Barrios de Massachusetts M
- Magoun Square (91)
- Main Middle (5)
- Malden Center (53)
- Maplewood (63)
- Marina Bay (9)
- McKnight (4)
- Medford Hillside (97)
- Meeting House Hill (42)
- Melrose East Side (5)
- Melrose Highlands (10)
- Memorial Square (2)
- Merrymount (4)
- Metro West (73)
- Metropolitan Hill-Beech St (2)
- Mid-Cambridge (358)
- Mill Pond (6)
- Mishawum (3)
- Mission Hill (1578)
- Montclair (9)
- Mount Vernon (5)