Below are the list Colorado state area codes by city and county listed by alphabetical order. Find Colorado area codes by city or lookup which cities belong to an area code. Colorado area codes includes 303, 719, 970.
List of Colorado Area Codes
| City | County | Area Code | City | County | Area Code |
|---|---|---|---|---|---|
| Arvada | Jefferson County | 303 | Delta | Delta County | 970 |
| Aurora | Adams County | 303 | Dillon | Summit County | 970 |
| Aurora | Arapahoe County | 303 | Dinosaur | Moffat County | 970 |
| Bennett | Arapahoe County | 303 | Dolores | Montezuma County | 970 |
| Black Hawk | Gilpin County | 303 | Dove Creek | Dolores County | 970 |
| Boulder | Boulder County | 303 | Drake | Larimer County | 970 |
| Broomfield | Broomfield County | 303 | Durango | La Plata County | 970 |
| Buffalo Creek | Jefferson County | 303 | Eagle | Eagle County | 970 |
| Byers | Arapahoe County | 303 | Eaton | Weld County | 970 |
| Castle Rock | Douglas County | 303 | Eckert | Delta County | 970 |
| Central City | Gilpin County | 303 | Eckley | Yuma County | 970 |
| Commerce City | Adams County | 303 | Edwards | Eagle County | 970 |
| Conifer | Jefferson County | 303 | Egnar | San Miguel County | 970 |
| Dacono | Weld County | 303 | Estes Park | Larimer County | 970 |
| Denver | Denver County | 303 | Evans | Weld County | 970 |
| Denver | Arapahoe County | 303 | Fleming | Logan County | 970 |
| Dumont | Clear Creek County | 303 | Fort Collins | Larimer County | 970 |
| Dupont | Adams County | 303 | Fraser | Grand County | 970 |
| Eastlake | Adams County | 303 | Frisco | Summit County | 970 |
| Eldorado Springs | Boulder County | 303 | Fruita | Mesa County | 970 |
| Elizabeth | Elbert County | 303 | Galeton | Weld County | 970 |
| Empire | Clear Creek County | 303 | Gateway | Mesa County | 970 |
| Englewood | Arapahoe County | 303 | Gilcrest | Weld County | 970 |
| Evergreen | Jefferson County | 303 | Glade Park | Mesa County | 970 |
| Firestone | Weld County | 303 | Glen Haven | Larimer County | 970 |
| Frederick | Weld County | 303 | Glenwood Springs | Garfield County | 970 |
| Georgetown | Clear Creek County | 303 | Granby | Grand County | 970 |
| Golden | Jefferson County | 303 | Grand Junction | Mesa County | 970 |
| Grant | Park County | 303 | Grand Lake | Grand County | 970 |
| Hudson | Weld County | 303 | Greeley | Weld County | 970 |
| Hygiene | Boulder County | 303 | Grover | Weld County | 970 |
| Indian Hills | Jefferson County | 303 | Gunnison | Gunnison County | 970 |
| Jamestown | Boulder County | 303 | Gypsum | Eagle County | 970 |
| Keenesburg | Weld County | 303 | Haxtun | Phillips County | 970 |
| Kiowa | Elbert County | 303 | Hayden | Routt County | 970 |
| Kittredge | Jefferson County | 303 | Hereford | Weld County | 970 |
| Littleton | Arapahoe County | 303 | Hesperus | La Plata County | 970 |
| Longmont | Boulder County | 303 | Hillrose | Morgan County | 970 |
| Louisville | Boulder County | 303 | Holyoke | Phillips County | 970 |
| Louviers | Douglas County | 303 | Hot Sulphur Springs | Grand County | 970 |
| Lyons | Boulder County | 303 | Hotchkiss | Delta County | 970 |
| Nederland | Boulder County | 303 | Idalia | Yuma County | 970 |
| Niwot | Boulder County | 303 | Ignacio | La Plata County | 970 |
| Pine | Jefferson County | 303 | Iliff | Logan County | 970 |
