C
- Cabin Creek
- Caddoa
- Cahone
- Calcite
- Calhan
- Calhoun
- Camden
- Cameo
- Campbelltown
- Camp Bird
- Campion
- Campo
- Camp St Malo
- Canfield
- Canon
- Canon City
- Canton
- Capulin
- Carbonate
- Carbondale
- Carbonera
- Carbon Junction
- Cardiff
- Caribou City
- Carlton
- Carr
- Carracas
- Carriage Club
- Carrizo Springs
- Carson
- Carterville
- Casa
- Cascade
- Castle Pines
- Castle Rock
- Castlewood
- Cathedral
- Catherine
- Cattle Creek
- Cedar Cove
- Cedar Creek
- Cedar Crest
- Cedaredge
- Cedar Grove
- Cedar Point
- Cedarwood
- Centennial
- Center
- Centerville
- Central City
- Centro
- Chacra
- Chama
- Champion Mill
- Chance
- Channing
- Chatfield Acres
- Chattanooga
- Cheraw
- Cherry Hills
- Cherry Hills Village
- Chester
- Cheyenne Wells
- Chimney Rock
- Chipeta
- Chipita Park
- Chivingston
- Chivington
- Chromo
- Cimarron
- Cimarron Hills
- Clark
- Clarkville
- Cleora
- Cliffdale
- Clifford
- Clifton
- Climax
- Cloverly
- Coal Creek
- Coal Creek
- Coaldale
- Coalmont
- Coburn
- Codo
- Cokedale
- Coke Ovens
- Cold Spring
- Collbran
- Colona
- Colorado City
- Colorado Sierra
- Colorado Springs
- Columbine
- Columbine
- Columbine Valley
- Columbus
- Comanche
- Comer
- Commerce City
- Como
- Concrete
- Conejos
- Conifer
- Cooper
- Cope
- Copper Mountain
- Copper Spur
- Cordova
- Cornish
- Cortez
- Cory
- Cotopaxi
- Cottonwood
- Country Haven
- Coventry
- Cowdrey
- Cozy Corner
- Craig
- Craig Place
- Craig South Highlands
- Crawford
- Creede
- Crescent
- Crested Butte
- Crestone
- Cripple Creek
- Crisman
- Critchell
- Crook
- Cross Mountain
- Crossons
- Crow
- Crowley
- Crystal
- Crystola
- Cuchara
- Cuchara Junction
- Cuerna Verde Park
- Cumbres