- Calabogie
- Caledon
- Cambridge
- Casselman
- Cochrane
- Carleton Place
- Chatham-Kent
- Clarence-Rockland
- Cobalt
- Cobourg
- Collingwood
- Cornwall
- Cadmus
- Caintown
- Cairngorm
- Cairo
- Caistor Centre
- Caistorville
- Calderwood
- Caledon
- Caledonia
- California
- California
- Caliper Lake
- Callander
- Calton
- Camel Chute
- Camelot Beach
- Cameron
- Camp Island