Idaho - Significance region: Local
| Foskett, Dr. Wilson, Home and Drugstore |
| Foster, Blacky, House |
| Four-Room House |
| Fox, J. C., Building |
| Fox-Worswick House |
| Franklin City Hall |
| Franklin School |
| Freeze Community Church |
| Friedline Apartments |
| Fritchman, H. K., House |
| Fry, Merrit, Farm |
| Fry's Trading Post |
| Funsten, Bishop, House |
| Gaches, George H., Cellar and Ice House |
| Gakey, J. H., House |
| Garfield School |
| Garfield School |
| Gem County Courthouse |
| Georgetown Relief Society Hall |
| Gleason, F. C. House |
| Glenns Ferry School |
| Goff, Hugh and Susie, House |
| Gold Point Mill |
| Gooding, Thomas, Water Tank House |
| Gorby Opera Theater |
| Goreczky, Anton, House |
| Gottfried, Gehrig, Cabin |
| Graves, Lulu, Farm |
| Gray, John P. and Stella, House |
| Greenhow and Rumsey Store Building |
| Green, John, Mausoleum |
| Greenwood School |
| Gregg, Edward M., Farm |
| Grimmett, John, Jr., House and Outbuildings |
| Grimmett, Orson, Bungalow |
| Grunder Cabin and Outbuildings |
| Guernsey Dairy Milk Depot |
| Gusman, James E., and Emma, Ranch |
| Haas, Bernard, House |
| Haas, Herman, House |
| Hagerman State Bank, Limited |
| Hailey Masonic Lodge |
| Hailey Methodist Episcopal Church |
| Haines, John, House |
| Hamilton, Boyd and Alta, House |
| Hammett School |
| Harkness, H. O., Stable Building |
| Harrison Commercial Historic District |
| Harvey Mountain Quarry |
| Hasbrouck Building |
| Havens, Bert and Fay, House |
| Hays, Samuel, House |
| Hazelton Presbyterian Church |
| Hester, Patrick J. and Lydia, House |
| Hill, Clara, House |
| Hill, Matt N., Homestead Barn |
| Hoffman Barn |
| Hoge, Walter, House |
| Hollingshead Homestead |
| Hollister School |
| Holy Rosary Church |
| Hopffgarten House |
| Hopkins, William, House |
| Hosford, Emmett, House |
| Hotel Bovill |
| Hotel Buhl |
| Hotel Charbonneau |
| Hotel Idaho |
| Hotel Moscow |
| Hotel Paris |
| Hotel Patrie |
| Hotel Rietmann |
| Hottes, Fred, House |
| Houlder, Ellen, Farm |
| Huer Well House/Water Tank |
| Hulme, Amos, Barn |
| Hunt, Daniel A., House |
| Hunt, E. F., House |
| Hyde Park Historic District |
| Hyde, William A., House |
| Idaho Falls Airport Historic District |
| Idaho Falls City Building |
| Idaho Falls Public Library |
| Idaho Grocery Warehouse and Annex |
| Idaho Mining and Smelter Company Store |
| Idaho National Guard Armory |
| Idaho Republican Building |
| Idaho State Forester's Building |
| Idaho State Industrial School Women's Dormitory |
| Idaho State University Administration Building |
| Idaho State University Neighborhood Historic District |
| Immanuel Methodist Episcopal Church |
| Independent Order of Odd Fellows Hall |
| Indian Mountain Fire Lookout |
| Indian Springs School II |
| Innes, Kate, House |
| Innes, Thomas, House |
| Institute Canal Company Pump House |
| Iona Meetinghouse |
| I.O.O.F. Building |
Data from United States Park Service and Wikidata
