All - Architectural style - Gothic Revival
| Joshua Chapel A.M.E. Church |
| Jubilee Hall, Fisk University |
| Kane, Thomas L., Memorial Chapel |
| Kansas City Club Building |
| Kaumakapili Church |
| Kehukee Primative Baptist Church |
| Kellogg, Elijah, Church |
| Kelly, T.R., House |
| Kemper Hall |
| Kendall County Courthouse and Jail |
| Kent, Charles House |
| Kewawenon Mission |
| Keyser-Cullen House |
| Kinderhook Village District |
| King, Charles, House |
| King, Dr. Franklin, House-Idlewild |
| King, Gov. William, House |
| Kingscote |
| Kitchi Gammi Club |
| Klaus Block |
| Koester, Charles, House |
| Kolping Park and Chapel |
| Kumler, Elias, House |
| Kuppenheimer, Louis B., Jr., House |
| Lachmund Family House |
| La Crosse County School of Agriculture and Domestic Economy |
| Ladbury Church |
| Lafayette Elementary School |
| LaGrange Presbyterian Church |
| Lake Madison Lutheran Church |
| Lake-Peterson House |
| Lakeside Cemetery Chapel |
| Lamar Building |
| Lancaster County House of Employment |
| Lancaster Presbyterian Church |
| Lane, Fitz Henry (formerly known as Fitz Hugh), House |
| Lane-Hooven House |
| Lanier, Sidney, Cottage |
| Lardner, Ring, House |
| Larsen-Noyes House |
| Lawn, The |
| Lawn, The |
| Lawton, George H., House |
| Leavitt, A. B., House |
| Le Duc, William G., House |
| Leeds Iron Foundry |
| Lee, John and Rosetta, House |
| Lehi North Branch Meetinghouse |
| Leitch, William T., House |
| Leland Castle |
| Leuty, Isaac, House |
| Lewis, Sinclair, Boyhood Home |
| Lewis-Williams House |
| Liberty Baptist Church |
| Liberty Tower |
| Liggett Building |
| Lighthouse |
| Lincoln School |
| Littel-Lord Farmstead |
| Littig, John, House |
| Little Church of the West |
| Little Creek Methodist Church |
| Little Red |
| Little Rock Central High School |
| Llenroc |
| Logan LDS Sixth Ward Church |
| Logan Temple |
| Longfield |
| Longview Community Church |
| Lord, Dr. John, House |
| Loudoun House |
| Lutcher United Methodist Church |
| Lutheran Indian Mission |
| Luther Place Memorial Church |
| Lyerly Building for Boys |
| Lyman, David, II, House |
| Lyman, William and Julia, House |
| Lynch Chapel United Methodist Church |
| Lyndhurst, Jay Gould Estate |
| Lynnford-Lyndon Hall |
| Lynnwood Farm |
| Madam Fredin's Eden Park School and Neighboring Row House |
| Maddox, John W., House |
| Madison School |
| Magnolia Plantation |
| Mahaska Rural High School #3 |
| Main Building, Southwest Texas Normal School |
| Maine Woods Office |
| Main Street Building, United Church of Ovid |
| Malbone |
| Mamaroneck Methodist Church |
| Mann, James H., House |
| Manship House |
| Manti Presbyterian Church |
| Maple Lawn |
| Maplewood Chapel |
| Marentis House |
| Mariners' Church |
| Marion Cemetery Receiving Vault |
| Marsh, John, House |
Data from United States Park Service and Wikidata
