- Columbine
- Columbine, Routt
- Columbus
- Comanche
- Comanche Creek
- Comer
- Como
- Concrete
- Conejos
- Conifer
- Cooper
- Cope
- Copper Mountain
- Copper Spur
- Copperdale
- Cordova Plaza
- Cornelia
- Cornish
- Cory
- Cotopaxi
- Cottonwood
- Cottonwood
- Country Acres
- Country West
- Coventry
- Cowdrey
- Craig Place
- Craig South Highlands
- Crescent
- Crescent Village