Barrios de Massachusetts M
- Magoun Square (95)
- Main Middle (2)
- Malden Center (177)
- Maplewood (98)
- Marina Bay (17)
- McKnight (5)
- Medford Hillside (145)
- Meeting House Hill (43)
- Melrose East Side (5)
- Melrose Highlands (13)
- Memorial Square (1)
- Merrymount (2)
- Metro West (58)
- Metropolitan Hill-Beech St (2)
- Mid-Cambridge (464)
- Mill Pond (3)
- Mishawum (4)
- Mission Hill (2594)
- Montclair (25)
- Mount Vernon (4)