C
- (Durham) Cannington
- (Frontenac County) Canonto
- (Bruce County) Cape Chin
- (Bruce County) Cape Chin North
- (Bruce County) Cape Chin South
- (Middlesex County) Caradoc
- (Ottawa) Cardinal Heights
- (Bruce County) Cargill
- (Thunder Bay District) Caribou Island
- (Ottawa) Carleton Heights
- (Ottawa) Carleton Square
- (Simcoe County) Carley
- (Parry Sound District) Carling
- (Perth County) Carlingford
- (Ottawa) Carlington
- (Ottawa) Carlingwood
- (Huron County) Carlow
- (Ottawa) Carlsbad Springs
- (Simcoe County) Carlyon
- (Northumberland County) Carmel
- (Peterborough County) Carmel
- (Perth County) Carmunnock
- (Haliburton County) Carnarvon
- (Durham) Carnegie Beach
- (Ottawa) Carp
- (Ottawa) Carsonby
- (Ottawa) Carson Grove
- (Thunder Bay District) Carters Corners
- (Algoma) Carterton
- (Perth County) Carthage