C
- (Rainy River District) Crozier
- (Grey County) Cruickshank
- (United Counties of Leeds and Grenville) Crystal
- (Ottawa) Crystal Bay
- (Ottawa) Crystal Beach
- (Peterborough County) Crystal Springs
- (Simcoe County) Cumberland Beach
- (Ottawa) Cummings Island
- (Wellington County) Cumnock
- (Oxford County) Curries
- (Ottawa) Cyrville
- (Bruce County) Chesley
- (Haliburton County) Cardiff
- Casselman
- (Greater Sudbury) Capreol
- Carleton Place
- Cobourg
- Clarence-Rockland
- Collingwood
- (Chatham-Kent) Chatham
- Cornwall
- (Peel) Caledon
- Chatham-Kent
- Cambridge