wood County Jail — Perrysburg, Wood County, Ohio
→1995Olin, Arvin, House — Kent, Portage County, Ohio
→2009Olive Branch High School — New Carlisle, Clark County, Ohio
→2007Olive Furnace — Pedro, Lawrence County, Ohio
→1981Oliver, John G., House — Mentor, Lake County, Ohio
→1997Ollie's Tavern — New Carlisle, Clark County, Ohio
→2000Olmsted Falls Depot — Olmsted Falls, Cuyahoga County, Ohio
→2000Olmsted Falls Historic District — Olmsted Falls, Cuyahoga County, Ohio
→1988Olney, Charles, House and Gallery — Cleveland, Cuyahoga County, Ohio
→1987Omar Chapel — Attica, Seneca County, Ohio
→1982Onesto Hotel — Canton, Stark County, Ohio
→2018Ontario Building — Toledo, Lucas County, Ohio
→2019Open Air School — Columbus, Franklin County, Ohio
→2012Oppmann Terrace — Cleveland, Cuyahoga County, Ohio
→1975Oregon Historic District — Dayton, Montgomery County, Ohio
→1983Orton Memorial Laboratory — Columbus, Franklin County, Ohio
→1977Osborn, Charles S., House — Westerville, Franklin County, Ohio
→1982Osborne School — Sandusky, Erie County, Ohio
→1980Otis Hospital — Celina, Mercer County, Ohio
→1974Ottawa County Courthouse — Port Clinton, Ottawa County, Ohio
→1976Ottawa Waterworks Building — Ottawa, Putnam County, Ohio
→1979Otterbein Mausoleum — Westerville, Franklin County, Ohio
→1974Otway Covered Bridge — Otway, Scioto County, Ohio
→1970Our House — Gallipolis, Gallia County, Ohio
→1980Our Lady of Mercy High School — Cincinnati, Hamilton County, Ohio
→1979Our Lady of Mount Carmel Church — Youngstown, Mahoning County, Ohio
→1994Ourant's School — Cadiz, Harrison County, Ohio
→1995Outville Depot — Pataskala, Licking County, Ohio
→2018Outville Hay and Grain Company Building — Outville, Licking County, Ohio
→1983Over-the-Rhine Historic District — Cincinnati, Hamilton County, Ohio
→2014Over-the-Rhine Historic District (Boundary Increase) — Cincinnati, Hamilton County, Ohio
→1976Overfield Tavern — Troy, Miami County, Ohio
→1983Overholt House — Wooster, Wayne County, Ohio
→1974Overlook Road Carriage House District — Cleveland Heights, Cuyahoga County, Ohio
→1983Overmyer-Waggoner-Roush Farm — Lindsey, Sandusky County, Ohio
→2021Oviatt, Orson Minot, House — Richfield, Summit County, Ohio
→1976Oxford Female Institute — Oxford, Butler County, Ohio
→1980Oxford Railroad Depot and Junction House — Oxford, Butler County, Ohio
→2000Ozmun, Isaac and Maria, Farmstead — Boston Heights, Summit County, Ohio
→1986Pabodie, Professor William, House — Wyoming, Hamilton County, Ohio
→1983Pacific Curios Antiques — Mansfield, Richland County, Ohio
→1979Packard-Doubler House — Independence, Cuyahoga County, Ohio
→1985Packard, James Ward, House — Warren, Trumbull County, Ohio
→1975Paige, David R., House — Madison, Lake County, Ohio
→1972Painesville City Hall — Painesville, Lake County, Ohio
→1980Palace Hotel — Cincinnati, Hamilton County, Ohio
→1979Palace Theater — Canton, Stark County, Ohio
→1976Palace Theater — Marion, Marion County, Ohio
→1980Palace Theatre — Cincinnati, Hamilton County, Ohio
→1978Palace Theatre Building — Lorain, Lorain County, Ohio
→1974Palmer House — Northfield Center, Summit County, Ohio
→1976Palmyra Center Hotel — Palmyra, Portage County, Ohio
→1977Palos Covered Bridge — Glouster, Athens County, Ohio
→1986Panek Block — Cleveland, Cuyahoga County, Ohio
→1973Pansy Methodist Church and School Historic District — Clarksville, Clinton County, Ohio
→1983Park Avenue Baptist Church — Mansfield, Richland County, Ohio
→1996Park Building — Cleveland, Cuyahoga County, Ohio
→1983Park Flats — Cincinnati, Hamilton County, Ohio
→1980Park, Jonathan, House — Worthington, Franklin County, Ohio
→1975Parker Covered Bridge — Upper Sandusky, Wyandot County, Ohio
→1980Parker, John P., House — Ripley, Brown County, Ohio
→1997Parker, John P., House ★ NHL — Ripley, Brown County, Ohio
→1974Parks Covered Bridge — Chalfunts, Perry County, Ohio
→2008Parkside Apartments — Cincinnati, Hamilton County, Ohio
→1979Parmelee House — Valley City, Medina County, Ohio
→1983Pataskala Banking Company — Pataskala, Licking County, Ohio
→1983Pataskala Elementary School — Pataskala, Licking County, Ohio
→1983Pataskala Jail — Pataskala, Licking County, Ohio
→1983Pataskala Presbyterian Church — Pataskala, Licking County, Ohio
→1983Pataskala Town Hall — Pataskala, Licking County, Ohio
→1983Pataskala United Methodist Church — Pataskala, Licking County, Ohio
→1985Patterson, Mary A., Memorial — East Liverpool, Columbiana County, Ohio
→1976Patterson, Samuel N., House — Xenia, Greene County, Ohio
→1973Paul Hall, Muskingum College — New Concord, Muskingum County, Ohio
→1983Paulding County Carnegie Library — Paulding, Paulding County, Ohio
→1974Paulding County Courthouse — Paulding, Paulding County, Ohio
→1979Peairs Homestead — Zanesville, Muskingum County, Ohio
→1980Pease Homestead — Centerville, Montgomery County, Ohio
→1980Pease, George, House — Madison, Lake County, Ohio
→2011Pebblebrook Farm House and Gardens — Chesterland, Geauga County, Ohio
→1979Peck, Judge William V., House — Portsmouth, Scioto County, Ohio
→1976Peck, L. W., House — Eagleville, Ashtabula County, Ohio
→1985Peeble's Corner Historic District — Cincinnati, Hamilton County, Ohio
→1975Peerless Motor Company Plant No. 1 — Cleveland, Cuyahoga County, Ohio
→1986Peggy Ann Building — Youngstown, Mahoning County, Ohio
→1979Pelton House — Vermilion, Erie County, Ohio
→1979Pelton, Old, Hotel — Vermilion, Erie County, Ohio
→1966Pendleton, George Hunt, House ★ NHL — Cincinnati, Hamilton County, Ohio
→1997Penfield, Louis A., House — Willoughby Hills, Lake County, Ohio
→1974Peninsula Village Historic District — Peninsula, Summit County, Ohio
→1972Pennsylvania Depot — Mount Vernon, Knox County, Ohio
→1973Pennsylvania House — Springfield, Clark County, Ohio
→1976Pennsylvania Railroad Depot And Baggage Room ★ NHL — Dennison, Tuscarawas County, Ohio
→1997Pennsylvania Railway Ore Dock — Cleveland, Cuyahoga County, Ohio
→1979Pennsylvania Railway Station — Newark, Licking County, Ohio
→1972People's Federal Savings and Loan Association ★ NHL — Sidney, Shelby County, Ohio
→1989Peoples Bank Company Building — Canal Winchester, Franklin County, Ohio
→1974Perkins, Col. Simon, Mansion — Akron, Summit County, Ohio
→1985Perrill-Goodman Farm House — Groveport, Pickaway County, Ohio
→1981Perry County Courthouse and Jail — New Lexington, Perry County, Ohio
→1973Perry-Payne Building — Cleveland, Cuyahoga County, Ohio
→1991Perry, Norman Dewey, House — Delaware, Delaware County, Ohio
→1966Perry's Victory and International Peace Memorial — Put-in-Bay, Ottawa County, Ohio
→1975Perrysburg Historic District — Perrysburg, Wood County, Ohio
→1990Perrysburg Historic District (Boundary Increase) — Perrysburg, Wood County, Ohio
→1990Perrysburg Water Maintenance Building — Perrysburg, Wood County, Ohio
→1992Pershing, Christian, Barn — Dover, Tuscarawas County, Ohio
→1985Peters Cartridge Company — Kings Mills, Warren County, Ohio
→1984Peters-Kupferschmid House — Cincinnati, Hamilton County, Ohio
→1984Peters, Stevenson, House — Circleville, Pickaway County, Ohio
→1970Petersburg Mill — Carrollton, Carroll County, Ohio
→1977Pfarr Log House — Milford, Clermont County, Ohio
→1980Pfleger Family Houses — Cincinnati, Hamilton County, Ohio
→1979Pfleiderer Center for Religion and the Humanities — Tiffin, Seneca County, Ohio
→1979Philothea Catholic Church and Priest House — Philothea, Mercer County, Ohio
→1985Phoenix Block — Ravenna, Portage County, Ohio
→1985Phoenix Building/Cincinnati Club — Cincinnati, Hamilton County, Ohio
→1980Phoenix Club — Cincinnati, Hamilton County, Ohio
→1975Phoenix Mills — Steuben, Huron County, Ohio
→1982Piatt, Abram S., House and Piatt, Donn S., House — West Liberty, Logan County, Ohio
→1979Pickands, Jay M., House — Bratenahl, Cuyahoga County, Ohio
→1980Pickaway Settlements Battlesite — Enon, Clark County, Ohio
→1993Pickerington Carnegie Library — Pickerington, Fairfield County, Ohio
→1990Pickerington Depot — Fairfield, Fairfield County, Ohio
→1974Picking, D., And Company — Bucyrus, Crawford County, Ohio
→1983Pierce, Elijah, Properties — Columbus, Franklin County, Ohio
→1974Piketon Historic District — Piketon, Pike County, Ohio
→1976Pilgrim Congregational Church — Cleveland, Cuyahoga County, Ohio
→1980Pilgrim Presbyterian Church — Cincinnati, Hamilton County, Ohio
→1982Pine Meer — Cincinnati, Hamilton County, Ohio
→2008Pinecroft — Cincinnati, Hamilton County, Ohio
→1979Pinney Road Log Cabin — Dublin, Franklin County, Ohio
→1979Pinney, Dr. Eli, House — Dublin, Franklin County, Ohio
→2023Pioneer School — Zanesville, Muskingum County, Ohio
→1996Piqua High School — Piqua, Miami County, Ohio
→1971Piqua Historical Area State Memorial — Piqua, Miami County, Ohio
→1985Piqua-Caldwell Historic District — Piqua, Miami County, Ohio
→1980Pisgah Christian Church — Wilmington, Brown County, Ohio
→1969Pitman, Ben, House — Cincinnati, Hamilton County, Ohio
→1983Pittsburg, Cincinnati, and St. Louis Depot — Zanesville, Muskingum County, Ohio
→1988Pitzer, Anthony, Jr., House — Newark, Licking County, Ohio
→1985Plainview Farm — Casstown, Miami County, Ohio
→1978Playhouse Square Group — Cleveland, Cuyahoga County, Ohio
→1984Plaza Apartments — Cleveland, Cuyahoga County, Ohio
→1984Plaza Hotel — Columbus, Franklin County, Ohio
→2008Pleasant Hill — Milford, Clermont County, Ohio
→2002Pleasant Hill United Church of Christ — Pleasant Hill, Miami County, Ohio
→1993Pleasant Ridge United Methodist Church and Cemetery — Tiffin, Seneca County, Ohio
→1972Plum Street Temple ★ NHL — Cincinnati, Hamilton County, Ohio
→1996Plymouth Greenlawn Cemetery Chapel — Plymouth, Richland County, Ohio
→2014Poinciana Flats — Cincinnati, Hamilton County, Ohio
→1999Point, Nathaniel, Farm — Penisula, Summit County, Ohio
→1984Poland Center School — Poland, Mahoning County, Ohio
→1981Police Station No. 2 — Cincinnati, Hamilton County, Ohio
→1981Police Station No. 3 — Cincinnati, Hamilton County, Ohio
→1980Police Station No. 5 — Cincinnati, Hamilton County, Ohio
→1981Police Station No. 6 — Cincinnati, Hamilton County, Ohio
→1981Police Station No. 7 — Cincinnati, Hamilton County, Ohio
→1974Pollack, Isaac, House — Dayton, Montgomery County, Ohio
→1986Pollock, John C., House — Wyoming, Hamilton County, Ohio
→1980Pomerene House — Berlin, Holmes County, Ohio
→1978Pomeroy Historic District — Pomeroy, Meigs County, Ohio
→1980Pomeroy Historic District (Boundary Increase) — Pomeroy, Meigs County, Ohio
→1975Pomeroy, Alanson, House — Strongsville, Cuyahoga County, Ohio
→1973Ponn Humpback Covered Bridge — Wilkesville, Vinton County, Ohio
