- Mill Valley
- Moody Corner
- Mount Tom
- Mayo Corners
- Mill River
- Monroe Bridge
- Montague City
- Montague Station
- Moores Corner
- Morse Village
- Mount Hermon
- Mount Hermon Station
- Mount L
- Munns Ferry
- Mathies Manor
- McKnight and Bay
- Meadowbrook Green
- Merrick
- Mileoak Corner
- Mittineague
- Monson Center
- Mountain Park
- Mundale
- Malden Centre
- Malden Highlands
- Maplewood
- Marlborough Junction
- Meadowbrook Mobile Home Park
- Medford Hillside
- Melrose Highlands