M
- (Nipissing District) Murchison
- (Thunder Bay District) Murillo
- (Simcoe County) Murphy Beach
- (Hastings County) Murphy Corners
- (Peterborough County) Murray Hill
- (Frontenac County) Murvale
- (Hastings County) Musclow
- (Frontenac County) Myers Cave
- (Hastings County) Myrehall
- (Hastings County) Moffat Pond
- (Peterborough County) Mount Pleasant
- (Toronto county) Midtown Toronto
- (Haliburton County) Minden
- (Frontenac County) Marysville
- (Regional Municipality of Waterloo) Maryhill
- (Parry Sound District) Magnetawan
- (Grey County) Markdale
- (Bruce County) Mildmay
- Moosonee
- (Cochrane District) Moosonee
- (Hastings County) Madoc
- (Peterborough County) Millbrook
- (Thunder Bay District) Manitouwadge
- (Ottawa) Metcalfe
- (Middlesex County) Mount Brydges
- Mattawa
- (Regional Municipality of Niagara) Mississauga Beach
- Meaford
- Midland
- (Halton) Milton