- Malden Island
- Mallars Island
- Man Island
- Manana Island
- Manchester
- Manks Corner
- Manley Island
- Mannings Farm
- Manset
- Manson Corner
- Maple Grove
- Maple Ridge Island
- Mapleton
- Maplewood
- Maranacook
- Marblehead Island
- Margie Rock
- Margison
- Mariaville
- Mariner
- Marion
- Marion Island
- Mark Island
- Mark Island
- Mark Island
- Mark Island
- Marks Corner
- Marks Island
- Marlboro
- Marr Island