- Mapleview
- Maplewood
- Mar Wey Mobile Home Park
- Marble
- Marcell
- March
- Margie
- Marian Island
- Maries Island
- Marietta
- Marine on Saint Croix
- Marine on Saint Croix
- Marion
- Markham
- Markville
- Marna
- Marr Island
- Marrier Estates
- Marshall
- Martin Island
- Martin Lake
- Martin Landing
- Martinson Island
- Marty
- Marysburg
- Marystown
- Matawan
- Matson Island
- Mattson
- Mavie