Barrios de Massachusetts M
- Magoun Square (101)
- Main Middle (4)
- Malden Center (102)
- Maplewood (101)
- Marina Bay (16)
- McKnight (1)
- Medford Hillside (97)
- Meeting House Hill (57)
- Melrose East Side (6)
- Melrose Highlands (21)
- Memorial Square (1)
- Merrymount (3)
- Metro West (44)
- Metropolitan Hill-Beech St (2)
- Mid-Cambridge (502)
- Mill Pond (6)
- Mishawum (3)
- Mission Hill (2216)
- Montclair (18)
- Mount Vernon (2)