Idaho - Significance region: Local
| I.O.O.F. Hall |
| Island Park Land and Cattle Company Home Ranch |
| Jacobsen, N. A., Building |
| Jacobsen, N.A., House |
| Jaussi Bungalow |
| J.C. Penney Company Building |
| Jefferson, W. E., House |
| Jerome City Pump House |
| Jerome Cooperative Creamery |
| Jerome First Baptist Church |
| Jewell Building |
| Johnson, Edgar, House |
| Johnson Flying Service Hangar |
| Johnson, J. M., House |
| Johnson, Louis, Barn |
| Johnson, Louis, Water Tank House |
| Johnson, Quet, Farm |
| Jones, J. W., Building |
| Jones, T. J., Apartments |
| Just, Nels and Emma, House |
| Kappa Sigma Fraternity, Gamma Theta Chapter |
| Keating, Clarence, House |
| Kehrer, Thomas J., House |
| Kelley, Marion and Julia, House |
| Kellogg Boy Scout Cabin |
| Kelly's Hotel |
| Kelsey, Robert, Bungalow |
| Kendrick Downtown Historic District |
| Kendrick Fraternal Temple |
| Kenworthy Theatre |
| Ketchum Ranger District Administrative Site |
| Kettenbach, Henry C., House |
| Kieldson Double House |
| Kimberly High School |
| Kinney, Joseph, Mausoleum |
| Kirby, Thomas, House |
| Kohl, W. S., Barn |
| Kootenai County Jail |
| Krassel Ranger Station |
| Kress Building |
| Kunze, Rudolf, Barn |
| Kurtz-Van Sicklin House |
| KwikCurb Diner |
| Laine, James H., Barn |
| Lake Pend Oreille Lime and Cement Industry Historic District |
| Lamb Creek School |
| Lane School II |
| Largilliere, Edgar Walter, Sr., House |
| Larsen, Archie, House |
| Latham Bungalow |
| Laughlin, Ben, Water Tank House-Garage |
| Lava High School Gymnasium |
| Law, Oren, House and Outbuildings |
| Lawrence, Russell, Farmstead |
| Lawshe, George, Well House |
| LDS Seminary |
| LDS Stake Office Building |
| L.D.S. Ward Building |
| Lee, J.O., Honey House |
| Lee, J. O., House |
| Lemhi Boarding School Girls Dormitory |
| Lemmon Hardware Store |
| Lewis Barn |
| Lewis Bungalow |
| Lewis, Fred, Cottage |
| Lewiston City Hall |
| Lewiston Methodist Church |
| Lewiston Vineyards Gates |
| Lieuallen, Almon Asbury, House |
| Lilyquist-Christianson Building |
| Lincoln Creek Day School |
| Lincoln-Johnson Avenues Residential Historic District |
| Lincoln School |
| Lincoln Street Electric Streetlights |
| Linvall, J. L., House and Outbuilding |
| Linvall, Robb, House |
| Little, Thomas K., House |
| Lockman, Jacob P. House |
| Longfellow School |
| Long Valley Finnish Church |
| Lowell Municipal Pool |
| Lowell School |
| Lower Main Street Commercial Historic District |
| Low, Morris, Bungalow |
| Mackay Episcopal Church |
| Mackay Methodist Episcopal Church |
| MacMillan Chapel |
| Magee Ranger Station |
| Malad Second Ward Tabernacle |
| Mandl, Joseph, House |
| Marks, M. J., House |
| Maxwell, Art and Frieda, Barn |
| Mays, James Henry and Ida Owen, House |
| McCall District Administrative Site |
| McCammon State Bank Building |
| McCollum, Robert, House |
| McElroy, H. E., House |
| McGinnis, J. S., Building |
| McGuires School |
| McKendrick House |
Data from United States Park Service and Wikidata
