- Cornish
- Cory
- Cotopaxi
- Cowdrey
- Crescent
- Crystola
- Cuchara
- Columbine
- Columbine Valley
- Commerce City
- Carriage Club (historical)
- Castle Oaks
- Castle Pines Village
- Castlewood North
- Cherry Creek Highlands
- Clarke Farms
- Country Acres
- Crestview
- Carterville
- Copper Spur
- Cedar Point
- Cimarron
- Creede
- Cascade-Chipita Park
- Chipita Park
- Crested Butte
- Crestone
- Cripple Creek
- Crook
- Cañon City