Barrios de Massachusetts M
- Magoun Square (54)
- Main Middle (5)
- Malden Center (25)
- Maplewood (54)
- Marina Bay (9)
- McKnight (6)
- Medford Hillside (97)
- Meeting House Hill (30)
- Melrose East Side (2)
- Melrose Highlands (8)
- Memorial Square (2)
- Merrymount (4)
- Metro West (71)
- Metropolitan Hill-Beech St (2)
- Mid-Cambridge (290)
- Mill Pond (4)
- Mishawum (10)
- Mission Hill (964)
- Montclair (20)
- Mount Vernon (3)