- Mendenhall Springs
- Midway
- Mulford
- Mulford Gardens
- Marklee Village
- Mayaro
- Merrills Landing
- Merrimac
- Manuel Mill
- McKay
- Meadowmont
- Melones
- Milton
- Mother Lode Acres
- Mountain Ranch Subdivision
- Mountain Retreat
- Mumbert Acres
- Mussel Rock
- Mussel Rock
- Millers Landing
- Mills Orchards
- Mad River
- Madeline
- Madison
- Malaga
- Maltby
- Manchester
- Marin City
- Marinwood
- Marshall