→2000Port Clinton City Hall — Port Clinton, Ottawa County, Ohio
→1982Port Jefferson School — Port Jefferson, Shelby County, Ohio
→1979Port Washington Town Hall — Port Washington, Tuscarawas County, Ohio
→1988Portage Hotel — Akron, Summit County, Ohio
→2002Porter-Aue House — Clinton, Summit County, Ohio
→1989Porter, Orin, House — Hudson, Summit County, Ohio
→1987Portsmouth Fire Department No. 1 — Portsmouth, Scioto County, Ohio
→1987Portsmouth Foundry and Machine Works — Portsmouth, Scioto County, Ohio
→1985Potters National Bank — East Liverpool, Columbiana County, Ohio
→1985Potters Savings and Loan — East Liverpool, Columbiana County, Ohio
→1995Pottorf, Henry and Mary, House and Farmstead — Mechanicstown, Carroll County, Ohio
→1986Powell, Andrew, Homestead — Findlay, Hancock County, Ohio
→1980Powell, Henry, House — Cincinnati, Hamilton County, Ohio
→1999Power Building — Cincinnati, Hamilton County, Ohio
→1975Pray-Starkweather House — Waterville, Lucas County, Ohio
→1986Prentiss--Tulford House — Columbus, Franklin County, Ohio
→1986Prentiss, Frederick, House — Columbus, Franklin County, Ohio
→1980Presbyterian Parsonage — Westerville, Franklin County, Ohio
→1979President's House — Tiffin, Seneca County, Ohio
→1979Pretzinger, Rudolph, House — Dayton, Montgomery County, Ohio
→1995Price Corners — Plain City, Madison County, Ohio
→2002Price, Jonathan, House — Clinton, Summit County, Ohio
→1980Principal's Cottage — Worthington, Franklin County, Ohio
→1997Pringle--Patric House — Springfield, Clark County, Ohio
→1980Probasco Fountain — Cincinnati, Hamilton County, Ohio
→1972Probasco, Henry, House — Cincinnati, Hamilton County, Ohio
→1984Procter and Collier-Beau Brummell Building — Cincinnati, Hamilton County, Ohio
→1980Promont — Milford, Clermont County, Ohio
→1974Prospect Avenue Row House Group — Cleveland, Cuyahoga County, Ohio
→1980Prospect Hill Historic District — Cincinnati, Hamilton County, Ohio
→1979Prospect Place — Trinway, Muskingum County, Ohio
→1975Providence Historic District — Providence, Lucas County, Ohio
→1983Pugh-Kittle House — Baltimore, Fairfield County, Ohio
→1975Pugh's Mill Covered Bridge — Oxford, Butler County, Ohio
→2004Purcell, Robert A. and Elizabeth H., House — Alliance, Stark County, Ohio
→1987Purdum--Tracy House — Portsmouth, Scioto County, Ohio
→1992Putman, Walter S., House — Wilmot, Stark County, Ohio
→1974Putnam County Courthouse — Ottawa, Putnam County, Ohio
→1975Putnam Historic District — Zanesville, Muskingum County, Ohio
→1970Putnam, Rufus, House — Marietta, Washington County, Ohio
→1972Pythian Castle — Toledo, Lucas County, Ohio
→1983Pythian Temple and James Pythian Theater — Columbus, Franklin County, Ohio
→1988Quad Hall — Cleveland, Cuyahoga County, Ohio
→1978Quaker Oats Cereal Factory — Akron, Summit County, Ohio
→1995Race Street Historic District — Cincinnati, Hamilton County, Ohio
→2023Radnor Township Hall — Radnor, Delaware County, Ohio
→1979Rae, Capt., House — Vermilion, Erie County, Ohio
→2003Raemelton Farm Historic District — Mansfield, Richland County, Ohio
→1990Rager, John, Farmhouse — Canal Winchester, Franklin County, Ohio
→1994Ragersville School — Ragersville, Tuscarawas County, Ohio
→2009Railway Chapel, The — Dennison, Tuscarawas County, Ohio
→1979Randall, Dr. Rufus, Residence — Bath, Summit County, Ohio
→1982Rankin Building — Columbus, Franklin County, Ohio
→1979Rankin Historic District — Ironton, Lawrence County, Ohio
→1970Rankin, John, House ★ NHL — Ripley, Brown County, Ohio
→1988Ranney, Luther B., Farm — Boston Heights, Summit County, Ohio
→1980Ransbottom, C. W., House — Roseville, Muskingum County, Ohio
→1980Ransbottom, Edward, House — Roseville, Muskingum County, Ohio
→1980Ransbottom, Frank M., House — Roseville, Muskingum County, Ohio
→1980Ransbottom, Mort, House — Roseville, Muskingum County, Ohio
→1980Ransley Apartment Building — Cincinnati, Hamilton County, Ohio
→1982Ratterman, Bernard, House — Cincinnati, Hamilton County, Ohio
→1980Rattermann, Heinrich A., House — Cincinnati, Hamilton County, Ohio
→2016Rauh, Frederick and Harriet, House — Woodlawn, Hamilton County, Ohio
→1988Rawlings--Brownell House — Washington Court House, Fayette County, Ohio
→1973Rawson House — Cincinnati, Hamilton County, Ohio
→1974Rayen School — Youngstown, Mahoning County, Ohio
→1995Raymond, Frank Mason, House — Akron, Summit County, Ohio
→1975Raymond, Liberty G., Tavern and Barn — Kenilworth, Trumbull County, Ohio
→2017Reakirt Building — Cincinnati, Hamilton County, Ohio
→1980Realty Building — Youngstown, Mahoning County, Ohio
→1977Reaves, John, House — Freeport, Harrison County, Ohio
→1975Reber, Valentine, House — Lancaster, Fairfield County, Ohio
→2013Record Rendezvous — Cleveland, Cuyahoga County, Ohio
→1975Red Brick Tavern — Lafayette, Madison County, Ohio
→1982Red Oak Presbyterian Church — Ripley, Brown County, Ohio
→2000Red Oak--Sherman, William C., House — Dayton, Montgomery County, Ohio
→1982Red Popcorn Wagon — Sandusky, Erie County, Ohio
→1979Redington Block — Elyria, Lorain County, Ohio
→1982Redlands — Circleville, Pickaway County, Ohio
→1975Reed Covered Bridge — Marysville, Union County, Ohio
→1985Reed, C. A., House — Ravenna, Portage County, Ohio
→1978Reed, Henry, Jr., House — Maumee, Lucas County, Ohio
→1979Reed, James, House — Fredericktown, Knox County, Ohio
→1987Reed, Joseph G., Company — Portsmouth, Scioto County, Ohio
→1979Reefy, Frederick, House — Elyria, Lorain County, Ohio
→1980Reeser, C. A., House — Springfield, Clark County, Ohio
→1982Reeves, Jeremiah, House and Carriage House — Dover, Tuscarawas County, Ohio
→2023Regal Theater — Cincinnati, Hamilton County, Ohio
→1973Reid, Whitelaw, House — Cedarville, Greene County, Ohio
→2018Reidy Bros. & Flanigan Building — Lakewood, Cuyahoga County, Ohio
→1986Reily, Robert, House — Wyoming, Hamilton County, Ohio
→1982Renick Farm — South Bloomfield, Pickaway County, Ohio
→1973Renick House, Paint Hill — Chillicothe, Ross County, Ohio
→1981Renkert, Harry S., House — Canton, Stark County, Ohio
→1976Renner, George J., Jr., House — Youngstown, Mahoning County, Ohio
→1983Rentschler House — Hamilton, Butler County, Ohio
→1982Renz Block — Lima, Allen County, Ohio
→1986Republic Iron and Steel Office Building — Youngstown, Mahoning County, Ohio
→1973Resor, William, House — Cincinnati, Hamilton County, Ohio
→1986Retszch, W. C., House — Wyoming, Hamilton County, Ohio
→1976Reynolds, John R., House — Dayton, Montgomery County, Ohio
→1980Rhoads, Peter F., House — Newark, Licking County, Ohio
→2007Rhodes and Watters Apartment Buildings, The — Akron, Summit County, Ohio
→1986Rial, York, House — Piqua, Miami County, Ohio
→1979Rich, Charles B., House — Brecksville, Cuyahoga County, Ohio
→2003Rich, N.J., and Co. Building — Cleveland, Cuyahoga County, Ohio
→1979Richard, John, Residence — Bath, Summit County, Ohio
→1995Richards--Sewall House — Urbana, Champaign County, Ohio
→1993Richey, James, Farmhouse — Delaware, Delaware County, Ohio
→2001Richland County Infirmary — Mansfield, Richland County, Ohio
→1983Richland Trust Building — Mansfield, Richland County, Ohio
→2012Richman Brothers Company, The — Cleveland, Cuyahoga County, Ohio
→1976Rickenbacker, Capt. Edward V., House ★ NHL — Columbus, Franklin County, Ohio
→1976Riddle Block — Ravenna, Portage County, Ohio
→1985Riddle Block #11 — Ravenna, Portage County, Ohio
→1985Riddle Block #5 — Ravenna, Portage County, Ohio
→1985Riddle Block #9 — Ravenna, Portage County, Ohio
→1986Riddle--Friend House — Wyoming, Hamilton County, Ohio
→1979Rider, Adam, House — Roseville, Muskingum County, Ohio
→1982Ridgewood Historic District — Canton, Stark County, Ohio
→2023Riley Specialty Shoe Company — Logan, Hocking County, Ohio
→1978Riley, Calvin E., House — Celina, Mercer County, Ohio
→1979Riley, F., House — Dublin, Franklin County, Ohio
→1976Rinard Covered Bridge — Marietta, Washington County, Ohio
→1991Rinderknecht, Christian H., House — Dover, Tuscarawas County, Ohio
→1978Rinehart, Hugh T., House — Uniopolis, Auglaize County, Ohio
→1979Rings, Louis, Barn #1 — Dublin, Franklin County, Ohio
→1979Rings, Louis, Barn #2 — Amlin, Franklin County, Ohio
→1979Rings, Louis, Residence — Dublin, Franklin County, Ohio
→1985Ripley Historic District — Ripley, Brown County, Ohio
→1980Ripley House — Worthington, Franklin County, Ohio
→1978Ritter, William, House — Mansfield, Richland County, Ohio
→1987Riverside Cemetery Building — Cleveland, Cuyahoga County, Ohio
→1987Riverside Cemetery Chapel — Cleveland, Cuyahoga County, Ohio
→1977Riverside Chapel — Defiance, Defiance County, Ohio
→2012Riverview — Toledo, Lucas County, Ohio
→1983Riverview Apartments — Toledo, Lucas County, Ohio
→2023Riverview House Apartments — Cincinnati, Hamilton County, Ohio
→2021Roach, Moses and Minerva, House — Twinsburg, Summit County, Ohio
→1982Roas-Ilhardt Farm and Winery — New Richmond, Clermont County, Ohio
→1979Robb, L. B., Drugstore — Cincinnati, Hamilton County, Ohio
→1971Roberts Covered Bridge — Eaton, Preble County, Ohio
→1976Robeson, Dr. Donovan, House — Greenville, Darke County, Ohio
→1987Robinson--Pavey House — Washington Court House, Fayette County, Ohio
→1991Robinson, Byron W., House — Akron, Summit County, Ohio
→1979Robinson, Edmund, House — Lebanon, Warren County, Ohio
→2005Rochester Square Historic District — Navarre, Stark County, Ohio
→2005Rock Creek School — Rock Creek, Ashtabula County, Ohio
→2009Rock Hill Presbyterian Church — Bellaire, Belmont County, Ohio
→1983Rock Hollow School — Ringgold, Morgan County, Ohio
→1990Rock Mill — Lancaster, Fairfield County, Ohio
→1976Rock Mill Covered Bridge — Rock Mill, Fairfield County, Ohio
→1973Rockefeller Building — Cleveland, Cuyahoga County, Ohio
→2005Rockefeller Park and Cleveland Cultural Gardens Historic District — Cleveland, Cuyahoga County, Ohio
→1977Rockefeller Park Bridges — Cleveland, Cuyahoga County, Ohio
→1998Rodrick Bridge — Newark, Licking County, Ohio
→1980Rogers House — Granville, Licking County, Ohio
→1978Rohr, David, Mansion And Carriage House — Germantown, Montgomery County, Ohio
→1979Rombach Place — Wilmington, Clinton County, Ohio
→1972Rookwood Pottery — Cincinnati, Hamilton County, Ohio
→1980Root and McBride-Bradley Building — Cleveland, Cuyahoga County, Ohio
→1975Root Covered Bridge — Decaturville, Washington County, Ohio
→1975Root, A. I. And E. R., Homestead — Medina, Medina County, Ohio
→1982Root, Joseph, House — Sandusky, Erie County, Ohio
→1978Root, William H., House — Lorain, Lorain County, Ohio
→1982Ropes, Nathaniel, Building — Cincinnati, Hamilton County, Ohio
