- Madaket
- Malden
- Manchester-by-the-Sea
- Mansfield
- Mansfield Center
- Marblehead
- Marion
- Marion Center
- Marlborough
- Marshfield
- Marshfield Hills
- Marstons Mills
- Mashpee
- Mashpee Neck
- Mattapoisett
- Mattapoisett Center
- Maynard
- Medfield
- Medford
- Medway
- Melrose
- Mendon
- Merrimac
- Methuen
- Middleboro
- Middleborough Center
- Middlefield
- Middleton
- Milford
- Millbury
- Millers Falls
- Millis
- Millis-Clicquot
- Millville
- Milton
- Monomoscoy Island
- Monson
- Monson Center
- Montague
- Monterey
- Montgomery
- Monument Beach
