Massachusetts - Criteria: A (event)
| Lockville Historic District |
| Longfellow House-Washington’s Headquarters National Historic Site |
| Long Island Head Light |
| Longmeadow Historic District |
| Longmeadow Street-North Historic District |
| Long Plain Friends Meetinghouse |
| Long Plain School |
| Long Point Light Station |
| Long Wharf and Custom House Block |
| Loring, George, House |
| Loring-Greenough House |
| Loring, Harrison, House |
| Lothrop, H.B., Store |
| Lothrop, Joseph, House |
| Lothrop Memorial Building-G.A.R. Hall |
| Lovejoy, A. L., House |
| Lowell Cemetery |
| Lowell Locks and Canals Historic District |
| Lowell National Historical Park |
| Lowell Post Office |
| Lowell's Boat Shop |
| Lowell School |
| Lower Highlands Historic District |
| Lower Historic District |
| Lower Roxbury Historic District |
| Lower Union Street Historic District |
| Lowney Chocolate Factory |
| Ludlow Center Historic District |
| Ludlow Village Historic District |
| Luke, Arthur F., House |
| Lumb, Thomas, Three-Decker |
| Lumb, Thomas, Three-Decker |
| LUNA (tugboat) |
| Lundberg, Charles, Three-Decker |
| Lunenburg Historic District |
| Luther's Corner |
| Luther Store |
| Luther, William, House |
| Lyman School for Boys |
| Lyman Street Historic District |
| Lyman, Theodore, School |
| Lynn Bank Block |
| Lynn Common Historic District |
| Lynn Fells Parkway, Metropolitan Park System of Greater Boston |
| Lynn Masonic Hall |
| Lynn Memorial City Hall and Auditorium |
| Lynn Public Library |
| Lynn Realty Company Building No. 2 |
| Lynnwood |
| Lynn Woods Historic District |
| Lyon's Turning Mill |
| Machine Shop Village District |
| Macy-Colby House |
| Magnuson, Charles, Three-Decker |
| Mahaiwe Block |
| 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 |
| Malcolm X-Ella Little Collins House |
| Malvern Road School |
| Manchaug Village Historic District |
| Manchester Village Historic District |
| Manley, William M., House |
| Manning Manse |
| Mann, James H., House |
| Manomet Mills |
| Maples Cottage |
| Maple Street Cemetery |
| Maple Street Historic District |
| Maplewood Cemetery |
| Marblehead Historic District |
| Marblehead Light |
| Marcia Browne Junior High School |
| Marconi-RCA Wireless Receiving Station |
| Marconi Wireless Station Site |
| Mariner's House |
| Market Square Historic District |
| Mark, John, Three-Decker |
| Marlborough Brook Filter Beds |
| Marlborough Center Historic District |
| Marshfield Hills Historic District |
| Marstons Mills Hearse House and Cemetery |
| Martha's Vineyard Campground |
| Martin, Aaron, House |
| Martin, Aaron, Houses |
| Martin House and Farm |
| Masonic Block |
| Masonic Temple |
| Masonic Temple |
| Mason, John, House |
| Mason, William P., House |
| Massachuetts Hornfels-Braintree Slate Quarry |
| Massachusetts Avenue Historic District |
| Massachusetts Fields School |
Data from United States Park Service and Wikidata