→1973Roscoe Village — Coshocton, Coshocton County, Ohio
→1994Rose Hill and Community House — Bay Village, Cuyahoga County, Ohio
→1980Rose, Capt. Levi, House — Granville, Licking County, Ohio
→1978Roseville High School — Roseville, Muskingum County, Ohio
→1982Ross Hardware — Sandusky, Erie County, Ohio
→1982Ross-Gowdy House — New Richmond, Clermont County, Ohio
→1975Rossville Historic District — Hamilton, Butler County, Ohio
→1976Roudebush Farm — Harrison, Hamilton County, Ohio
→1980Round Barn — Van Wert, Van Wert County, Ohio
→1976Round Hill — Mount Vernon, Knox County, Ohio
→1975Royalton House — Royalton, Fairfield County, Ohio
→1976Rubicon Farm — Dayton, Montgomery County, Ohio
→1975Ruggles, Charles, House — Canfield, Mahoning County, Ohio
→1982Rummell Mill — Butler, Richland County, Ohio
→2003Rush Creek Village Historic District — Worthington, Franklin County, Ohio
→1980Rushville Historic District — Rushville, Fairfield County, Ohio
→1980Russell, Charles B., House — Cincinnati, Hamilton County, Ohio
→1976Russell, Mark, House — Riverlea, Franklin County, Ohio
→1966S Bridge, National Road ★ NHL — Old Washington, Guernsey County, Ohio
→1991Sachs and Pruden Ale Company Building — Dayton, Montgomery County, Ohio
→1973Sacred Heart Academy — Cincinnati, Hamilton County, Ohio
→1987Sacred Heart Church — Dayton, Montgomery County, Ohio
→1986Sacred Heart of Jesus Churches — Bethlehem, Richland County, Ohio
→1979Sacred Heart of Jesus Rectory — McCartyville, Shelby County, Ohio
→1979Sage House — Wellington, Lorain County, Ohio
→1979Sail Loft — Vermilion, Erie County, Ohio
→1986Saint Anne's Hill Historic District — Dayton, Montgomery County, Ohio
→1997Saint John the Evangelist Catholic Church Complex — Logan, Hocking County, Ohio
→1986Saint Joseph's Catholic Church — Somerset, Perry County, Ohio
→2010Saint Joseph's Roman Catholic Church — Massillon, Stark County, Ohio
→1988Saint Mary's Episcopal Church and Parish House — Hillsboro, Highland County, Ohio
→1986Saint Paul's Episcopal Church — Columbus, Franklin County, Ohio
→1987Saint Peter and Saint Paul Historic District--Oliver's Second addition — Toledo, Lucas County, Ohio
→1986Saint Philip's Episcopal Church — Circleville, Pickaway County, Ohio
→1990Salem Bear Creek Church, Salem Evangelical Lutheran Church — Germantown, Montgomery County, Ohio
→1992Salem Church — Sardis, Monroe County, Ohio
→1995Salem Downtown Historic District — Salem, Columbiana County, Ohio
→1982Salem Methodist Church Complex — Cincinnati, Hamilton County, Ohio
→1995Salem Methodist Episcopal Church — Salem, Columbiana County, Ohio
→1974Salt Creek Covered Bridge — Norwich, Muskingum County, Ohio
→1976Salt House — Bethel, Clermont County, Ohio
→1985Sanborn Hall — Delaware, Delaware County, Ohio
→1983Sandiford, Robert, House — Mansfield, Richland County, Ohio
→2017Sands, George F., School — Cincinnati, Hamilton County, Ohio
→1997Sandusky County Jail and Sheriff's House — Fremont, Sandusky County, Ohio
→1982Sandusky Street Historic District — Delaware, Delaware County, Ohio
→1987Sarchet-Burgess House — Cambridge, Guernsey County, Ohio
→1979Sarchet, Peter B., House — Cambridge, Guernsey County, Ohio
→1988Satterthwaite, John, House — Waynesville, Warren County, Ohio
→2010Saunders Seed Company — Tipp City, Miami County, Ohio
→1976Saunders, Elizabeth Sheets, Farm — Casstown, Miami County, Ohio
→1980Savage-Stewart House — Canaanville, Athens County, Ohio
→1984Sawyer-Curtis House — Little Hocking, Washington County, Ohio
→1974Sawyer-Wayside House — Mentor, Lake County, Ohio
→1986Sawyer, Louis, House — Wyoming, Hamilton County, Ohio
→1980Saxony Apartment Building — Cincinnati, Hamilton County, Ohio
→1979Saxton House — Canton, Stark County, Ohio
→1973Scarlet Oaks — Cincinnati, Hamilton County, Ohio
→1974Schafer House — Neville, Clermont County, Ohio
→1990Schaller Memorial Building — Perrysburg, Wood County, Ohio
→2021Schantz Organ Company — Orrville, Wayne County, Ohio
→1992Schantz Park Historic District — Oakwood, Montgomery County, Ohio
→1980Schantz, Adam Sr., House — Oakton, Montgomery County, Ohio
→1982Schine State Theatre — Sandusky, Erie County, Ohio
→2001Schine's Holland Theatre — Bellefontaine, Logan County, Ohio
→1988Schlee Brewery Historic District — Columbus, Franklin County, Ohio
→1982Schlee-Kemmler Building — Columbus, Franklin County, Ohio
→1991Schmick, Charles Nelson, House — Leetonia, Columbiana County, Ohio
→2002Schmitt, Louis, House and Store — Clinton, Summit County, Ohio
→1970Schoenbrunn Site — New Philadelphia, Tuscarawas County, Ohio
→1982Schooley, Dr. Lindley, House and Office — Belmont, Belmont County, Ohio
→1988Schriber, Hyman, Building — Dayton, Montgomery County, Ohio
→1984Schrock, Peter, Jr., Farm — Trenton, Butler County, Ohio
→1986Schueller, Erwin W., House — Columbus, Franklin County, Ohio
→1982Schuffenecker, August Building — Canton, Stark County, Ohio
→1980Schuter Carpenter Shop and House — West Carrollton, Montgomery County, Ohio
→1973Schweinfurth, Charles, House — Cleveland, Cuyahoga County, Ohio
→1994Science Hill School — Alliance, Stark County, Ohio
→1987Scioto County Courthouse — Portsmouth, Scioto County, Ohio
→2005Scioto Grange No. 1234 — Jackson, Jackson County, Ohio
→1984Scioto Street Historic District — Urbana, Champaign County, Ohio
→1987Scioto Township District No. 2 Schoolhouse — Orient, Pickaway County, Ohio
→1986Scofield--Sanor House — Columbus, Franklin County, Ohio
→2020Scofield, Levi, House — Cleveland, Cuyahoga County, Ohio
→1980Scott, George, House — Cincinnati, Hamilton County, Ohio
→2005Scott, John, Barn and Granary — Shandon, Butler County, Ohio
→2023Scott, Matthew, House — Fairview, Guernsey County, Ohio
→1987Scott, William, House — Hillsboro, Highland County, Ohio
→1975Scottown Covered Bridge — Scottown, Lawrence County, Ohio
→1974Scroggs House — Bucyrus, Crawford County, Ohio
→1979Sears, A. B., House — Chesterville, Morrow County, Ohio
→2023Sears, Roebuck and Company — Trotwood, Montgomery County, Ohio
→1978Seborn, Frederick Augustus, House — Zanesville, Muskingum County, Ohio
→1989Sebring, Frank, House — Sebring, Mahoning County, Ohio
→1985Second Baptist Church — Mechanicsburg, Champaign County, Ohio
→2002Second Baptist Church — Sandusky, Erie County, Ohio
→1979Second Hosack House — Fredericktown, Knox County, Ohio
→1983Second Presbyterian Church — Columbus, Franklin County, Ohio
→1996Second Presbyterian Church — Portsmouth, Scioto County, Ohio
→1983Second Street Historic District — Portsmouth, Scioto County, Ohio
→1976Secor Hotel — Toledo, Lucas County, Ohio
→1979Secor, Joseph K., House — Toledo, Lucas County, Ohio
→2008Sedamsville River Road Historic District — Cincinnati, Hamilton County, Ohio
→2012Sedamsville Village Historic District — Cincinnati, Hamilton County, Ohio
→1973Seeley, Uri, House — Painesville, Lake County, Ohio
→1972Seely, Dr. John W., House — Howland Corners, Trumbull County, Ohio
→1976Seher, William, House — Lorain, Lorain County, Ohio
→1993Seiberling, Charles Willard, House — Akron, Summit County, Ohio
→1981Seip House — Chillicothe, Ross County, Ohio
→1985Selby Field — Delaware, Delaware County, Ohio
→2009Selby Shoe Company Building — Ironton, Lawrence County, Ohio
→1980Selby, Orland, House — Madison, Lake County, Ohio
→2005Selle Gear Company — Akron, Summit County, Ohio
→1979Sells, Benjamin, Barn #1 — Dublin, Franklin County, Ohio
→1979Sells, Benjamin, Barn #2 — Dublin, Franklin County, Ohio
→1975Sells, Benjamin, House — Dublin, Franklin County, Ohio
→1979Sells, Benjamin, Wash House — Dublin, Franklin County, Ohio
→1979Sells, David, Barn — Dublin, Franklin County, Ohio
→1979Sells, Eliud, House — Dublin, Franklin County, Ohio
→1979Sells, William Henry, House — Dublin, Franklin County, Ohio
→1983Seneca Hotel — Columbus, Franklin County, Ohio
→1966Serpent Mound ★ NHL — Locust Grove, Adams County, Ohio
→1982Serquet, Emanuel and Frederick, Farm — Wilmont, Stark County, Ohio
→1973Sessions House — Painesville, Lake County, Ohio
→1975Sessions Village — Columbus, Franklin County, Ohio
→1976Seven Ranges Terminus — Magnolia, Stark County, Ohio
→2020Seville Inn — Seville, Medina County, Ohio
→1997Seville Jail — Seville, Medina County, Ohio
→1979Seymour, William H., House — Weymouth, Medina County, Ohio
→1974Shack, The — Williamsport, Pickaway County, Ohio
→2012Shaker Farm Historic District — Cleveland Heights, Cuyahoga County, Ohio
→1976Shaker Square — Cleveland, Cuyahoga County, Ohio
→1983Shaker Square Historic District (Boundary Increase) — Cleveland, Cuyahoga County, Ohio
→1984Shaker Village Historic District — Shaker Heights, Cuyahoga County, Ohio
→2001Shaker Village Historic District (Boundary Increase) — Shaker Heights, Cuyahoga County, Ohio
→1982Shambaugh, George, House — Perrysville, Richland County, Ohio
→1974Shandy Hall — Geneva, Ashtabula County, Ohio
→1980Sharon Center Public Square Historic District — Sharon Center, Medina County, Ohio
→1980Sharon Township Town Hall — Worthington, Franklin County, Ohio
→1986Sharp--Page House — Columbus, Franklin County, Ohio
→1974Sharp, Morris, House — Washington Court House, Fayette County, Ohio
→1982Sharp, Samuel, House — Ashley, Delaware County, Ohio
→1982Sharp, Stephen, House — Westerville, Delaware County, Ohio
→1985Shaub, Martin, Mill Site/House — Alexandria, Licking County, Ohio
→1974Shaw Farm — Ross, Butler County, Ohio
→1979Shaw, Samuel, Residence — Bath, Summit County, Ohio
→1979Shaw, Sylvester, Residence — Bath, Summit County, Ohio
→1991Shawen Acres — Dayton, Montgomery County, Ohio
→1985Shawnee Hotel — Springfield, Clark County, Ohio
→1986Shedd--Dunn House — Columbus, Franklin County, Ohio
→1988Sheets, Andrew, House — Elizabeth Township, Miami County, Ohio
→1978Sheffield Village Hall — Sheffield, Lorain County, Ohio
→1982Shelby Center Historic District — Shelby, Richland County, Ohio
→1978Shelby House — Botkins, Shelby County, Ohio
→1982Sheltering Arms Hospital — Athens, Athens County, Ohio
→1989SHENANDOAH Crash Sites — Caldwell, Noble County, Ohio
→1979Shepard Street School — Gahanna, Franklin County, Ohio
→1980Sheridan House — Somerset, Perry County, Ohio
→1966Sherman, John, Birthplace ★ NHL — Lancaster, Fairfield County, Ohio
→1983Sherman, John, Memorial Gateway — Mansfield, Richland County, Ohio
→1977Sherwood-Davidson And Buckingham Houses — Newark, Licking County, Ohio
→1978Shield's Block — Newark, Licking County, Ohio
→1982Shield's, Edwin M., House — Loveland, Hamilton County, Ohio
→1979Shier, Carl H., Barn — Amlin, Franklin County, Ohio