| Pinecliffe | Boulder County | 303 | Joes | Yuma County | 970 |
| Roggen | Weld County | 303 | Johnstown | Weld County | 970 |
| Rollinsville | Gilpin County | 303 | Kersey | Weld County | 970 |
| Shawnee | Park County | 303 | Kirk | Yuma County | 970 |
| Silver Plume | Clear Creek County | 303 | Kremmling | Grand County | 970 |
| Strasburg | Adams County | 303 | La Salle | Weld County | 970 |
| Ward | Boulder County | 303 | Lake City | Hinsdale County | 970 |
| Watkins | Adams County | 303 | Laporte | Larimer County | 970 |
| Westminster | Jefferson County | 303 | Lazear | Delta County | 970 |
| Wheat Ridge | Jefferson County | 303 | Lewis | Montezuma County | 970 |
| Agate | Elbert County | 719 | Livermore | Larimer County | 970 |
| Aguilar | Las Animas County | 719 | Log Lane Village | Morgan County | 970 |
| Alamosa | Alamosa County | 719 | Loma | Mesa County | 970 |
| Alma | Park County | 719 | Loveland | Larimer County | 970 |
| Antonito | Conejos County | 719 | Lucerne | Weld County | 970 |
| Arapahoe | Cheyenne County | 719 | Mack | Mesa County | 970 |
| Arlington | Kiowa County | 719 | Mancos | Montezuma County | 970 |
| Arriba | Lincoln County | 719 | Marvel | La Plata County | 970 |
| Avondale | Pueblo County | 719 | Masonville | Larimer County | 970 |
| Bethune | Kit Carson County | 719 | Mc Coy | Eagle County | 970 |
| Beulah | Pueblo County | 719 | Mead | Weld County | 970 |
| Blanca | Costilla County | 719 | Meeker | Rio Blanco County | 970 |
| Boncarbo | Las Animas County | 719 | Meredith | Pitkin County | 970 |
| Boone | Pueblo County | 719 | Merino | Logan County | 970 |
| Branson | Las Animas County | 719 | Mesa | Mesa County | 970 |
| Buena Vista | Chaffee County | 719 | Mesa Verde National Park | Montezuma County | 970 |
| Calhan | El Paso County | 719 | Milliken | Weld County | 970 |
| Campo | Baca County | 719 | Minturn | Eagle County | 970 |
| Canon City | Fremont County | 719 | Molina | Mesa County | 970 |
| Capulin | Conejos County | 719 | Montrose | Montrose County | 970 |
| Cascade | El Paso County | 719 | Naturita | Montrose County | 970 |
| Center | Saguache County | 719 | New Castle | Garfield County | 970 |
| Chama | Costilla County | 719 | New Raymer | Weld County | 970 |
| Cheraw | Otero County | 719 | Norwood | San Miguel County | 970 |
| Cheyenne Wells | Cheyenne County | 719 | Nucla | Montrose County | 970 |
| Climax | Lake County | 719 | Nunn | Weld County | 970 |
| Coal Creek | Fremont County | 719 | Oak Creek | Routt County | 970 |
| Coaldale | Fremont County | 719 | Ohio City | Gunnison County | 970 |
| Colorado City | Pueblo County | 719 | Olathe | Montrose County | 970 |
| Colorado Springs | El Paso County | 719 | Ophir | San Miguel County | 970 |
| Como | Park County | 719 | Orchard | Morgan County | 970 |
| Conejos | Conejos County | 719 | Otis | Washington County | 970 |
| Cotopaxi | Fremont County | 719 | Ouray | Ouray County | 970 |
| Creede | Mineral County | 719 | Ovid | Sedgwick County | 970 |
| Crestone | Saguache County | 719 | Padroni | Logan County | 970 |
| Cripple Creek | Teller County | 719 | Pagosa Springs | Archuleta County | 970 |
| Crowley | Crowley County | 719 | Palisade | Mesa County | 970 |
| Del Norte | Rio Grande County | 719 | Paoli | Phillips County | 970 |
| Divide | Teller County | 719 | Paonia | Delta County | 970 |
