Massachusetts - Area of significance: Community Planning
| Mason, John, House |
| Massachusetts Avenue Historic District |
| Massachusetts Fields School |
| Massad, Anthony, Three-Decker |
| Maynard, Charles, House |
| McCafferty, Elizabeth, Three-Decker |
| McCarron, Andrew, Three-Decker |
| McDermott, John B., Three-Decker |
| McElwain, William H., School |
| McGill, John H., House |
| McGrath, Patrick, Three-Decker |
| McGuinness, Patrick, Three-Decker |
| McIntire, Herman, House |
| McIntosh Corner Historic District |
| McKnight District |
| McLean Hospital National Register District |
| McPartland, Frank, Three-Decker |
| McPartland, James, Three-Decker |
| Medway Village Historic District |
| Melrose Public Library |
| Memorial Hall Library |
| Mendon Center Historic District |
| Merriam, M.H. and Company |
| Merrimack Associates Building |
| Metropolitan District Commission Stable |
| Middleborough Center Historic District |
| Middleborough Waterworks |
| Middlefield Center Historic District |
| Middlesex Fells Reservation Parkways |
| Middlesex Fells Reservoirs Historic District |
| Millers Falls Village Historic District |
| Millicent Library |
| Millis Center Historic District |
| Mills-Hale-Owen Blocks |
| Milton Cemetery |
| Milton Centre Historic District |
| Milton Hill Historic District |
| Mission Hill Triangle Historic District |
| Monadnock Road Historic District |
| Montague Center Historic District |
| Montrose, The |
| Montville Baptist Church |
| Monument Park Historic District |
| Monument Square Historic District |
| Monument Square Historic District |
| Moody Street Fire Station |
| Moody Street Historic District |
| Moore-Hill House |
| Moore House |
| Moore's Corner Historic District |
| Moran Square Historic District |
| Moreland Street Historic District |
| Moreland Terrace Historic District |
| Morse-Barber House |
| Morse, Daniel, III, House |
| Morse-Tay-Leland-Hawes House |
| Morton Road Historic District |
| Morton Street, Metropolitan Park System of Greater Boston |
| Mount Feake Cemetery |
| Mount Pleasant |
| Mount Pleasant Cemetery |
| Mount Pleasant Historic District |
| Mount Vernon Cemetery |
| Mount Wollaston Cemetery |
| Mt. Prospect School for Boys |
| Mt. Vernon Street Historic District |
| Municipal Group Historic District |
| Munroe Building |
| Munroe, Sarah, Three-Decker |
| Murphy, Patrick, Three-Decker |
| Myrtle Baptist Church Neighborhood Historic District |
| Myrtle Street School |
| Mystic Gatehouse |
| Mystic Water Works |
| Nahant Civic Historic District |
| Nashawannuck Mills Historic District |
| Nazing Court Apartments |
| Needham Town Hall Historic District |
| Nelson, Christina, Three-Decker |
| Nelson, John R., House |
| Neponset Valley Parkway, Metorpolitan Park System of Greater Boston |
| Newcomb, John, House |
| New England Telephone Building |
| Newton, Azariah, House |
| Newton Centre Branch Library |
| Newton City Hall and War Memorial |
| Newton, Edward B., School |
| Newton Highlands Historic District |
| Newton Street Bridge |
| Newton Street School |
| Newtonville Historic District |
| Niles, Louville, House |
| Nobility Hill Historic District |
| Normal School Historic District |
| North Attleborough Town Center Historic District |
| North Avenue Rural Historic District |
| North Bellingham Cemetery and Oak Hill Cemetery |
| Northbound and Southbound Stations |
| North Brookfield Town House |
| North Canal Historic District |
Data from United States Park Service and Wikidata