→1979Shier, Carl H., Chicken House — Amlin, Franklin County, Ohio
→1979Shier, Carl H., House — Amlin, Franklin County, Ohio
→1982Shiloh Baptist Church — Cleveland, Cuyahoga County, Ohio
→2004Shiloh Baptist Church — Columbus, Franklin County, Ohio
→1976Shinn Covered Bridge — Bartlett, Washington County, Ohio
→1979Shipherd, John J., House — Elyria, Lorain County, Ohio
→2000Shore High School — Euclid, Cuyahoga County, Ohio
→1990Short North Historic District — Columbus, Franklin County, Ohio
→1980SHOWBOAT MAJESTIC — Cincinnati, Hamilton County, Ohio
→1975Shuey's Mill — Germantown, Montgomery County, Ohio
→2023Shuler & Benninghofen Woolen Mill — Hamilton, Butler County, Ohio
→1979Shull-Lugenbuhl Farm — Winesburgh, Holmes County, Ohio
→1980Sidney Courthouse Square Historic District — Sidney, Shelby County, Ohio
→1983Sidney Walnut Avenue Historic District — Sidney, Shelby County, Ohio
→1978Sidney Waterworks And Electric Light Building — Sidney, Shelby County, Ohio
→1991Sig's General Store — Dayton, Montgomery County, Ohio
→2005Sigma Aplpha Epsilon Chapter House of Miami University — Oxford, Butler County, Ohio
→2005Silk City Diner #4655 — Sabina, Clinton County, Ohio
→1991Simmons, Edwin H., House — Perrysburg, Wood County, Ohio
→1982Simpson, Walter, House — Sandusky, Erie County, Ohio
→1982Simpson, William A., House — Sandusky, Erie County, Ohio
→2019Sisler, Dr. Louis, House — Akron, Summit County, Ohio
→1988Sixth Street Historic District — Portsmouth, Scioto County, Ohio
→1980Skeele, Capt. J. S., House — Worthington, Franklin County, Ohio
→1996Skywood Farms — Centerville, Montgomery County, Ohio
→1998Slingluff, Dr. Joseph, House — Dover, Tuscarawas County, Ohio
→1975Sloane, Rush R., House — Sandusky, Erie County, Ohio
→1985Slocum Hall — Delaware, Delaware County, Ohio
→1983Smart Building — Willoughby, Lake County, Ohio
→1974Smead House — Painesville, Lake County, Ohio
→1980Smead, David, House — Madison, Lake County, Ohio
→2011Smith Orr Homestead — Orrville, Wayne County, Ohio
→1980Smith Road Bridge — Bucyrus, Crawford County, Ohio
→1985Smith-Davis House — Lebanon, Warren County, Ohio
→1984Smith-Jessup House — Cincinnati, Hamilton County, Ohio
→1973Smith, Benjamin, House — Columbus, Franklin County, Ohio
→1997Smith, Charles William and Anna, House — Elyria, Lorain County, Ohio
→2002Smith, David, House — Clinton, Summit County, Ohio
→1985Smith, Dr. Robert, House ★ NHL — Akron, Summit County, Ohio
→1987Smith, Edward, Jr., Farm — Washington Court House, Fayette County, Ohio
→1974Smith, Edwin, House — Dayton, Montgomery County, Ohio
→1978Smith, Samuel, House And Tannery — Greenfield, Highland County, Ohio
→1982Smith, William R., House — Zanesville, Muskingum County, Ohio
→2003Smith, William, House — Clinton, Summit County, Ohio
→2014Snider, Dan F., Ford Dealership Building — Middletown, Butler County, Ohio
→1973Snow, John, House — Worthington, Franklin County, Ohio
→1982Snow, Russ and Holland, Houses — Brecksville, Cuyahoga County, Ohio
→1979Social Science House — Tiffin, Seneca County, Ohio
→1976Society for Savings Building — Cleveland, Cuyahoga County, Ohio
→1980Soldiers and Sailors Memorial Building and Madison Theater — Mansfield, Richland County, Ohio
→1979Soldiers and Sailors Monument — Elyria, Lorain County, Ohio
→1991Soldiers Memorial Parkway and McKinley Memorial Parkway — Fremont, Sandusky County, Ohio
→1995Soldiers' and Sailors' Memorial Chapel — Marion, Marion County, Ohio
→2014Somerset Apartments, The — Cincinnati, Hamilton County, Ohio
→1975Somerset Historic District — Somerset, Perry County, Ohio
→2002Sorrick--Oster Store — Clinton, Summit County, Ohio
→1990South Bass Island Light — South Bass Island, Ottawa County, Ohio
→2005South Brooklyn Commercial District — Cleveland, Cuyahoga County, Ohio
→1978South Charleston Historic District — South Charleston, Clark County, Ohio
→2021South Crescent Arms, The — Cincinnati, Hamilton County, Ohio
→1983South Fountain Avenue Historic District — Springfield, Clark County, Ohio
→1983South High Street Commercial Grouping — Columbus, Franklin County, Ohio
→1979South Leroy Meetinghouse — Painesville, Lake County, Ohio
→1993South Lincoln Avenue Historic District — Salem, Columbiana County, Ohio
→1978South Main Street District — Middletown, Butler County, Ohio
→1974South Main Street District — Poland, Mahoning County, Ohio
→1984South Main Street District (Boundary Increase) — Poland, Mahoning County, Ohio
→2008South Main Street Historic District — Akron, Summit County, Ohio
→2012South Newbury Union Chapel — Newbury, Geauga County, Ohio
→1984South Park Historic District — Dayton, Montgomery County, Ohio
→1988South Park Historic District (Boundary Increase) — Dayton, Montgomery County, Ohio
→1985South Ridge Schoolhouse — Amherst Township, Lorain County, Ohio
→1979South Salem Academy — South Salem, Ross County, Ohio
→1975South Salem Covered Bridge — South Salem, Ross County, Ohio
→1980South Sandusky Avenue Historic District — Upper Sandusky, Wyandot County, Ohio
→1989South School — Yellow Springs, Greene County, Ohio
→1993South South Street Historic District — Wilmington, Clinton County, Ohio
→1979Southern Ohio Lunatic Asylum — Dayton, Montgomery County, Ohio
→1986Southern Park Stable — Boardman, Mahoning County, Ohio
→2012Southington Township School (Boundary Increase) — Southington, Trumbull County, Ohio
→1984Southworth House — Cleveland, Cuyahoga County, Ohio
→1985Spacecraft Propulsion Research Facility ★ NHL — Sandusky, Erie County, Ohio
→1974Spafford House — Perrysburg, Wood County, Ohio
→2018Spang, J., Baking Company — Cleveland, Cuyahoga County, Ohio
→1997Speaker, Charles, House — Defiance, Defiance County, Ohio
→1979Spencer Town Hall — Cincinnati, Hamilton County, Ohio
→1992Spencer's Landing — Belpre, Washington County, Ohio
→1973Spitler, Samuel, House — Brookville, Montgomery County, Ohio
→1983Spitzer Building — Toledo, Lucas County, Ohio
→1979Sprague House — Wellington, Lorain County, Ohio
→1979Sprague--Deaver House — Fredericktown, Knox County, Ohio
→1983Sprague, Jonathan, House — Lowell, Washington County, Ohio
→2003Spread Eagle Tavern--Conrey, James D., House — Cincinnati, Butler County, Ohio
→1976Spring Grove Cemetery ★ NHL — Cincinnati, Hamilton County, Ohio
→2006Spring Grove Cemetery — Medina, Medina County, Ohio
→1980Spring Grove Cemetery Chapel — Cincinnati, Hamilton County, Ohio
→1996Spring Grove Historic District — Toledo, Lucas County, Ohio
→1999Springboro Historic District — Springboro, Warren County, Ohio
→1993Springdale — Tiffin, Seneca County, Ohio
→2016Springfield Metallic Casket Company — Springfield, Clark County, Ohio
→2003Springfield Township School — Ontario, Richland County, Ohio
→1972Square 13 Historic District — Lancaster, Fairfield County, Ohio
→1974Squire's Glen Farm — Central College, Franklin County, Ohio
→2010Squirrel--Forrest Historic District — Dayton, Montgomery County, Ohio
→1991St. Adalbert Polish Catholic Church — Dayton, Montgomery County, Ohio
→1979St. Aloysius Catholic Church — Carthagena, Mercer County, Ohio
→2012St. Aloysius Orphanage — Cincinnati, Hamilton County, Ohio
→2014St. Aloysius--on--the--Ohio — Cincinnati, Hamilton County, Ohio
→1979St. Andrew's Episcopal Church — Elyria, Lorain County, Ohio
→1983St. Ann Roman Catholic Church Complex — Toledo, Lucas County, Ohio
→1979St. Anthony Catholic Church, Padua — St. Anthony, Mercer County, Ohio
→1979St. Augustine Catholic Church — Minster, Auglaize County, Ohio
→1982St. Augustine's Catholic Church — Napoleon, Henry County, Ohio
→1979St. Bernard Catholic Church and Rectory — Burketsville, Mercer County, Ohio
→1989St. Bernard's Church — Akron, Summit County, Ohio
→1982St. Boniface Roman Catholic Church, School, Rectory, and Convent of the Sister of the Precious Blood — New Riegel, Seneca County, Ohio
→1979St. Charles Seminary and Chapel — Carthagena, Mercer County, Ohio
→2001St. Clair Hospital — Columbus, Franklin County, Ohio
→1978St. Clair Street Bridge — Eaton, Preble County, Ohio
→1975St. Clair Street Historic District — Toledo, Lucas County, Ohio
→1994St. Clairsville Historic District — St. Clairsville, Belmont County, Ohio
→2005St. Edward Hotel — Canton, Stark County, Ohio
→1976St. Elizabeth's Magyar Roman Catholic Church — Cleveland, Cuyahoga County, Ohio
→1979St. Francis Catholic Church and Rectory — Cranberry Prairie, Mercer County, Ohio
→1974St. Francis De Sales Church Historic District — Cincinnati, Hamilton County, Ohio
→1984St. Francis Hospital — Cincinnati, Hamilton County, Ohio
→1999St. Francis Seminary — Springfield, Hamilton County, Ohio
→1980St. Francis Xavier Church — Cincinnati, Hamilton County, Ohio
→1980St. George Parish and Newman Center — Cincinnati, Hamilton County, Ohio
→1979St. Henry Catholic Church — St. Henry, Mercer County, Ohio
→1982St. Henry Roman Catholic Church and Rectory — Harriettsville, Noble County, Ohio
→1974St. Ignatius High School — Cleveland, Cuyahoga County, Ohio
→1979St. James Episcopal Church — Boardman, Mahoning County, Ohio
→1975St. James Episcopal Church — Painesville, Lake County, Ohio
→1978St. James Episcopal Church — Zanesville, Muskingum County, Ohio
→1980St. John Catholic Church — Delphos, Allen County, Ohio
→1979St. John Catholic Church and Parish Hall — Fryburg, Auglaize County, Ohio
→1977St. John The Baptist Roman Catholic Church — Glandorf, Putnam County, Ohio
→1982St. John's AME Church — Cleveland, Cuyahoga County, Ohio
→1975St. John's Catholic Church — Canton, Stark County, Ohio
→1973St. John's Episcopal Church — Cleveland, Cuyahoga County, Ohio
→1980St. John's Episcopal Church — Worthington, Franklin County, Ohio
→2012St. John's Episcopal Church — Youngstown, Mahoning County, Ohio
→1980St. John's Evangelical Lutheran Church — Stovertown, Muskingum County, Ohio
→2006St. John's Evangelical Lutheran Church — Springfield, Clark County, Ohio
→1982St. John's Lutheran Church — Zanesville, Muskingum County, Ohio
→1979St. John's Lutheran Church — Sandy Corners, Franklin County, Ohio
→1979St. Joseph Catholic Church and Rectory — St. Joe, Mercer County, Ohio
→1979St. Joseph Catholic Church and School — Wapakoneta, Auglaize County, Ohio
→2006St. Joseph Convent and Academy Complex — Garfield Heights, Cuyahoga County, Ohio
→1982St. Joseph Roman Catholic Church — Springfield, Clark County, Ohio
→2020St. Joseph Roman Catholic Church Complex — Canton, Stark County, Ohio
→1976St. Joseph's Church and Friary — Cleveland, Cuyahoga County, Ohio
→1982St. Ladislaus Roman Catholic Church — Lorain, Lorain County, Ohio
→1979St. Louis Catholic Church and Rectory — North Star, Darke County, Ohio
