- Martin Siding
- Mather Island
- Mavis Mills
- McCluskey
- McEwen
- McGrath Corner
- McGraw Brook
- McGraws Island
- McKendrick
- McKendrick Lake
- McKenna
- McKenzie Corner
- McLaughlin
- McLeods
- McManus Siding
- McMonagle Corner
- McNamee
- McNeish
- Medford
- Menneval
- Middle Hainesville
- Middle Island
- Middle River
- Milford
- Millbank
- Miller Line Cache
- Millerville
- Mineral
- Ministers Island
- Mink Island