Louisiana - Area of significance: Architecture
| Kraemer House |
| Kress Building |
| LaBarre House |
| Labatut |
| LaBranche Plantation Dependency |
| Labyche-Estorge House |
| Lafayette Cemetery No. 1 |
| Lafayette Central Business District |
| Lafayette Elementary School |
| Lafayette Hardware Store |
| Lafitte's Blacksmith Shop |
| LaFleur House |
| Lafourche Parish Courthouse |
| Lake Charles City Hall, Old |
| Lake Charles Historic District |
| Lake Providence Historic District |
| Lake Providence Residential Street Historic District |
| Lakeside |
| Lakewood |
| LaLanne, Dominique, House and Store |
| Lamartina Building |
| Lambert House |
| Lamorandier-Prudhomme-Jackson House |
| Lancon, Hilaire, House |
| Landry, Kenneth C. and Carolyn B., House |
| Landry Plantation House |
| Landry Tomb |
| Lane Plantation House |
| Laran, Jean Marie, House |
| Latiolais, Alexandre, House |
| LaTour, Alexis, House |
| Laura Plantation |
| Laurel Hill |
| Laurel Street Fire Station |
| Laurel Valley Sugar Plantation |
| 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 |
| 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 |
| Lincoln, George, House |
| Lindsay, Col. Robert H., House |
| 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 |
| Long, George Parker, House |
| Long, Huey P., Mansion |
| Long, Huey P., Memorial Hospital |
| Longue Vue House and Gardens |
| Longview |
| Longwood |
| Louisiana State Bank Building |
| Louisiana State Capitol Building and Gardens |
| Louisiana State Exhibit Building |
| Louisiana State University, Baton Rouge |
| Louisiana Superdome |
| Lowe-Forman House |
| Lower Central Business District |
| Lower Garden District |
| Lower Pargoud |
| Loyd Hall Plantation |
| Lozano, Louis S., House |
| Lucky Plantation House |
| Lutcher United Methodist Church |
| Lyons, Benson H., House |
| Lyons House |
| Lyons House |
| Macedonia Baptist Church |
| Macheca Building |
| Madame John's Legacy |
| Madewood |
| Madison Parish Courthouse |
| Madisonville Bank |
| Magee, Nehemiah, House |
| Magee, Robert D., House |
| Magnolia |
| Magnolia Lane Plantation House |
| Magnolia Mound Plantation Dependency |
| Magnolia Mound Plantation House |
Data from United States Park Service and Wikidata
