HISTORIC PLACES GUIDE

National Register of Historic Places

Assay Office

Assay Office is a historic place in Boise, Ada County, Idaho, listed on the United States National Register of Historic Places on October 15, 1966, and designated a National Historic Landmark. Its National Register reference number is 66000305.

Boise, Ada County, IdahoListed October 15, 1966NRIS #66000305★ National Historic Landmark
Photograph of Assay Office
Photo: Assay Office via Wikimedia Commons — see the file page for author and license. Image source
Noir atlas

Location 01

Assay Office

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About this place

What is Assay Office?

The Assay Office is a historic building at 210 Main Street in Boise, Idaho. It is significant for its role in the history of mining in Idaho, and was the first major federal government building in the Idaho Territory. During the first half of the 1860s, Idaho's gold production was the third highest in the nation. Due to the difficulty of transporting ores, which can be heavy, the long distance to the nearest U.S. Mint in San Francisco, there was great demand for an assaying office in Idaho that would be able to separate precious metals from impurities in them, helping to place a value on ores that went through the office.

Source: Wikipedia, text available under CC BY-SA 4.0.

The record

Listing details

Name
Assay Office
City
Boise
County
Ada County
State
Idaho
Listed on the National Register
October 15, 1966
NRIS reference number
66000305
Resource type
building
National Historic Landmark
Yes
Coordinates
43.61286, -116.19655
When was Assay Office listed on the National Register?

Assay Office was added to the National Register of Historic Places on October 15, 1966.

Where is Assay Office located?

Assay Office is located in Boise, Ada County, Idaho at approximately 43.61286, -116.19655. See the map above.

Is Assay Office a National Historic Landmark?

Yes. Assay Office is designated a National Historic Landmark, the highest federal recognition for a historic place.

Nearby on the register

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