M
- Maguire
- Malcolm
- Maple Grove
- Marlbank (partial)
- Maynooth Station
- Millbridge
- Millbridge Station
- Mille Roches
- Milnet
- Moiles Mills
- Monsell
- Moulinette
- Mount Healey
- Mount Horeb
- Mulock
- Murphy's Corners
Read more about this topic: List Of Ghost Towns In Ontario