- Cabarton
- Cabinet
- Cable Car Crossing
- Cache
- Calder
- Caldwell
- Calendar
- Camas
- Cambridge
- Cambridge
- Cameron
- Camp Creek Summer Home Area
- Canfield
- Canyon
- Carbon Center
- Cardiff
- Cardiff Mill
- Cardwell
- Carey
- Careywood
- Caribel
- Carmen
- Carrietown
- Cascade
- Castle Rocks
- Castleford
- Casto
- Cataldo
- Cathedral Pines
- Cavendish