- Maberly
- MacDonald Bay
- MacDonald Beach
- Maceys Bay
- Macksville
- MacLennan
- MacTier
- Macton
- Madawaska
- Madoc
- Maecks Subdivision
- Mafeking
- Magnetawan
- Magnetic Island
- Main Duck Island
- Mainsville
- Maitland
- Malahide
- Malakoff
- Malcolm
- Malone
- Manhard
- Manion Corners
- Manitouwadge
- Manitowaning
- Mannheim
- Manor Park
- Manordale
- Manotick Station
- Mansfield