→1979St. Louis Church — Louisville, Stark County, Ohio
→1976St. Luke's Episcopal Church — Granville, Licking County, Ohio
→2005St. Luke's Hospital — Cleveland, Cuyahoga County, Ohio
→1973St. Mark's Episcopal Church — Wadsworth, Medina County, Ohio
→1975St. Martin's Catholic Church — Valley City, Medina County, Ohio
→1979St. Mary Parish Hall — Vermilion, Erie County, Ohio
→1983St. Mary Roman Catholic Church — Dayton, Montgomery County, Ohio
→1975St. Mary's Catholic Church — Sandusky, Erie County, Ohio
→1979St. Mary's Catholic Church — Massillon, Stark County, Ohio
→1979St. Mary's Catholic School — Elyria, Lorain County, Ohio
→1980St. Mary's Church and Rectory — Delaware, Delaware County, Ohio
→1980St. Mary's Church of the Immaculate Conception — Fulda, Noble County, Ohio
→1982St. Mary's Girls Grade School — Sandusky, Erie County, Ohio
→1973St. Mary's Hall, University Of Dayton — Dayton, Montgomery County, Ohio
→1977St. Mary's Of Morges — Waynesburg, Carroll County, Ohio
→1982St. Mary's Rectory — Sandusky, Erie County, Ohio
→1979St. Mary's Roman Catholic Church — Portsmouth, Scioto County, Ohio
→1979St. Mary's Roman Catholic Church — Elyria, Lorain County, Ohio
→1982St. Mary's School — Sandusky, Erie County, Ohio
→1989St. Mary's School, Old — Marietta, Washington County, Ohio
→1985St. Michael Catholic Church — Mechanicsburg, Champaign County, Ohio
→1979St. Michael Catholic Church Complex — Fort Loramie, Shelby County, Ohio
→1974St. Michael the Archangel Catholic Church — Cleveland, Cuyahoga County, Ohio
→1979St. Nicholas Catholic Church and Rectory — Osgood, Darke County, Ohio
→1975St. Nicholas's Catholic Church — Zanesville, Muskingum County, Ohio
→1979St. Patrick Catholic Church and Rectory — St. Patrick, Shelby County, Ohio
→1978St. Patrick's Catholic Church — Cincinnati, Hamilton County, Ohio
→1972St. Patrick's Catholic Church — Toledo, Lucas County, Ohio
→1997St. Paul AME Church — Urbana, Champaign County, Ohio
→1974St. Paul Church Historic District — Cincinnati, Hamilton County, Ohio
→2023St. Paul Evangelical Lutheran Church and Parish Hall — Dayton, Montgomery County, Ohio
→1979St. Paul's Catholic Church and Rectory — Sharpsburg, Mercer County, Ohio
→1976St. Paul's Episcopal Church — Hicksville, Defiance County, Ohio
→1980St. Paul's Episcopal Church — Cleveland, Cuyahoga County, Ohio
→1977St. Paul's Episcopal Church — Fremont, Sandusky County, Ohio
→1982St. Paul's Episcopal Church — Medina, Medina County, Ohio
→1984St. Paul's Episcopal Church of East Cleveland — East Cleveland, Cuyahoga County, Ohio
→2006St. Paul's Reformed Church — Navarre, Stark County, Ohio
→1976St. Paul's Sunday School and Parish House — Akron, Summit County, Ohio
→1979St. Peter Catholic Church and Rectory — St. Peter, Mercer County, Ohio
→1990St. Peter Church — Canton, Stark County, Ohio
→1980St. Peter Evangelical Lutheran Church — Versailles, Darke County, Ohio
→1973St. Peter-In-Chains Cathedral — Cincinnati, Hamilton County, Ohio
→1979St. Peter's Evangelical Lutheran Church — Lancaster, Fairfield County, Ohio
→1989St. Peter's Lick Run Historic District — Cincinnati, Hamilton County, Ohio
→1979St. Peters Church — Mansfield, Richland County, Ohio
→1976St. Raphael Church — Springfield, Clark County, Ohio
→1979St. Remy Catholic Church — Russia, Shelby County, Ohio
→1982St. Rosa Church — Cincinnati, Hamilton County, Ohio
→1979St. Rose Catholic Church Complex — St. Rose, Mercer County, Ohio
→1979St. Sebastian Catholic Church and Rectory — St. Sebastian, Mercer County, Ohio
→1976St. Stanislaus Church — Cleveland, Cuyahoga County, Ohio
→1977St. Stephen Church — Cleveland, Cuyahoga County, Ohio
→1982St. Stephen Church and Rectory — Hamilton, Butler County, Ohio
→1974St. Theodosius Russian Orthodox Cathedral — Cleveland, Cuyahoga County, Ohio
→1980St. Thomas Aquinas Church — Zanesville, Muskingum County, Ohio
→1999St. Thomas Episcopal Church — Port Clinton, Ottawa County, Ohio
→1979St. Timothy's Protestant Episcopal Church — Massillon, Stark County, Ohio
→1979St. Wendelin Catholic Church, School, and Rectory — Wendelin, Mercer County, Ohio
→1982St.Stephens' AME Church — Sandusky, Erie County, Ohio
→1979Stagecoach Inn — Vermilion, Erie County, Ohio
→1978Stager-Beckwith House — Cleveland, Cuyahoga County, Ohio
→1997Stahl--Hoagland House — Navarre, Stark County, Ohio
→1980Staley Farm — Brandt, Miami County, Ohio
→2014Staley, Mr. and Mrs. Karl A., House — Madison, Lake County, Ohio
→1980Stambaugh Building — Youngstown, Mahoning County, Ohio
→1984Stambaugh, Henry H., Memorial Auditorium — Youngstown, Mahoning County, Ohio
→1975Stan Hywet Hall-Frank A. Seiberling House ★ NHL — Akron, Summit County, Ohio
→2013Stan Hywet Poultry Keepers Cottage — Akron, Summit County, Ohio
→1978Stanbery, Edwin, Office — Granville, Licking County, Ohio
→1975Standart-Simmons Hardware Company — Toledo, Lucas County, Ohio
→1982Stanford, George, Farm — Peninsula, Summit County, Ohio
→1982Stang, John, House — Sandusky, Erie County, Ohio
→2011Stanley Block — Cleveland, Cuyahoga County, Ohio
→1980Stanton Farm — Springboro, Warren County, Ohio
→1975Stark County Courthouse and Annex — Canton, Stark County, Ohio
→1978Starr-Truscott House — Birmingham, Erie County, Ohio
→1979Starr, Horace C., House and Carriage Barns — Elyria, Lorain County, Ohio
→1986State Theater — Youngstown, Mahoning County, Ohio
→1979Station Road Bridge — Brecksville, Cuyahoga County, Ohio
→1979Steamboat Hotel — Vermilion, Erie County, Ohio
→1986Stearns, Edward R., House — Wyoming, Hamilton County, Ohio
→1981Stearns, Lyman, Farm — Parma, Cuyahoga County, Ohio
→1986Stearns, William, House — Wyoming, Hamilton County, Ohio
→1996Stebbens Farm — Brecksville, Cuyahoga County, Ohio
→2020Stedman-Shafer Grocery Warehouse Building — Athens, Athens County, Ohio
→2023Steele's Hill-Grafton Hill Historic District — Dayton, Montgomery County, Ohio
→1987Steindam House — Portsmouth, Scioto County, Ohio
→1983Stengel, John S., House — Dayton, Montgomery County, Ohio
→1986Steubenville Commercial Historic District — Steubenville, Jefferson County, Ohio
→1995Steubenville Pottery Company Buildings — Steubenville, Jefferson County, Ohio
→1982Steubenville YMCA Building — Steubenville, Jefferson County, Ohio
→2007Stevenson, Joshua, House — Canal Winchester, Franklin County, Ohio
→1983Stewart Towers — Mansfield, Richland County, Ohio
→1992Stewart--Hanson Farm — Stow, Summit County, Ohio
→2018Stewart, Harry Bartlett, Property — Hartville, Stark County, Ohio
→1979Stites House — Cincinnati, Hamilton County, Ohio
→2001Stivers High School — Dayton, Montgomery County, Ohio
→1985Stockbridge Apartment Building — Cleveland, Cuyahoga County, Ohio
→1994Stoddart Block — Columbus, Franklin County, Ohio
→1982Stoffel, Henry, Blacksmith Shop — Sandusky, Erie County, Ohio
→1983Stokes, Benjamin A., House — Lebanon, Warren County, Ohio
→1982Stoll, Adam J., House — Sandusky, Erie County, Ohio
→2010Stone House, The — Berlin Heights, Erie County, Ohio
→1978Stone, Capt. Jonathan, House — Belpre, Washington County, Ohio
→1978Stone, Valerius C., House — Strongsville, Cuyahoga County, Ohio
→1982Stone's Block — Sandusky, Erie County, Ohio
→1975Stonehurst — Ripley, Brown County, Ohio
→1974Stonelick Covered Bridge — Perintown, Clermont County, Ohio
→1975Stoneman, Joseph, House — Chagrin Falls, Cuyahoga County, Ohio
→1983Stormont, David, House — New Concord, Muskingum County, Ohio
→1973Story Mound State Memorial — Chillicothe, Ross County, Ohio
→1970Stowe, Harriet Beecher, House — Cincinnati, Hamilton County, Ohio
→1991Stratford Methodist Episcopal Church — Delaware, Delaware County, Ohio
→1973Street, John, House — Salem, Columbiana County, Ohio
→1987Streich Apartments — Portsmouth, Scioto County, Ohio
→1974Stringer Stone House — Rayland, Jefferson County, Ohio
→2023Strong, Jacob, House — Shaker Heights, Cuyahoga County, Ohio
→1980Strong, John Stoughton, House — Strongsville, Cuyahoga County, Ohio
→2008Strongsville Town Hall — Strongsville, Cuyahoga County, Ohio
→1986Strouss--Hirschberg Company — Youngstown, Mahoning County, Ohio
→1989Stryker Depot — Stryker, Williams County, Ohio
→1983Sts. Peter & Paul Church and Rectory — Sandusky, Erie County, Ohio
→1978Stuart's Opera House — Nelsonville, Athens County, Ohio
→1978Studabaker-Scott House and Beehive School — Greenville, Darke County, Ohio
→1975Stump, John, House And Mill — Germantown, Montgomery County, Ohio
→1979Stumpy Basin — Peninsula, Summit County, Ohio
→1983Sturges, Susan, House — Mansfield, Richland County, Ohio
→1985Stuyvesant Hall — Delaware, Delaware County, Ohio
→2015Stuyvesant Motor Company Building — Cleveland, Cuyahoga County, Ohio
→1971Succesful Sales — Toledo, Lucas County, Ohio
→1973Sullivant, Lucas, Building — Columbus, Franklin County, Ohio
→1974Summit County Courthouse and Annex — Akron, Summit County, Ohio
→2020Summit Street Young Women's Christian Association (YWCA) — Dayton, Montgomery County, Ohio
→1975Sunbury Tavern — Sunbury, Delaware County, Ohio
→1975Sunbury Town Hall — Sunbury, Delaware County, Ohio
→1978Sunday Creek Coal Company Mine No. 6 — East Millfield, Athens County, Ohio
→2006Sunny Knolls--Pape, Gordon E., House — Inidan Hill, Hamilton County, Ohio
→2007Superior Avenue Historic District — Cleveland, Cuyahoga County, Ohio
→1978Superior Avenue Viaduct — Cleveland, Cuyahoga County, Ohio
→1977Sutton House — Decatur, Brown County, Ohio
→1976Swartz Covered Bridge — Wyandot, Wyandot County, Ohio
→1983Swetland House — London, Madison County, Ohio
→1974Sycamore School — Sandusky, Erie County, Ohio
→1982Sycamore-13th Street Grouping — Cincinnati, Hamilton County, Ohio
→1980Symmes Mission Chapel — Fairfield, Butler County, Ohio
→1973Taft Museum ★ NHL — Cincinnati, Hamilton County, Ohio
→1980Talcott, Joseph, House — Madison, Lake County, Ohio
→1971Tallmadge Town Square Historic District — Tallmadge, Summit County, Ohio
→1976Tallmadge-Mithoff House — Lancaster, Fairfield County, Ohio
→1984Tambling, Lucius T., House — Novelty, Geauga County, Ohio
→1986Tangeman, John, House — Wyoming, Hamilton County, Ohio
→1979Tanglewood — Chillicothe, Ross County, Ohio
→1979Tannehill, Capt. James Boggs, House — Zanesville, Muskingum County, Ohio
→1979Tanner, William C., House — Zanesville, Muskingum County, Ohio
→1983Tappan House — Mansfield, Richland County, Ohio
→1979Tappan, Judge Abraham, House — Unionville, Lake County, Ohio
→1982Tavener-Sears Tavern — Mount Sterling, Muskingum County, Ohio
→1984Tavern Club — Cleveland, Cuyahoga County, Ohio
