Barrios de Massachusetts M
- Magoun Square (101)
- Main Middle (3)
- Malden Center (208)
- Maplewood (117)
- Marina Bay (23)
- McKnight (2)
- Medford Hillside (144)
- Meeting House Hill (39)
- Melrose East Side (8)
- Melrose Highlands (21)
- Memorial Square (1)
- Merrymount (1)
- Metro West (61)
- Metropolitan Hill-Beech St (2)
- Mid-Cambridge (512)
- Mill Pond (5)
- Mishawum (5)
- Mission Hill (2852)
- Montclair (27)
- Mount Vernon (4)