Massachusetts - Criteria: A (event)
| Morewood School |
| Morgan Block |
| Morse, Amos, House |
| Morse-Barber House |
| Morse, Daniel, III, House |
| Morse, H., House |
| Morse-Tay-Leland-Hawes House |
| Morton Road Historic District |
| Morton Street, Metropolitan Park System of Greater Boston |
| Moswetuset Hummock |
| Mountain Rest |
| Mount Auburn Cemetery Reception House |
| Mount Feake Cemetery |
| Mount Greylock Summit Historic District |
| Mount Hope Cemetery |
| Mount Pleasant Cemetery |
| Mount Pleasant Historic District |
| Mount Vernon Cemetery |
| Mount Wollaston Cemetery |
| Mowers' Block |
| Mt. Prospect School for Boys |
| Mt. Vernon Street Historic District |
| Municipal Group Historic District |
| Munroe Building |
| Munroe, Sarah, Three-Decker |
| Munroe Street Historic District |
| Murdock School |
| Murphy, Patrick, Three-Decker |
| Musketaquid Mills |
| Muttock Historic and Archeological District |
| Myrtle Baptist Church Neighborhood Historic District |
| Myrtle Street School |
| Mystic Gatehouse |
| Mystic Valley Parkway, Metropolitan Park System of Greater Boston MPS |
| Nahant Beach Boulevard-Metropolitan Park System of Greater Boston |
| Nahant Civic Historic District |
| Nahant Life-Saving Station |
| Nantucket Historic District |
| Narragansett Mills |
| Nashawannuck Mills Historic District |
| Natick Center Historic District |
| Nauset Beach Light |
| Naval Hospital Boston Historic District |
| Nazing Court Apartments |
| Ned Point Light |
| Needham Town Hall Historic District |
| Nelson, Christina, Three-Decker |
| Nelson, John R., House |
| Neponset Valley Parkway, Metorpolitan Park System of Greater Boston |
| New Bay Diner Restaurant |
| New Bedford Gas and Edison Light Complex |
| New Bedford Historic District |
| New Boston Inn |
| Newbury Historic District |
| Newburyport Harbor Front Range Light |
| Newburyport Harbor Light |
| Newburyport Harbor Rear Range Light |
| Newburyport Historic District |
| Newcomb, John, House |
| Newell Farm |
| New England Confectionery Company Factory |
| New England Conservatory of Music |
| New England Telephone Building |
| New Hampshire, The |
| New Marlborough Village |
| New Riding Club |
| Newspaper Row |
| Newton, Azariah, House |
| Newton Centre Branch Library |
| Newton City Hall and War Memorial |
| Newton Cottage Hospital Historic District |
| Newton, Edward B., School |
| Newton Highlands Historic District |
| Newton Lower Falls Historic District |
| Newton Street Bridge |
| Newton Street Railway Carbarn |
| Newton Street School |
| Newton Theological Institution Historic District |
| Newton Upper Falls Historic District |
| New York, New Haven & Hartford Passenger Depot |
| Nichols, Daniel, Homestead |
| Nichols, James, House |
| Nightengale, Solomon, House |
| Niles, Louville, House |
| Nix's Mate Daybeacon |
| No. 4 Schoolhouse |
| Nobility Hill Historic District |
| Nobska Point Light Station |
| Norad Mill |
| Norcross, William, House |
| Norfolk County Courthouse |
| Norfolk Grange Hall |
| Normal School Historic District |
| North Abington Depot |
| North Amherst Center Historic District |
| Northampton Downtown Historic District |
| Northampton State Hospital |
| Northampton Veterans Administration Hospital Historic District |
| North Andover Center Historic District |
| North Attleborough Town Center Historic District |
Data from United States Park Service and Wikidata
