Montana - Area of significance: Commerce
| Acme Building |
| Adair, W. L., General Mercantile Historic District |
| Adams Hotel |
| Anaconda Commercial Historic District |
| Anderson Lumber Company |
| Andrus Hotel |
| Apartment Building at 116 Spruce Street |
| Armour Cold Storage |
| Arvon Block |
| Atlantic Hotel |
| Atlas Block |
| Baatz Block |
| Babcock Theatre Building |
| Bad Pass Trail |
| Baker Hotel |
| Baker, I. G., House |
| Barich Block |
| Barnett, R. T., and Company Building |
| Bearcreek Bank |
| Bell Street Bridge |
| Belmont Hotel |
| Belt Commercial Historic District |
| Bestwick's Market |
| Billings Historic District |
| Billings Old Town Historic District |
| Bitter Root Cooperative Creamery |
| Blewett, John, House |
| Bluebird Building |
| Bookman, J. A., General Store |
| Bottler, Frederick and Josephine, House |
| Brunswick Hotel |
| Buck, Charles Amos, House |
| Buck, Fred, House |
| California Creek Quarry |
| Cammock's Hotel |
| Citadel Rock |
| Clack, H. Earl, Service Station |
| Commercial District |
| Commercial District |
| Conrad, Charles E., Mansion |
| Cooke City Store |
| Coram Hotel, The |
| Crystal Ice & Fuel Company |
| Culver Studio |
| Dave's Texaco |
| Davidson Building |
| Dayton State Bank |
| Deer Lodge Central Business Historic District |
| Dixon-Duncan Block |
| Doe, M. E., House |
| Dorsey Grocery and Residence |
| Draft Horse Barn, Fergus County Fairgrounds |
| Dude Rancher Lodge |
| East Side Historic District |
| Eder, Charles S., House |
| Edwards & McLellan Block |
| Electric Building |
| Equity Supply Company Elevator and Creamery |
| Farmers and Merchants State Bank |
| Farmers Trading Company |
| First National Bank of Ekalaka and Rickard Hardware Store Building |
| First National Bank of Geraldine |
| First National Bank of Glasgow |
| First State Bank, Dowling and Emhoff Buildings |
| First State Bank of Chester |
| Flathead Wholesale Grocery |
| Florence Hotel |
| F.M. Mack General Store |
| Forsyth Main Street Historic District |
| Fort Benton |
| Fort Benton Bridge |
| Fort Connah Site |
| Fort Missoula Historic District |
| Fort Owen |
| Fort Peck Agency |
| Fort Shaw Historic District and Cemetery |
| Gamble-Robinson Company Warehouse |
| Gem Saloon |
| Gibson-Lebert House |
| Gilman State Bank |
| Gladstone Hotel |
| Gleason Building |
| Gleim Building |
| Gleim Building II |
| Glidden Mercantile |
| Goosetown Historic District |
| Grand Hotel |
| Grand Pacific Hotel |
| Grand Union Hotel |
| Graves Hotel |
| Great Falls Central Business Historic District |
| Great Falls Railroad Historic District |
| Greenblatt, Samuel, House |
| Hale's Filling Station and Grocery |
| Hamilton Commercial Historic District |
| Hammond Arcade |
| Harmon, William, House |
| Headquarters Building and Daily Company Annex |
| Helena Historic District |
| Helena Railroad Depot Historic District |
Data from United States Park Service and Wikidata
