All - Constructed - 1930–1939
| Johnson, Armstead T., High School |
| Johnson, Herbert F., House |
| Jones, Edward L., House |
| Julian-Drew Building |
| Juneau County Courthouse |
| Junior Order United American Mechanics National Orphans Home |
| Kansas City Power and Light Company Building |
| Keewaydin Club |
| Kendall, Virginia, State Park Historic District |
| Kenilworth Aquatic Gardens |
| Kennedy Jr., Thomas P., House |
| Kennedy-Warren Apartment Building |
| Kenney Lake Overlook |
| Kewaunee Post Office |
| Kiggins Theater |
| Killefer, Lydia D., School |
| Kimmel Kabins |
| Kimsey Junior College |
| Kingfisher Armory |
| Kings Mountain National Military Park |
| King Street Overhead Bridge |
| Kinjockity Ranch |
| Kirkland Lookout Ground House (Guard Station) |
| Knapp, J.W., Company Building |
| Kocher-Samson Building |
| Konawa Armory |
| Kreinbring Phillips 66 Gas Station |
| Kresge Building |
| Kress, S. H., and Company Building |
| Kurtz, J., and Sons Store Building |
| Laboratory of Anthropology Director’s Residence |
| La Casina |
| LaCrosse State Teachers College Training School Building |
| Ladew Topiary Gardens and House |
| Lake County Courthouse |
| Lake George Patrol Cabin |
| Lake Haiyaha Trail |
| Lake Michigan Beach House, Ludington State Park |
| Lakeside Cemetery Chapel |
| Lake St. Croix Overlook |
| Lamb Creek School |
| La Mesa Motel |
| Lancaster Post Office |
| Lane County Community High School |
| Langston Golf Course Historic District |
| Larson, A. E., Building |
| Larwood Bridge |
| Las Acequias |
| Lava High School Gymnasium |
| L.D.S. Ward Building |
| Lea County Courthouse |
| Leaning Tower of Niles, The |
| Lebanon Lodge No. 22 |
| Lee Butte Lookout Tower and Cabin |
| Lee, Robert E., School |
| Legion State Park |
| Lehman, John H., High School |
| Lembke House |
| Lenoir High School |
| Lescaze House |
| Levin, Adolph, Cottage |
| Lewis and Clark Bridge |
| Liggett and Meyers Harpring Tobacco Storage Warehouse |
| Lincoln, Abraham, Memorial Garden |
| Lincoln Creek Day School |
| Lincoln Creek Snowshoe Cabin |
| Lincoln Pioneer Village |
| Lincoln School |
| Lincoln YWCA Building |
| Lindbergh, Charles A., House and Park |
| Linwood Colonial Apartments |
| Lithodendron Wash Bridge |
| Little Buffalo River Bridge |
| Little Cabin Creek Bridge |
| Little Lithodendron Wash Bridge |
| Little River High School |
| Little Rock Boys Club |
| Little Rock US Post Office and Courthouse |
| Little Theatre |
| Lock and Dam No. 14 Historic District |
| Lodge Grass City Jail |
| Loeb, Ernest, House |
| Loew, William Goadby, House |
| Loftin Farm |
| Logan High School Gymnasium |
| Log Cabin |
| Loneman Fire Lookout |
| Longfellow School |
| Long Island National Cemetery |
| Longleat |
| Longview Bridge |
| Longview Gardens Historic District |
| Loop C Comfort Station |
| Loop D Comfort Station |
| Lorain-Carnegie Bridge |
| Lordsburg-Hidalgo County Library |
| Los Angeles Union Passenger Terminal |
| Lost Lake Trail |
| Lowell Ranger Station |
| Lower East Fork Ranger Cabin No. 9 |
Data from United States Park Service and Wikidata
