Barrios de Massachusetts M
- Magoun Square (94)
- Main Middle (4)
- Malden Center (179)
- Maplewood (77)
- Marblehead (15)
- Marina Bay (22)
- Maynard (5)
- Medford Hillside (153)
- Meeting House Hill (36)
- Melrose East Side (6)
- Melrose Highlands (10)
- Memorial Square (1)
- Merrymount (4)
- Methuen (14)
- Metro West (70)
- Metropolitan Hill-Beech St (2)
- Mid-Cambridge (396)
- Mill Pond (2)
- Milton (11)
- Mishawum (4)
- Mission Hill (3172)
- MIT (1)
- Montclair (22)
- Mount Vernon (7)