Montana - Constructed - 1910–1919
| Acme Building |
| Ainsworth House |
| Alberton School |
| Anaconda Copper Mining Company Smoke Stack |
| Apartment Building at 116 Spruce Street |
| Ayers House |
| Baldwin Building |
| Baldwin House |
| Barrett, Martin, House |
| Beck, Alice, Cabin |
| Bedard House |
| Belgrade City Hall and Jail |
| Bestwick's Market |
| Big Arm School |
| Billings Chamber of Commerce Building |
| Billsborough House |
| Blackstock Residence |
| Blue Front Rooming House |
| Boyd's Shop |
| Brinks House |
| Carnegie Public Library |
| Daniels County Courthouse |
| Dayton State Bank |
| Dean School |
| Fire House No. 2 |
| Fromberg Concrete Arch Bridge |
| Glendive City Water Filtration Plant |
| Glendive Heat, Light and Power Company Power Plant |
| Goff House |
| Granite Park Chalet |
| Greenblatt, Samuel, House |
| Griffen House |
| Hellgate Lodge 383 BPOE |
| Hoyt House |
| Huntoon Residence |
| Ingomar Public School |
| Kalispell Monumental Company |
| Margaret Block |
| Mountain States Telephone and Telegraph Company |
| Norby House |
| Oliver Building |
| Polson Feed Mill |
| Prescott Commons |
| Raymond Grain Elevators Historic District |
| Rosebud County Courthouse |
| Rundle Building |
| Saint Mary Ranger Station |
| Sargent, Charles C., House |
| Sherwood Lodge |
| Spannring, John Otto, Family Farm |
| Sperry Chalets |
| St. Joseph's Catholic Church |
| Sullivan, James J., House |
| Thorn House |
| Tourist Hotel |
| Trident School |
| Ursuline Academy |
| US Post Office-Miles City Main |
| Wilson House |
Data from United States Park Service and Wikidata