→2020Tawawa Chimney Corner — Wilberforce, Greene County, Ohio
→1986Taylor Mansion--Lakehurst — Bratenahl, Cuyahoga County, Ohio
→1982Taylor-Frohman House — Sandusky, Erie County, Ohio
→2008Taylor, Colonel Joseph, House — Cambridge, Guernsey County, Ohio
→1977Taylorsville Canal Inn — Dayton, Montgomery County, Ohio
→2000Tecumseh Building — Springfield, Clark County, Ohio
→2000Teegarden--Centennial Covered Bridge — Salem, Columbiana County, Ohio
→1979Telephone Building, Old — Fredericktown, Knox County, Ohio
→1974Telling, William E., House — South Euclid, Cuyahoga County, Ohio
→2008Temperance Row Historic District — Westerville, Franklin County, Ohio
→1984Templar-Farrell Motor Sales Building — Cleveland, Cuyahoga County, Ohio
→2021Temple and Masonic Block Buildings — Caledonia, Marion County, Ohio
→1984Temple on the Heights — Cleveland Heights, Cuyahoga County, Ohio
→1974Temple, The — Cleveland, Cuyahoga County, Ohio
→2013Templin--Bradley Company — Cleveland, Cuyahoga County, Ohio
→2017Terrace Plaza Hotel — Cincinatti, Hamilton County, Ohio
→2020The Broer-Freeman Building — Toledo, Lucas County, Ohio
→2020The Eleanor Rainey Institute building — Cleveland, Cuyahoga County, Ohio
→1992The Ridge — Manchester, Adams County, Ohio
→2015Theresa Building — Columbus, Franklin County, Ohio
→1990Third Avenue and North High Historic District — Columbus, Franklin County, Ohio
→1987Third Church of Christ Scientist — Cleveland, Cuyahoga County, Ohio
→1982Third National Bank — Sandusky, Erie County, Ohio
→1980Third Presbyterian Church — Springfield, Clark County, Ohio
→1983Third Street Bridge — Canton, Stark County, Ohio
→2001Thomas Manufacturing Company Warehouse — Springfield, Clark County, Ohio
→1977Thomas Select School — Shandon, Butler County, Ohio
→1976Thompson Farm — Georgetown, Brown County, Ohio
→1979Thompson-Builder House — Dublin P.O., Franklin County, Ohio
→1978Thompson-Bullock House — Georgetown, Brown County, Ohio
→1971Thompson, Cassius Clark, House — East Liverpool, Columbiana County, Ohio
→1980Thompson, Enoch, House — Mount Vernon, Knox County, Ohio
→1979Thomson, Peter G., House — Cincinnati, Hamilton County, Ohio
→1976Thornton-Guise Kitchen And House — Munroe Falls, Summit County, Ohio
→1979Thorp, Manville, Residence — Bath, Summit County, Ohio
→1978Thorp, W. A., House — Mayfield Heights, Cuyahoga County, Ohio
→1989Thrush, Morgan, Farm Complex — Canal Winchester, Franklin County, Ohio
→1975Thumann Log House — St. Martin, Brown County, Ohio
→1979Thurber, James, House — Columbus, Franklin County, Ohio
→1975Thurston Building — Grand Rapids, Wood County, Ohio
→1982Tiedemann, Hannes, House — Cleveland, Cuyahoga County, Ohio
→1980Tiffin Agricultural Works — Tiffin, Seneca County, Ohio
→1980Tiffin Art Metal Company — Tiffin, Seneca County, Ohio
→1980Tiffin Waterworks — Tiffin, Seneca County, Ohio
→1985Tilden, Daniel, House — Peninsula, Summit County, Ohio
→1989Times Building--Lodge Hall — Canal Winchester, Franklin County, Ohio
→1983Times-Star Building — Cincinnati, Hamilton County, Ohio
→2018Timken Vocational High School — Canton, Stark County, Ohio
→1978Timken, Henry H., Estate Barn — Canton, Stark County, Ohio
→1979Tinkers Creek Aqueduct — Valley View, Cuyahoga County, Ohio
→2017Tinnerman Steel Range Company — Cleveland, Cuyahoga County, Ohio
→1976Tod Homestead Cemetery Gate — Youngstown, Mahoning County, Ohio
→1980Toledo and Ohio Central Depot — Bucyrus, Crawford County, Ohio
→1973Toledo and Ohio Central Railroad Station — Columbus, Franklin County, Ohio
→1978Toledo Club — Toledo, Lucas County, Ohio
→1983Toledo Harbor Light — Toledo, Lucas County, Ohio
→1989Toledo Olde Towne Historic District — Toledo, Lucas County, Ohio
→2003Toledo Traction Company Power Station — Toledo, Lucas County, Ohio
→1976Toledo Yacht Club — Toledo, Lucas County, Ohio
→1991Tonkens, Gerald B. and Beverley, House — Cincinnati, Hamilton County, Ohio
→2004Toronto World War I Momument — Toronto, Jefferson County, Ohio
→2001Tosheff's Restaurant and Hotel — Columbus, Franklin County, Ohio
→2014Tower East — Shaker Heights, Cuyahoga County, Ohio
→1971Towers Hall, Otterbein College — Westerville, Franklin County, Ohio
→1980Town Center District — Madison, Lake County, Ohio
→1975Town Hall — Grand Rapids, Wood County, Ohio
→2009Town Pump of East Sparta, The — East Sparta, Stark County, Ohio
→1987Townes, Clayton, House — Cleveland, Cuyahoga County, Ohio
→1982Townsend, William T., House — Sandusky, Erie County, Ohio
→2017Traction Company Building — Cincinnati, Hamilton County, Ohio
→1979Trailsend — Kettering, Montgomery County, Ohio
→1986Travelers Hotel — East Liverpool, Columbiana County, Ohio
→1979Travellers' Rest Inn — Greenfield, Highland County, Ohio
→1979Traxler Mansion — Dayton, Montgomery County, Ohio
→1976Treber Inn — West Union, Adams County, Ohio
→1973Tremaine-Gallagher Residence — Cleveland Heights, Cuyahoga County, Ohio
→1994Tremont Historic District — Cleveland, Cuyahoga County, Ohio
→2006Tremont House — Bellevue, Huron County, Ohio
→1982Trimble, James S., House — Mount Gilead, Morrow County, Ohio
→1973Trinity Cathedral — Cleveland, Cuyahoga County, Ohio
→1984Trinity Cathedral Church Home — Cleveland, Cuyahoga County, Ohio
→1983Trinity Episcopal Church — Toledo, Lucas County, Ohio
→1976Trinity Episcopal Church — Columbus, Franklin County, Ohio
→1976Trinity Episcopal Church — McArthur, Vinton County, Ohio
→1985Trinity German Evangelical Lutheran Church — Columbus, Franklin County, Ohio
→1985Trinity Lutheran Church — Canton, Stark County, Ohio
→1988Tripp--Bauer Building — South Webster, Scioto County, Ohio
→1982Trop Farm — Hillsboro, Highland County, Ohio
→1981Trotwood Railroad Station and Depot — Trotwood, Montgomery County, Ohio
→1975Troy Public Square — Troy, Miami County, Ohio
→1974Trumbull County Courthouse — Warren, Trumbull County, Ohio
→1999Tubbs--Sourwine House — Plymouth, Richland County, Ohio
→1990Tuscarawas Avenue--Alexander Square Commercial Historic District — Barberton, Summit County, Ohio
→1973Tuscarawas County Courthouse — New Philadelphia, Tuscarawas County, Ohio
→1976Tuttle House — Fredericktown, Knox County, Ohio
→1976Twelve Mile House — Sharonville, Hamilton County, Ohio
→1993Twentieth Century Theatre — Cincinnati, Hamilton County, Ohio
→1978Twin Arch Stone Culvert — Troy, Miami County, Ohio
→1975Twin Oaks — Wyoming, Hamilton County, Ohio
→1974Twinsburg Congregational Church — Twinsburg, Summit County, Ohio
→1976Twinsburg Institute — Twinsburg, Summit County, Ohio
→1975Tytus, John B., House ★ NHL — Middletown, Butler County, Ohio
→1982U.S. Coast Guard Building — Sandusky, Erie County, Ohio
→1998U.S. Grant Birthplace and Grant Commemorative Sites Historic District — Point Pleasant, Clermont County, Ohio
→1982U.S. Post Office — Lima, Allen County, Ohio
→1982U.S. Post Office — Lorain, Lorain County, Ohio
→1979U.S. Post Office — Chesterville, Morrow County, Ohio
→1979U.S. Post Office — Bowling Green, Wood County, Ohio
→1979U.S. Post Office — Elyria, Lorain County, Ohio
→1982U.S. Post Office — Sandusky, Erie County, Ohio
→1973U.S. Post Office and Courthouse — Columbus, Franklin County, Ohio
→1979Ulyatt, Abraham, House — Valley View, Cuyahoga County, Ohio
→1979Umsted Farm — Tiffin, Seneca County, Ohio
→2006Underwood Farms Rural Historic District — Chester Township, Clinton County, Ohio
→1982Underwriters Salvage Corps — Cincinnati, Hamilton County, Ohio
→1978Unger, George B., House — West Alexandria, Preble County, Ohio
→2002Union Baptist Cemetery — Cincinnati, Hamilton County, Ohio
→1982Union Block — Lima, Allen County, Ohio
→1987Union Cemetery--Beatty Park — Steubenville, Jefferson County, Ohio
→1982Union Church — Kipton, Lorain County, Ohio
→1974Union Club — Cleveland, Cuyahoga County, Ohio
→1989Union Steel Screw Office Building — Cleveland, Cuyahoga County, Ohio
→1976Union Terminal Group — Cleveland, Cuyahoga County, Ohio
→2008Union Trust Building — Cincinnati, Hamilton County, Ohio
→1979Union, Old, School Building — Vermilion, Erie County, Ohio
→1978Unionville District School — Unionville, Lake County, Ohio
→1973Unionville Tavern — Unionville, Lake County, Ohio
→1994Uniopolis Town Hall — Uniopolis, Auglaize County, Ohio
→2006Unit III, Dayton Project — Dayton, Montgomery County, Ohio
→1978United Brethren in Christ — Cincinnati, Hamilton County, Ohio
→1993United Brethren Publishing House — Dayton, Montgomery County, Ohio
→1979United Church of Huntington — Wellington, Lorain County, Ohio
→2022United Colored American Cemetery — Cincinnati, Hamilton County, Ohio
→1975United Methodist Church — Mariemont, Hamilton County, Ohio
→1984United Methodist Church — Millersburg, Holmes County, Ohio
→1985United Methodist Church — Mechanicsburg, Champaign County, Ohio
→1984United Motor Service Building — Cleveland, Cuyahoga County, Ohio
→2015United States Carriage Company — Columbus, Franklin County, Ohio
→2013United States Courthouse and Custom House — Toledo, Lucas County, Ohio
→2019United States Post Office — Medina, Medina County, Ohio
→2015United States Post Office and Court House — Cincinnati, Hamilton County, Ohio
→2012United States Post Office and Courthouse — Columbus, Franklin County, Ohio
→1983Universal Terminal Company Dock and Warehouse — Cleveland, Cuyahoga County, Ohio
→1970Universalist Church Historic District — Montgomery, Hamilton County, Ohio
→1978Universalist Church Of Westfield Center — Westfield Center, Medina County, Ohio
→1985University Hall-Gray's Chapel — Delaware, Delaware County, Ohio
→1973University Hall, Cleveland State University — Cleveland, Cuyahoga County, Ohio
→1970University, Hayes and Orton Halls — Columbus, Franklin County, Ohio
→1974Unzicker-Cook House — Oxford, Butler County, Ohio
→1979Upham-Wright House — Newark, Licking County, Ohio
→1978Upland Farm — Newark, Licking County, Ohio
→1985Upper Arlington Historic District — Upper Arlington, Franklin County, Ohio
→2006Upper Downtown Canton Historic District — Canton, Stark County, Ohio
→1983Upson House — Mansfield, Richland County, Ohio
→1974Upson-Walton Company Building — Cleveland, Cuyahoga County, Ohio
→1992Upton, Harriet Taylor, House ★ NHL — Warren, Trumbull County, Ohio
→1980Urbana College Historic Buildings — Urbana, Champaign County, Ohio
→1984Urbana Monument Square Historic District — Urbana, Champaign County, Ohio
→1976Ursuline Center — Fayetteville, Brown County, Ohio
→1988US Post Office and Federal Building--Zanesville — Zanesville, Muskingum County, Ohio
→1986USS COD (submarine) ★ NHL — Cleveland, Cuyahoga County, Ohio
→1987Valentine Theater Building — Toledo, Lucas County, Ohio
