Missouri - Significance region: Local
| Locust Hill |
| Locust Street Apartments |
| Locust Street Automotive District |
| Locust Street Historic District |
| Logan, John Sublett Jr. and Caroline Ashton, House |
| Long, R.A., Building |
| Long, William, Log House |
| Loose, Jacob, House |
| Loretto Academy |
| Loretto Academy |
| Louderman Building |
| Louise Apartments |
| Louisiana Chicago & Alton Railroad Depot |
| Louisiana Public Library |
| Love, Col. Thomas C., House |
| Love, Emily Rockwell, House |
| Lowe and Campbell Sporting Goods Building |
| Lowell School |
| Lower Parker School |
| Lucas Avenue Industrial Historic District |
| Luce-Dyer House |
| Lutheran Hospital and School of Nursing |
| Luyties Homeopathic Pharmacy Company Building |
| Luzier Special Formula Laboratories Building |
| Lyceum, The |
| Machpelah Cemetery |
| Mackay Building |
| Mack's Chapel Cemetery |
| Maclay Mansion |
| Macon County Courthouse and Annex |
| Madison County Courthouse |
| Magnolia Mills |
| Main and Eight Streets Historic District |
| Maine Apartments |
| Main-Spanish Commercial Historic District |
| Mainstreet Theatre |
| Majestic Apartments |
| Majestic Hotel |
| Majestic Manufacturing Company Buildings |
| Major Hotel |
| Manchester Methodist Episcopal Church |
| Manes, Calloway, Homestead |
| Mann, Horace, School |
| Mansion House Center Historic District |
| Mansur, Isiah, Farmstead Historic District |
| Maple Avenue Historic District |
| Maple Grove |
| Maples Apartments |
| Maplewood |
| Maplewood Commercial Historic District at Manchester and Sutton |
| Maplewood Historic Commercial District |
| Marceline Masonic Lodge #481 |
| Marceline Mercantile & Supply Company |
| Maries County Jail and Sheriff's House |
| Marine Villa Neighborhood Historic District |
| Marion County Courthouse |
| Marion County Jail and Jailor's House |
| Marks and Garvey Historic District |
| Mark Twain School |
| Marquette Hotel |
| Marquette Hotel |
| Marquette Hotel |
| Marshall Hotel |
| Marshall Place Historic District |
| Marshall School |
| Marshall School Neighborhood in The Ville Historic District |
| Marten-Becker House |
| Marthasville Hardware Building |
| Martin Hotel |
| Marty, Albert, Building |
| Marx-Hurlburt Building |
| Maryland Apartments |
| Maryland Hotel |
| Maryland Terrace Historic District |
| Maryville Post Office |
| Mason Building |
| Masonic Temple |
| Masonic Temple |
| Mavrakos Candy Company |
| May, Dr. H.A., House |
| Mayfair Apartment Hotel |
| Mayfair Hotel |
| Mayfield, Will, College Arts and Science Building |
| Mayfield, Will, College Campus |
| McBride, William Cullen, Catholic High School |
| McCain Furniture Store |
| McConahay Building |
| McCormick, Isaac, House |
| McCormick, James Robinson, House |
| McCutchen Theatre |
| McDaniel Building |
| McGarry House |
| McGee Street Automotive Historic District |
| McIntire, Levi, House |
| McIntyre-Burri House |
| McKinley Fox District |
| McKittrick Farmers Mercantile |
| McKoon, John, House |
| McLagan, Lizzie, House |
| McMahon Apartments |
Data from United States Park Service and Wikidata
