Idaho - Constructed - 1920–1929
| American Legion Cabin |
| Arco Baptist Community Church |
| Bell, R.H. and Jessie, House |
| Berriochoa, Ignacio, Farm |
| Bethany Deaconess Hospital |
| Bonneville Hotel |
| Boussuet, Birdie, Farm |
| Burnett, H. C., House |
| Catholic Church of the Sacred Heart |
| Crabtree, Glen and Addie, Cabin |
| Dunbar, William, House |
| First Christian Church |
| Hill, Clara, House |
| Huer Well House/Water Tank |
| Idaho Falls City Building |
| Laughlin, Ben, Water Tank House-Garage |
| Lochsa Historical Ranger Station |
| Mallard Peak Lookout |
| Mays, James Henry and Ida Owen, House |
| Memorial Gymnasium |
| Mountain States Telephone and Telegraph Company Building |
| Portia Club |
| Ramona Theater |
| Rice Meetinghouse |
| Sandpoint Federal Building |
| St. Alphonsus' Hospital Nurses' Home and Heating Plant/Laundry |
| St. John's Cathedral |
| Union Pacific Mainline Depot |
| Webster, Archie, House |
| Wellman Apartments |
| White Bird Grade |
Data from United States Park Service and Wikidata
