- Merrow Landing
- Merrymeeting Trailer Park
- Middle Island
- Mile Island
- Millstone Island
- Ministerial Island
- Morrills Corner
- Mosher Corner
- Moshier Island
- Mosquito Island
- Mountainview Park
- Munjoy Hill
- MacQuillis Corner
- Macy
- Madrid Junction
- Mingo Springs
- Mooselookmeguntic
- Mountainview
- Mahoney Island
- Manset
- Mark Island
- Mark Island
- Marks Corner
- Marlboro
- Marshall Island
- Mary Jane Island
- McGlathery Island
- Mile Island
- Mill Island
- Millet Island