All - Constructed - 1890–1899
| LaGrange Presbyterian Church |
| Lais, Charles, House |
| Lake Compounce Carousel |
| Lake Hotel |
| Lake, John, House |
| Lakes, Arthur, Log House |
| Lake Shore And Michigan Southern Railroad Depot |
| Lakeside Mills Historic District |
| Lakeside Press Building |
| Lake View Cemetery |
| Lamb Block |
| Lammers, Albert, House |
| L and L Building |
| Land Title Building |
| Langmaid Terrace |
| La Pointe Light Station |
| Largilliere, Edgar Walter, Sr., House |
| Larsen-Noyes House |
| Las Dos Naciones Cigar Factory |
| Lasky-DeMille Barn |
| Laue, Frederick, Jr., House |
| Laurel High School |
| Layton, John Henry, House |
| Leatherwood Station Bridge |
| Leavitt, A. B., House |
| Lee, Charles W. and Leah, House |
| Leeds Tithing Office |
| Lee, Robert E., Monument |
| LeFevre, Owen E., House |
| Le Grand Bridge |
| Lehigh Valley Railroad Station |
| Lehi North Branch Meetinghouse |
| Leiter II Building |
| Leonard. Shaw & Dean Shoe Factory |
| Levering, William, School |
| Lewelling, Governor L.D., House |
| Lewis, A. J., House |
| Lewiston City Hall |
| Libby, Nelson F., House |
| Liberty Arming the Patriot |
| Liberty County Jail |
| Library Park |
| Liddell-McNinch House |
| Lieblein House |
| Lightfoot, George M., House |
| Lilly, Edward S. and Mary Annatoile Albert, House |
| Lincoln House Club |
| Lincoln School |
| Lindauer and Rupert Block |
| Linden Street Bridge |
| Lindsley, Perry, House |
| Lits Department Store |
| Little Post Office |
| Little, Thomas K., House |
| Lloyd, Harold, Birthplace |
| Loa Tithing Office |
| Locke School |
| Locust Avenue School |
| Logan, Henry, Memorial AME Church |
| Logia Masonica Hijos de la Luz |
| London, Henry Adolphus, House |
| Longley, Howard, House |
| Loring, George, House |
| Los Duranes Chapel |
| Louden, William and Mary Jane, House |
| Lounsbury, Phineas Chapman, House |
| Lovejoy Homestead |
| Lover's Leap Bridge |
| Lowell Elementary School |
| Lowell Observatory |
| Lowell Post Office |
| Lowenstein House |
| Lubbock High School |
| Lubec Channel Light Station |
| Luce Hall |
| Ludington Building |
| Luzon Apartment Building |
| Lyman, William and Julia, House |
| Lyric Theatre |
| Mabey, Albert and Celestine, House |
| MacDonell House |
| Machinery Row |
| Mackinac Point Lighthouse |
| Madden, Charles, House |
| Madison Avenue Facade of the Squadron A Armory |
| Madrid Historic District |
| Maher, George W., House |
| Maine Industrial School for Girls Historic District |
| Maine State Building |
| Majestic Building |
| Mallon Building |
| Manhattan Building |
| Manhattan Building |
| Manor Street Elementary School |
| Marcyes, Claude O., House |
| Marion House and Marion Brothers Store |
| Marlborough Brook Filter Beds |
| Marshall County Courthouse |
| Marsh, E.A. and Rebecca (Johnson), House |
| Martin, Aaron, Houses |
Data from United States Park Service and Wikidata
