Barrios de Massachusetts M
- Magoun Square (28)
- Main Middle (2)
- Malden Center (24)
- Maplewood (67)
- Marblehead (13)
- Marina Bay (16)
- Maynard (4)
- McKnight (1)
- Medford Hillside (166)
- Meeting House Hill (20)
- Melrose East Side (1)
- Melrose Highlands (6)
- Memorial Square (2)
- Merrimac (1)
- Merrymount (3)
- Methuen (10)
- Metro West (46)
- Metropolitan Hill-Beech St (2)
- Mid-Cambridge (337)
- Middleton (2)
- Mill Pond (3)
- Milton (5)
- Mishawum (17)
- Mission Hill (2369)
- MIT (1)
- Montclair (17)
- Mount Vernon (2)