Idaho - Criteria: C (architecture/engineering)
| Farmers and Merchants Bank |
| Farmers and Merchants Bank Building |
| Feehan, John C., House |
| Fenn Ranger Station |
| Finch, John A., Caretaker's House |
| First Baptist Church of Emmett |
| First Christian Church |
| First Lapwai Bank |
| First Methodist Church |
| First Presbyterian Church |
| First Presbyterian Church |
| First Presbyterian Church |
| First United Methodist Church |
| Fish Creek Dam |
| Fisher, James M., House |
| Fleharty, Alva, House |
| Fort Street Historic District |
| Foster, Blacky, House |
| Four-Room House |
| Fox, J. C., Building |
| Franklin City Hall |
| Franklin Co-operative Mercantile Institution |
| Franklin County Courthouse |
| Franklin School |
| Freeze Community Church |
| Fremont County Courthouse |
| Friedline Apartments |
| Fritchman, H. K., House |
| Fry, Merrit, Farm |
| Funsten, Bishop, House |
| Gakey, J. H., House |
| Galloway, Thomas C., House |
| Gardiner Peak Lookout |
| Garfield School |
| Garfield School |
| GAR Hall |
| Geertson, Lars, House |
| Gem County Courthouse |
| Genesee Exchange Bank |
| Gimlet Pegram Truss Railroad Bridge |
| 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 |
| Grace Pegram Truss Railroad Bridge |
| Graves, Lulu, Farm |
| Gray, John P. and Stella, House |
| Greenhow and Rumsey Store Building |
| Green, John, Mausoleum |
| Gregg, Edward M., Farm |
| Grimmett, John, Jr., House and Outbuildings |
| Grimmett, Orson, Bungalow |
| Grunder Cabin and Outbuildings |
| Guernsey Dairy Milk Depot |
| Haas, Bernard, House |
| Haas, Herman, House |
| Hagerman State Bank, Limited |
| Hailey Methodist Episcopal Church |
| Haines, John, House |
| Harrison Boulevard Historic District |
| Harrison Commercial Historic District |
| Hasbrouck Building |
| Hatch, L. H., House |
| Havens, Bert and Fay, House |
| Hays, Samuel, House |
| Hazelton Presbyterian Church |
| Heigho, Col. E. M., House |
| Hill, Clara, House |
| Hill, Matt N., Homestead Barn |
| Hoge, Walter, House |
| Hollingshead Homestead |
| Holy Rosary Church |
| Hood, John, House |
| Hopffgarten House |
| Hopkins, William, House |
| Horse Barn |
| Hosford, Emmett, House |
| Hotel Buhl |
| Hotel Idaho |
| Hotel Moscow |
| Hotel Paris |
| Hotel Patrie |
| Hottes, Fred, House |
| Huer Well House/Water Tank |
| Hulme, Amos, Barn |
| Hunt, Daniel A., House |
| Hunt, E. F., House |
| Huntley, A. O., Barn |
| Hyde Park Historic District |
| Hyde, William A., House |
| Idaho Building |
| Idaho Falls City Building |
| Idaho Falls Public Library |
| Idaho Grocery Warehouse and Annex |
| Idaho National Guard Armory |
| Idaho Power Substation |
| Idaho Republican Building |
Data from United States Park Service and Wikidata
