Cities
- Caledon ON
- Caledonia ON
- Cambridge ON
- Campbellford ON
- Campbellton ON
- Carman ON
- Casselman ON
- Chalk River ON
- Chatham-Kent ON
- Chatsworth ON
- Chesley ON
- Chesterville ON
- Clarence Creek ON
- Clarington ON
- Clearwater ON
- Clinton ON
- Coaticook QC
- Cobden ON
- Cobourg ON
- Colborne ON
- Coldwater ON
- Collingwood ON
- Conestogo ON
- Cornwall ON
- Corunna ON
- Courtice ON
- Cranbrook ON
- Creemore ON
- Crofton ON
- Curve Lake ON