→1982Valley Dale Ballroom — Columbus, Franklin County, Ohio
→1985Valley Railway Historic District — Independence to Akron, Cuyahoga County, Ohio
→1984Van Deman, Henry, House — Delaware, Delaware County, Ohio
→1987Van Horn Building — Carrollton, Carroll County, Ohio
→2004Van Rooy Coffee Company Building — Cleveland, Cuyahoga County, Ohio
→1982Van Wert Bandstand — Van Wert, Van Wert County, Ohio
→1974Van Wert County Courthouse — Van Wert, Van Wert County, Ohio
→1979Vanmeter Church Street House — Chillicothe, Ross County, Ohio
→1975Vanmeter Stone House and Outbuildings — Piketon, Pike County, Ohio
→1982Variety Store Building and Theatre — Cleveland, Cuyahoga County, Ohio
→2006Vaugh--Stacy--Evans Farm Historic District — Lowell, Washington County, Ohio
→1975Vaughan, John, House — Shandon, Butler County, Ohio
→1980Vaughn, Daniel, Homestead — Lake Milton, Mahoning County, Ohio
→1993Vaughn, Richard, Farm — Brecksville, Cuyahoga County, Ohio
→1990Venice Building — Cleveland, Cuyahoga County, Ohio
→1978Vermilion Institute — Hayesville, Ashland County, Ohio
→1974Vermilion Town Hall — Vermilion, Erie County, Ohio
→2008Verona Apartments — Cincinnati, Hamilton County, Ohio
→1981Versailles Town Hall and Wayne Township House — Versailles, Darke County, Ohio
→1990Vesuvius Furnace — Ironton, Lawrence County, Ohio
→2011Vesuvius Furnace--Stone Bridge (Boundary Decrease) — Ironton, Lawrence County, Ohio
→1994Viall Lodge — Akron, Summit County, Ohio
→1982Vicary House — Canton, Stark County, Ohio
→1972Victory Theater Building — Dayton, Montgomery County, Ohio
→1986Village Historic District — Wyoming, Hamilton County, Ohio
→1985Village Hobby Shop — Mechanicsburg, Champaign County, Ohio
→1991Village of Addyston Historic District — Addyston, Hamilton County, Ohio
→2007Village of Mariemont ★ NHL — Mariemont, Hamilton County, Ohio
→1978Vistula Historic District — Toledo, Lucas County, Ohio
→2004Vitrolite Building — Cleveland, Cuyahoga County, Ohio
→2000Voegele Building — Mansfield, Richland County, Ohio
→2006Voice of America Bethany Relay Station — West Chester, Butler County, Ohio
→1982Von Schulenburg, Ernst, House — Sandusky, Erie County, Ohio
→2010Voris, Peter Jr., House — Bath Township, Summit County, Ohio
→1970W.P. SNYDER, JR. (steamboat) ★ NHL — Marietta, Washington County, Ohio
→1973Wade Memorial Chapel — Cleveland, Cuyahoga County, Ohio
→1982Wade Park District — Cleveland, Cuyahoga County, Ohio
→1979Wadsworth, Benjamin, House — Wellington, Lorain County, Ohio
→1975Wadsworth, Frederick, House — Edinburg, Portage County, Ohio
→1982Wadsworth, James, House — Sandusky, Erie County, Ohio
→1979Waernicke-Hille House And Store — Archer's Fork, Washington County, Ohio
→1980Wagner Brothers Bottling Works — Tiffin, Seneca County, Ohio
→1982Wagner Palace — Sandusky, Erie County, Ohio
→1973Waldschmidt-Camp Dennison District — Cincinnati, Hamilton County, Ohio
→1986Walhounding Canal Lock No. 9 — Warsaw, Coshocton County, Ohio
→2007Walke, Anthony, and Susan Cardinal, House — Chillicothe, Ross County, Ohio
→1984Walker and Weeks Office Building — Cleveland, Cuyahoga County, Ohio
→1982Walker, Cristopher C., House and Farm — New Madison, Darke County, Ohio
→1980Walker, William, Jr., House — Upper Sandusky, Wyandot County, Ohio
→1985Wallace Farm — Northfield Center, Summit County, Ohio
→1976Wallace, Charlton, House — Cincinnati, Hamilton County, Ohio
→1987Walling, Ansel T., House — Circleville, Pickaway County, Ohio
→1978Wallischeck Homestead — Fort Recovery, Mercer County, Ohio
→1980Walnut Hills United Presbyterian Church — Cincinnati, Hamilton County, Ohio
→1984Walnut Street School — Wooster, Wayne County, Ohio
→1979Walper, Capt. Henry, House — Vermilion, Erie County, Ohio
→1974Walters, Dr. Jefferson A., House — Dayton, Montgomery County, Ohio
→1989Wapakoneta Commercial Historic District — Wapakoneta, Auglaize County, Ohio
→1972War Of 1812 Battle Site — Mineyahta-on-the-Bay, Ottawa County, Ohio
→1987Ward House — Hudson, Summit County, Ohio
→1984Ward-Thomas House — Niles, Trumbull County, Ohio
→1974Ward, John Q. A., House — Urbana, Champaign County, Ohio
→1983Ward, W. S., House — Mansfield, Richland County, Ohio
→1978Warder Public Library — Springfield, Clark County, Ohio
→1978Warder, John Aston, House — North Bend, Hamilton County, Ohio
→1980Ware, Edwin L., House — Madison, Lake County, Ohio
→1977Waring House — Greenville, Darke County, Ohio
→2019Warner & Swasey Company Building — Cleveland, Cuyahoga County, Ohio
→1980Warner Theater — Youngstown, Mahoning County, Ohio
→1976Warnke Covered Bridge — Lewisburg, Preble County, Ohio
→1983Warren Commercial Historic District — Warren, Trumbull County, Ohio
→1973Warren Public Library — Warren, Trumbull County, Ohio
→1983Warren Tavern Complex — Delaware, Delaware County, Ohio
→1974Warren, Moses, House — Shaker Heights, Cuyahoga County, Ohio
→1994Warsaw Hotel — Warsaw, Coshocton County, Ohio
→1980Warszawa Neighborhood District — Cleveland, Cuyahoga County, Ohio
→2023Warther Family Home and Museum — Dover, Tuscarawas County, Ohio
→2002Warwick Interlocking Tower — Clinton, Summit County, Ohio
→1980Washburn, Rev. Ebenezer, House — Westerville, Franklin County, Ohio
→1987Washington Avenue Historic District — Elyria, Lorain County, Ohio
→2006Washington Cemetery Historic District — Washington Court House, Fayette County, Ohio
→1985Washington Court House Commercial Historic District — Washington Court House, Fayette County, Ohio
→1975Washington Heights School — Indian Hill, Hamilton County, Ohio
→2013Washington School — Washington Court House, Fayette County, Ohio
→1979Washington Terrace Apartments — Elyria, Lorain County, Ohio
→1979Washington Township School — Dublin, Franklin County, Ohio
→1979Washington Township Voting Hall — Amlin, Franklin County, Ohio
→1975Water Street Commercial Buildings — Sandusky, Erie County, Ohio
→2001Waterman Service Building — Cleveland, Cuyahoga County, Ohio
→1980Waterstreet Historic District — Xenia, Greene County, Ohio
→1986Watertown Historic District — Watertown, Washington County, Ohio
→1976Waterville Commercial District — Waterville, Lucas County, Ohio
→1974Watkins House — Centerville, Montgomery County, Ohio
→1985Watt-Groce-Fickhardt House — Circleville, Pickaway County, Ohio
→1992Watterson School — Cleveland, Cuyahoga County, Ohio
→1978Waverly Canal Historic District — Waverly, Pike County, Ohio
→1973Wayne County Courthouse District — Wooster, Wayne County, Ohio
→1999Waynesville Engine House and Lockup — Waynesville, Warren County, Ohio
→1979Waynesville Greek Revival Houses — Waynesville, Warren County, Ohio
→2002Waynesville Main Street Historic District — Waynesville, Warren County, Ohio
→1979Webber, A. R., House — Elyria, Lorain County, Ohio
→1980Webster Manufacturing — Tiffin, Seneca County, Ohio
→1987Weddle, Callahill and Priscilla, House — Troy, Miami County, Ohio
→1980Weethee Historic District — Millfield, Athens County, Ohio
→1988Weizer Building — Cleveland, Cuyahoga County, Ohio
→2002Weizer Building — Cleveland, Cuyahoga County, Ohio
→1974Wellington Center Historic District — Wellington, Lorain County, Ohio
→1979Wellington Historic District — Wellington, Lorain County, Ohio
→1986Wells Building — Youngstown, Mahoning County, Ohio
→1993Wells--Clark--Strouss House — Youngstown, Trumbull County, Ohio
→2009Wells, Harvey, House — Wellston, Jackson County, Ohio
→1984Welsbach Building — Columbus, Franklin County, Ohio
→1986Welsh Congregational Church — Youngstown, Mahoning County, Ohio
→1980Welsh Presbyterian Church — Columbus, Franklin County, Ohio
→1979Welton, Allen, House — Peninsula, Summit County, Ohio
→1976Werner Company Building — Akron, Summit County, Ohio
→1987Werner Inn — East Canton, Stark County, Ohio
→2005Werner, Edward P., House — Akron, Summit County, Ohio
→1979Wesley Chapel — Hilliard, Franklin County, Ohio
→1979Wesley Chapel — Hopetown, Ross County, Ohio
→1994Wesley Temple AME Church — Akron, Summit County, Ohio
→2013West 25th Street--Detroit Avenue Historic District — Cleveland, Cuyahoga County, Ohio
→2006West Alexandria Depot — West Alexandria, Preble County, Ohio
→1984West Baptist Church — Lebanon, Warren County, Ohio
→1987West End Elementary School — Carey, Wyandot County, Ohio
→1985West Fifth Street Bridge — Ashtabula, Ashtabula County, Ohio
→1976West Fourth Street Historic District — Cincinnati, Hamilton County, Ohio
→1979West Fourth Street Historic District (Amendment) — Cincinnati, Hamilton County, Ohio
→2007West Fourth Street Historic District (Boundary Increase) — Cincinnati, Hamilton County, Ohio
→2015West Fourth Street Historic District (Boundary Increase) — Cincinnati, Hamilton County, Ohio
→1979West House — Wellington, Lorain County, Ohio
→1974West Main Street District — Norwalk, Huron County, Ohio
→1977West Main Street District — Kent, Portage County, Ohio
→1982West Market School — Sandusky, Erie County, Ohio
→2004West Market Street Boulevard Historic District — Lima, Allen County, Ohio
→1988West Mound Street Historic District — Canal Winchester, Franklin County, Ohio
→2002West Orange Road--Thomas Bridge — Powell, Delaware County, Ohio
→1980West School — Crooksville, Perry County, Ohio
→1973West Side Market — Cleveland, Cuyahoga County, Ohio
→1983West Side Planing Mill (rear) — Newark, Licking County, Ohio
→1983West Sister Island Light — Toledo, Lucas County, Ohio
→2001West Technical High School — Cleveland, Cuyahoga County, Ohio
→1989West Third Street Historic District — Dayton, Montgomery County, Ohio
→1976West Union Presbyterian Church — West Union, Adams County, Ohio
→1978West Union School — Norwich, Muskingum County, Ohio
→1982West View — Zanesville, Muskingum County, Ohio
→1988Westbrock Funeral Home — Dayton, Montgomery County, Ohio
→1974Westcott House — Springfield, Clark County, Ohio
→2013Westerly Apartments — Lakewood, Cuyahoga County, Ohio
→1979Western Female Seminary — Oxford, Butler County, Ohio
→1975Western Reserve Academy — Hudson, Summit County, Ohio
→1973Western Reserve Building — Cleveland, Cuyahoga County, Ohio
→1974Westervelt Hall — Oberlin, Lorain County, Ohio
→1975Westerville High School-Vine Street School — Westerville, Franklin County, Ohio
→1983Westlake Hotel — Rocky River, Cuyahoga County, Ohio
→2001Westminster Church — Columbus, Franklin County, Ohio
→1984Westmont Building — Akron, Summit County, Ohio
→1986Westmoreland Historic District — Toledo, Lucas County, Ohio
→2002Weston, John Henry, House — Cincinnati, Hamilton County, Ohio
→1974Westwood Town Center Historic District — Cincinnati, Hamilton County, Ohio
