Louisiana - Role: Building
| Laurel Street Fire Station |
| LeBeau House and Kitchen |
| LeBeuf Plantation House |
| LeBlanc House |
| LeCarpentier-Beauregard-Keyes House |
| Lecompte High School |
| Ledet House |
| Leeds Iron Foundry |
| Lefort House |
| LeJeune House |
| LeJeune's Bakery |
| Leland College |
| Lemann Store |
| Lemoine, Thomas A., House |
| Lemoine, Thomas A., House |
| Les Chenes Verts |
| Le Vieux Presbytere |
| Lewis House |
| Lewis House |
| Lewis, John, House |
| Liberty Lodge No. 123, F & A M |
| Liberty Theatre |
| Lincoln, George, House |
| Lincoln Theater |
| Lindsay, Col. Robert H., House |
| Lindsey Bonded Warehouses |
| Line Avenue School |
| Linwood |
| Linwood Plantation Manager's House |
| Lisburn Plantation House |
| Little Texas |
| Live Oak |
| Live Oaks Plantation |
| Livingston Parish Courthouse, Old |
| Lobell, Adam, House |
| Logtown Plantation |
| Lone Pine |
| Longbranch Annex |
| Long, George Parker, House |
| Long, Huey P., House |
| Long, Huey P., Mansion |
| Longstreet Rosenwald School |
| Longue Vue House and Gardens |
| Longview |
| Longwood |
| Louisiana Coca-Cola Bottling Company Plant |
| Louisiana Railway and Navigation Company Depot |
| Louisiana State Bank Building |
| Louisiana State Capitol Building and Gardens |
| Louisiana State Exhibit Building |
| Louisiana Superdome |
| Lowe-Forman House |
| Lower Pargoud |
| Loyd Hall Plantation |
| Lozano, Louis S., House |
| Lucky Plantation House |
| Lutcher & Moore Cypress Lumber Co., Ltd., Headquarters Building |
| Lutcher United Methodist Church |
| Lutzenberger Foundry and Pattern Shop Building |
| Lyons, Benson H., House |
| Lyons House |
| Lyons House |
| Macedonia Baptist Church |
| Macheca Building |
| Madame John's Legacy |
| Madewood |
| Madison Parish Courthouse |
| Madisonville Bank |
| Madisonville Boarding House |
| Madisonville Town Hall |
| Magee, Nehemiah, House |
| Magee, Robert D., House |
| Magnolia |
| Magnolia Lane Plantation House |
| Magnolia Mound Plantation Dependency |
| Magnolia Mound Plantation House |
| Magnolia Plantation |
| Magnolias, The |
| Mahaffey, T. C., House |
| Maison De Marie Therese |
| Maison Olivier (Acadian House) |
| Major, Albin, House |
| Manresa House of Retreats/Jefferson College |
| Manship House |
| Marengo Plantation House |
| Marston House |
| Martin, Ed, Seafood Company Factory and House |
| Martin House |
| Martin, Sidney, House |
| Mary Plantation House |
| Mason House |
| Masonic Building |
| Masonic Home for Children |
| Masonic Temple |
| Masur House |
| Mather House |
| May, David L. and Jeanette Ross, House |
| Maylie's Restaurant |
| McCaleb House |
| McClendon House |
Data from United States Park Service and Wikidata
