M
- (Ottawa) Mohr Corners
- (Hastings County) Moira
- (Thunder Bay District) Mokomon
- (Bruce County) Moltke
- (Wellington County) Monck
- (Hastings County) Monck Road
- (Hastings County) Moneymore
- (Perth County) Monkton
- (Hastings County) Monteagle
- (Hastings County) Monteagle Valley
- (Dufferin County) Monticello
- (Manitoulin District) Monument Corner
- (Bruce County) Monument Corners
- (Cochrane District) Moonbeam
- (Ottawa) Mooneys Bay
- (District Municipality of Muskoka) Moon River
- (Simcoe County) Moons Beach
- (Frontenac County) Moons Corners
- (Simcoe County) Moonstone
- (Lambton County) Moore Centre
- (Haliburton County) Moore Falls
- (Rainy River District) Moore Island
- (Grey County) Mooresburg
- (Ottawa) Moores Corners
- (Renfrew County) Moores Lake
- (Middlesex County) Mooresville
- (Cochrane District) Moose Island
- (Middlesex County) Moray
- (Regional Municipality of Niagara) Morgans Point
- (Northumberland County) Morganston