→1980Westwood United Methodist Church — Cincinnati, Hamilton County, Ohio
→2014Weustoff and Getz Company — Dayton, Montgomery County, Ohio
→1973Whallon, James, House — Greenhills, Hamilton County, Ohio
→1979Wheatley, Phillis, Association — Cleveland, Cuyahoga County, Ohio
→1978Wheeler, John, House — Berea, Cuyahoga County, Ohio
→2013Wheeling and Lake Erie Railroad Depot — Lodi, Medina County, Ohio
→1992Wheeling and Lake Erie RR Minerva Station — Minerva, Carroll County, Ohio
→1987Wheeling Avenue Historic District — Cambridge, Guernsey County, Ohio
→1976Whitby Mansion — Sidney, Shelby County, Ohio
→1983White Bridge — Poland Village, Mahoning County, Ohio
→2000White Chewing Gum Company Building — Cleveland, Cuyahoga County, Ohio
→1973White, Henry P., House — Cleveland, Cuyahoga County, Ohio
→1976White, Samuel M., House — Sandusky, Erie County, Ohio
→1976White, Walter C., Estate — Mayfield Heights, Geauga County, Ohio
→1982White's-Vale Mill — Athens, Athens County, Ohio
→1980Whitehall Farm — Yellow Springs, Greene County, Ohio
→1973Whiteman, Benjamin, House — Clifton, Greene County, Ohio
→1974Whitewater Shaker Settlement — New Haven, Hamilton County, Ohio
→1979Whitmer, Frieda, House — Amlin, Franklin County, Ohio
→1979Whitmer, Soloman, House — Thornville, Perry County, Ohio
→1974Whitney, George W., House — Berea, Cuyahoga County, Ohio
→1984Whitney, Newel K., Store — Kirtland, Lake County, Ohio
→2019WHK Studio One — Cleveland, Cuyahoga County, Ohio
→1982Wichman's Grocery — Sandusky, Erie County, Ohio
→1974Wick Avenue Historic District — Youngstown, Mahoning County, Ohio
→1980Wick Avenue Historic District (Boundary Decrease) — Youngstown, Mahoning County, Ohio
→1980Wick Building — Youngstown, Mahoning County, Ohio
→1990Wick Park Historic District — Youngstown, Mahoning County, Ohio
→2001Wick Park Historic District (Boundary Increase) — Youngstown, Mahoning County, Ohio
→1979Wickerham Inn — Peebles, Adams County, Ohio
→2018Wickersham House — Jamestown, Greene County, Ohio
→1979Wilber, J. B., House — Wellington, Lorain County, Ohio
→1973Wilcox-Mills House — Marietta, Washington County, Ohio
→1979Wilcox, Jacob, Farm — Amlin, Franklin County, Ohio
→1979Wilcox, James, House — Amlin, Franklin County, Ohio
→1981Wilder-Swaim House — Montgomery, Hamilton County, Ohio
→1980Wiles, Perry, Grocery Company — Zanesville, Muskingum County, Ohio
→1993Willdred Flats — Sandusky, Erie County, Ohio
→1966William Howard Taft National Historic Site ★ NHL — Cincinnati, Hamilton County, Ohio
→2001William Tricker Inc. Historic District — Independence, Cuyahoga County, Ohio
→1973Williams County Courthouse — Bryan, Williams County, Ohio
→2002Williams House — Williamsburg, Clermont County, Ohio
→1979Williams, Abner, Log House — Lashley, Noble County, Ohio
→1979Williams, Dr. Issac Elmer, House And Office — St. Marys, Auglaize County, Ohio
→1979Williams, Elias, House — Newark, Licking County, Ohio
→1978Williams, Henry Harrison, House — Avon, Lorain County, Ohio
→1976Williams, Judge Henry, House — Troy, Miami County, Ohio
→1977Williams, W. L., House — Cincinnati, Hamilton County, Ohio
→1971Williamson Mound State Memorial — Cedarville, Greene County, Ohio
→1979Williard Hall — Tiffin, Seneca County, Ohio
→1972Willow Lane Farm — Lancaster, Fairfield County, Ohio
→1982Wilmington Commercial Historic District — Wilmington, Clinton County, Ohio
→1976Wilmot United Brethren Church — Wilmot, Stark County, Ohio
→1979Wilson Feed Mill — Valley View, Cuyahoga County, Ohio
→2010Wilson--Falkner--Baldauf House — Avon, Lorain County, Ohio
→1976Wilson-Gibson House — Cincinnati, Hamilton County, Ohio
→1980Wilson-Lenox House — Sidney, Shelby County, Ohio
→1980Wilson, George D., House — Madison, Lake County, Ohio
→1977Wilson, John T., Homestead — Seaman, Adams County, Ohio
→2000Wilson, Samuel and Sally, House — Cincinnati, Hamilton County, Ohio
→1973Wilson, Valentine, House — Somerford, Madison County, Ohio
→1980Wilson's Mills Settlement District — Gates Mills, Cuyahoga County, Ohio
→1976Winans, Dr. J. C., House — Madison, Lake County, Ohio
→2019Winders Motor Sales Company — Columbus, Franklin County, Ohio
→1975Windsor Corners District — Windsor, Ashtabula County, Ohio
→1975Windsor Mills Christ Church Episcopal — Windsor Mills, Ashtabula County, Ohio
→2015Windsor Public School — Cincinnati, Hamilton County, Ohio
→1977Winter, William, Stone House — Mt. Olive, Clermont County, Ohio
→1988Winterringer Building and House — Hilliard, Franklin County, Ohio
→1980Winton Place Methodist Episcopal Church — Cincinnati, Hamilton County, Ohio
→2010Wintzer, Charles, Building — Wapakoneta, Auglaize County, Ohio
→2019Wise, Isaac M., Temple-Center — Cincinnati, Hamilton County, Ohio
→1980Wise, Peter, House — Berlin, Holmes County, Ohio
→1973Wiswell Road Covered Bridge — Windsor Mills, Ashtabula County, Ohio
→1983Withrow High School — Cincinnati, Hamilton County, Ohio
→2014Wittenberg University Historic District — Springfield, Clark County, Ohio
→1988Wolcott House — Northfield, Summit County, Ohio
→1991Wolcott, Benajah, House — Lakeside--Marblehead, Ottawa County, Ohio
→1980Wolfe, Mary A., House — Cincinnati, Hamilton County, Ohio
→1976Women's Christian Association — Dayton, Montgomery County, Ohio
→1979Wood Commercial Building — Chesterville, Morrow County, Ohio
→1974Wood County Courthouse And Jail — Bowling Green, Wood County, Ohio
→1979Wood County Home and Infirmary — Bowling Green, Wood County, Ohio
→1987Wood Old Homestead — Rio Grande, Gallia County, Ohio
→1979Woodland Avenue and West Side Railroad Powerhouse — Cleveland, Cuyahoga County, Ohio
→1986Woodland Cemetery — Cleveland, Cuyahoga County, Ohio
→2011Woodland Cemetery Association of Dayton Historic District — Dayton, Montgomery County, Ohio
→1978Woodland Cemetery Gateway, Chapel And Office — Dayton, Montgomery County, Ohio
→1998Woodlawn Cemetery — Toledo, Lucas County, Ohio
→1986Woodlawn Farm — Washington Courthouse, Fayette County, Ohio
→1982Woodrow, William, House — Champion, Trumbull County, Ohio
→1986Woodruff, Charles, House — Wyoming, Hamilton County, Ohio
→1982Woodruff, William H., House — Logan, Hocking County, Ohio
→1982Woods, Tet, Building — West Union, Adams County, Ohio
→1975Woodward Opera House — Mount Vernon, Knox County, Ohio
→1979Wooster Block — Elyria, Lorain County, Ohio
→1978Wooster Post Office (Wooster Board of Education) — Wooster, Wayne County, Ohio
→1973Worth, Gorham A., House — Cincinnati, Hamilton County, Ohio
→2010Worthington Historic District — Worthington, Franklin County, Ohio
→1980Worthington Historical Society Museum — Worthington, Franklin County, Ohio
→1973Worthington Manufacturing Company Boardinghouse — Worthington, Franklin County, Ohio
→1980Worthington Public Square — Worthington, Franklin County, Ohio
→1980Worthington United Presbyterian Church — Worthington, Franklin County, Ohio
→1986Wright Cycle Company--Wright and Wright Printing Offices ★ NHL — Dayton, Montgomery County, Ohio
→1990Wright Flyer III ★ NHL — Dayton, Montgomery County, Ohio
→2013Wright Library — Dayton, Montgomery County, Ohio
→1982Wright, Daniel Thew, House — Cincinnati, Hamilton County, Ohio
→1979Wright, Dr. Aaron, House — Springboro, Warren County, Ohio
→1978Wright, Dr. John A., House — Toledo, Lucas County, Ohio
→1980Wright, Horace, House — Worthington, Franklin County, Ohio
→1979Wright, J.E. Farm — Dublin, Franklin County, Ohio
→1974Wright, John, Mansion — Bellevue, Huron County, Ohio
→1979Wright, Lyman, Building — Fredericktown, Knox County, Ohio
→1980Wright, Potter, House — Worthington, Franklin County, Ohio
→1973Wyandot County Courthouse and Jail — Upper Sandusky, Wyandot County, Ohio
→1976Wyandot Mission Church — Upper Sandusky, Wyandot County, Ohio
→1972Wyandotte Building — Columbus, Franklin County, Ohio
→1980Wyoming Presbyterian Church — Wyoming, Hamilton County, Ohio
→2015Xenia Carnegie Library — Xenia, Greene County, Ohio
→1973Y Bridge — Zanesville, Muskingum County, Ohio
→1994Yager, John and Carrie, House — Mentor, Lake County, Ohio
→1985Yeager, John J., House — Perrysburg, Wood County, Ohio
→1982Yellow Springs Historic District — Yellow Springs, Greene County, Ohio
→1985YMCA — East Liverpool, Columbiana County, Ohio
→1996Yondota Historic District — Toledo, Lucas County, Ohio
→1984York Lodge No. 563 — Columbus, Franklin County, Ohio
→1978York United Methodist Church — Mallet Creek, Medina County, Ohio
→1993Yost Tavern — Montgomery, Hamilton County, Ohio
→1982Young Woman's Christian Association — Akron, Summit County, Ohio
→1982Young Women's Christian Association of Cincinnati — Cincinnati, Hamilton County, Ohio
→1980Young-Shaw House — Sarahsville, Noble County, Ohio
→1996Young, Benjamin and Mary, House — Mentor, Lake County, Ohio
→1979Young, Capt., House — Vermilion, Erie County, Ohio
→1974Young, Col. Charles, House ★ NHL — Wilberforce, Greene County, Ohio
→1976Young, Thomas F., House — Hiram, Portage County, Ohio
→1982Youngstown Sheet and Tube Company Housing — Campbell, Mahoning County, Ohio
→2017Yuster Building — Columbus, Franklin County, Ohio
→1986YWCA Building — Youngstown, Mahoning County, Ohio
→2023Zanesville YMCA — Zanesville, Muskingum County, Ohio
→1978Zanesville YWCA — Zanesville, Muskingum County, Ohio
→1989Zellers--Langel House — Canal Winchester, Franklin County, Ohio
→2021Zenas King Bowstring Bridge — Sidney, Shelby County, Ohio
→1985Zero Gravity Research Facility (B-2) ★ NHL — Cleveland, Cuyahoga County, Ohio
→2014Zettler Grocery and Hardware — Columbus, Franklin County, Ohio
→2018Zimmerly House — New Franklin, Summit County, Ohio
→1975Zimmerman, Ezekiel B., Octagon House — Marshallville, Wayne County, Ohio
→1974Zion Episcopal Church — Monroeville, Huron County, Ohio
→1982Zion Lutheran Church — Sandusky, Erie County, Ohio
→1984Zion Lutheran Church — Cleveland, Cuyahoga County, Ohio
→1984Zion Lutheran School — Cleveland, Cuyahoga County, Ohio
→2004Zion's Evangelical Lutheran Church — Obetz, Franklin County, Ohio
→1969Zoar Historic District — Zoar, Tuscarawas County, Ohio
→1975Zoar Historic District (Boundary Increase) — Village of Zoar along OH 212, Tuscarawas County, Ohio
→2013Zoar Historic District (Boundary Increase) — Zoar, Tuscarawas County, Ohio
→1997Zoarville Bridge — Zoarville, Tuscarawas County, Ohio
→2015Zollinger, S., Company Building — Piqua, Miami County, Ohio
→1996Zottman House — Portsmouth, Scioto County, Ohio
→2000Zweig Building — Bellaire, Belmont County, Ohio
→Explore the register
More historic places, by email
New National Register listings, mapped and explained. A short weekly email.