Florida - Area of significance: Architecture
| Lamb, A.M., House |
| Lane-Towers House |
| Larimer Memorial Library |
| Laroe Family Homestead Historic District |
| Latimer Cabin |
| Laughlin, James, House |
| Launch Control Center |
| Laurel Park Historic District |
| Lavalle House |
| Lavender House |
| LeClaire Apartments |
| Lee County Courthouse |
| Leigh, Charles E., House |
| Leiman House |
| Leon County Health Unit Building |
| Leon High School |
| Levillain-Letton House |
| Lewis House |
| Lewis Mausoleum |
| Lewis, W. Henry, House |
| Liberty Hill Schoolhouse |
| Library East |
| Lichgate on High Road |
| Lincoln Lane School |
| Lincolnville Historic District |
| Lindeman-Johnson House |
| Lindsley, Halstead and Emily, House |
| Lindsley House |
| Lippincott Mansion |
| Little Theatre |
| Little White House |
| Llambias House |
| Lloyd Historic District |
| Lloyd Railroad Depot |
| L & N Marine Terminal Building |
| Lodge and Hut |
| Long House |
| Longwood Historic District |
| Longwood Hotel |
| Longwood House |
| Lopez, Xavier, House |
| Los Robles Gate |
| Los Robles Historic District |
| Louisville and Nashville Depot |
| Louisville and Nashville Passenger Station and Express Building |
| Love, E. C., House |
| Lummus Park Historic District |
| Lutz Elementary School, Old |
| Lynch Building |
| Lyndhurst Plantation |
| Lyric Theater |
| Lyric Theatre |
| MacFarlane Homestead Historic District |
| Madison County Training School |
| Magnolia Heights Historic District |
| Maitland Art Center |
| Mandarin Store and Post Office |
| Mango Promenade Historic District |
| Mann Manor |
| Marabanong |
| Mar-A-Lago National Historic Landmark |
| Marianna Historic District |
| Marina Historic District |
| Marion Hotel |
| Markland |
| Markowitz House |
| Martello Gallery-Key West Art and Historical Museum |
| Martina Apartments |
| Martin County Court House, Old |
| Martin, Gov. John W., House |
| Marzoni House |
| Masonic Temple |
| Masonic Temple |
| Masonic Temple No. 25 |
| Matecumbe Methodist Church |
| Matheson House |
| May, Asa, House |
| May-Stringer House |
| McCollum Hall |
| McFarlin, John Lee, House |
| McIntosh Historic District |
| McKeage, John & Florence, House |
| McKenzie, Mary Phifer, House |
| McKinley Climatic Laboratory |
| Melrose Historic District |
| Memorial Cemetery |
| Memorial Home Community Historic District |
| Merchants Bank Building |
| Merrick-Simmons House |
| Methodist Episcopal Church at Black Creek |
| Methodist Episcopal Church, South, at Umatilla |
| Meyer-Davis House-Hasty Cottage |
| Meyer-Kiser Building |
| Miakka School House |
| Miami Beach Architectural District |
| Miami-Biltmore Hotel |
| Miami Edison Senior High School |
| Miami Marine Stadium |
| Miami Senior High School |
| Miami Women's Club |
Data from United States Park Service and Wikidata
