Massachusetts - Significance region: Local
| Lennon, Edward J., House |
| Lenox High School |
| Lenox Railroad Station |
| Lenox Street Apartments Historic District |
| Lenox Village Historic District |
| Leominster High School |
| Leonard, Capt. Charles, House |
| Leonard, James, House |
| Leonard School |
| Leonard. Shaw & Dean Shoe Factory |
| Levenson, Morris, Three-Decker |
| Leverett Center Historic District |
| Lewis, Charles D., House |
| Lewis, Deacon Willard, House |
| Lewis House |
| Lewis, Joshua, House |
| L.H. Hamel Leather Company Historic District |
| Libby, Nelson F., House |
| Liberty Hall |
| Lincoln, Ambrose, Jr., House |
| Lincoln, Asa, House |
| Lincoln Center Historic District |
| Lincoln, Gen. Thomas, House |
| Lincoln Historic District |
| Lincoln House Club |
| Lincoln-Sunset Historic District |
| Linden Street Bridge |
| Linwood Historic District |
| Locke, Asa, House |
| Locke-Baldwin-Kinsley House |
| Locke, Capt. Benjamin, House |
| Locke, Capt. Josiah, House |
| Locke, Lt. Benjamin, Store |
| Locke School |
| Lockhardt, Charles H., House |
| Lockville Historic District |
| Longmeadow Historic District |
| Longmeadow Street-North Historic District |
| Long Plain Cemetery |
| Long Plain School |
| Longwood Historic District |
| Lord-Baylies-Bennett House |
| Lord's Castle |
| Loring, George, House |
| Loring, Harrison, House |
| Lothrop, Caleb, House |
| Lothrop, H.B., Store |
| Lothrop Memorial Building-G.A.R. Hall |
| Lovejoy, A. L., House |
| Lovejoy, Charles, House |
| Lovell Block |
| Lovell, Capt. George, House |
| Lovell, Nehemiah, House |
| Lowell Cemetery |
| Lowell Post Office |
| Lowell, The |
| Lower Historic District |
| Lower Roxbury Historic District |
| Lower Union Street Historic District |
| Lowney Chocolate Factory |
| Ludlow Center Historic District |
| Luke, Arthur F., House |
| Lumb, Thomas, Three-Decker |
| Lumb, Thomas, Three-Decker |
| Lundberg, Charles, Three-Decker |
| Lunenburg Historic District |
| Luther House |
| Luther's Corner |
| Luther Store |
| Luther, William, House |
| Lyman Block |
| Lyman Street Historic District |
| Lyman, Theodore, School |
| Lynn, Armory |
| Lynn Bank Block |
| Lynn Common Historic District |
| Lynn Item Building |
| Lynn Masonic Hall |
| Lynn Memorial City Hall and Auditorium |
| Lynn Public Library |
| Lynn Realty Company Building No. 2 |
| Lynnwood |
| Lynn Woods Historic District |
| Lyon, T.U., House |
| Macomber, Calvin T., House |
| Macy-Colby House |
| Magnuson, Charles, Three-Decker |
| Mahaiwe Block |
| Main and Franklin Streets Historic District |
| Main Street and Murray Avenue Historic District |
| Main Street Cemetery |
| Main Street Historic District |
| Main Street Historic District |
| Main Street Historic District |
| Main Street Historic District |
| Main Street Historic District |
| Main Street Historic District |
| Main Street-Locke |
| Makepeace, D. E., Company |
| Malden City Infirmary |
Data from United States Park Service and Wikidata
