Montana - Constructed - 1900–1909
| Alexander and Busey Houses |
| Atlantic Hotel |
| Baker and Lovering Store |
| Bass Mansion |
| Bean, Daniel V., House |
| Big Timber Town Hall |
| Blood, Oliver, House |
| Cold Springs Ranch House |
| Corey House |
| DeBorgia Schoolhouse |
| Doe, M. E., House |
| Ellis, E. G., House |
| Emhoff House |
| Ford, Lee M., House |
| Forsman House |
| Gebo Barn |
| Gebo, Henry, House |
| Glidden House |
| Graves Hotel |
| Halfway House |
| Hogeland, Abraham and Mary Walton, House |
| Hutchins Bridge |
| Jacobs, Michael, House |
| Joliet Bridge |
| Kevin Depot |
| Kintla Lake Ranger Station |
| Lancaster House |
| Larsen, Aage and Kristine, Homestead |
| Logging Creek Ranger Station Historic District |
| Lundwall, Charles, Building |
| Malmborg School |
| McCarthy Homestead Cabin |
| McCone Residence |
| Montana State Capitol Building |
| North, Austin, House |
| Northern Pacific Railroad Settling Tanks |
| Northern Pacific Warehouse |
| Palace Hotel |
| Preston House |
| Reese Creek School |
| Rolfson House |
| Saco Mercantile |
| Saint Mary of the Assumption |
| Sanders County Jail |
| Smith Mine Historic District |
| St. Joseph's Hospital |
| Stoltz House |
| Stout, John, House |
| Suydam, Hester E., Boarding House |
| Thayer House |
| U. S. Post Office |
| Walsh, Johnnie, Homestead |
| Weber's Store |
| Wheeler, Burton K., House |
| Williams House |
| Williams, John and Ann, House |
| Woll House |
Data from United States Park Service and Wikidata