| Eads | Kiowa County | 719 | Parachute | Garfield County | 970 |
| Florence | Fremont County | 719 | Paradox | Montrose County | 970 |
| Florissant | Teller County | 719 | Parlin | Gunnison County | 970 |
| Fort Garland | Costilla County | 719 | Parshall | Grand County | 970 |
| Fort Lyon | Bent County | 719 | Peetz | Logan County | 970 |
| Fountain | El Paso County | 719 | Phippsburg | Routt County | 970 |
| Fowler | Otero County | 719 | Pierce | Weld County | 970 |
| Gardner | Huerfano County | 719 | Pitkin | Gunnison County | 970 |
| Genoa | Lincoln County | 719 | Placerville | San Miguel County | 970 |
| Granada | Prowers County | 719 | Pleasant View | Montezuma County | 970 |
| Green Mountain Falls | El Paso County | 719 | Powderhorn | Gunnison County | 970 |
| Guffey | Park County | 719 | Rand | Jackson County | 970 |
| Hartman | Prowers County | 719 | Rangely | Rio Blanco County | 970 |
| Hartsel | Park County | 719 | Red Cliff | Eagle County | 970 |
| Hasty | Bent County | 719 | Red Feather Lakes | Larimer County | 970 |
| Haswell | Kiowa County | 719 | Redvale | Montrose County | 970 |
| Hillside | Fremont County | 719 | Rico | Dolores County | 970 |
| Hoehne | Las Animas County | 719 | Ridgway | Ouray County | 970 |
| Holly | Prowers County | 719 | Rifle | Garfield County | 970 |
| Homelake | Rio Grande County | 719 | Sedgwick | Sedgwick County | 970 |
| Hooper | Alamosa County | 719 | Seibert | Kit Carson County | 970 |
| Howard | Fremont County | 719 | Severance | Weld County | 970 |
| Hugo | Lincoln County | 719 | Silt | Garfield County | 970 |
| Jaroso | Costilla County | 719 | Silverthorne | Summit County | 970 |
| Jefferson | Park County | 719 | Silverton | San Juan County | 970 |
| Karval | Lincoln County | 719 | Slater | Moffat County | 970 |
| Kim | Las Animas County | 719 | Snowmass | Pitkin County | 970 |
| Kit Carson | Cheyenne County | 719 | Snowmass Village | Pitkin County | 970 |
| La Jara | Conejos County | 719 | Snyder | Morgan County | 970 |
| La Junta | Otero County | 719 | Somerset | Gunnison County | 970 |
| La Veta | Huerfano County | 719 | Steamboat Springs | Routt County | 970 |
| Lake George | Park County | 719 | Sterling | Logan County | 970 |
| Lamar | Prowers County | 719 | Stoneham | Weld County | 970 |
| Las Animas | Bent County | 719 | Tabernash | Grand County | 970 |
| Limon | Lincoln County | 719 | Telluride | San Miguel County | 970 |
| Manassa | Conejos County | 719 | Timnath | Larimer County | 970 |
| Manitou Springs | El Paso County | 719 | Toponas | Routt County | 970 |
| Manzanola | Otero County | 719 | Towaoc | Montezuma County | 970 |
| Matheson | Elbert County | 719 | Vail | Eagle County | 970 |
| Mc Clave | Bent County | 719 | Vernon | Yuma County | 970 |
| Moffat | Saguache County | 719 | Vona | Kit Carson County | 970 |
| Monarch | Chaffee County | 719 | Walden | Jackson County | 970 |
| Monte Vista | Rio Grande County | 719 | Weldona | Morgan County | 970 |
| Mosca | Alamosa County | 719 | Wellington | Larimer County | 970 |
| Nathrop | Chaffee County | 719 | Whitewater | Mesa County | 970 |
| Olney Springs | Crowley County | 719 | Wiggins | Morgan County | 970 |
| Ordway | Crowley County | 719 | Windsor | Weld County | 970 |
| Palmer Lake | El Paso County | 719 | Winter Park | Grand County | 970 |
| Penrose | Fremont County | 719 | Wolcott | Eagle County | 970 |
| Peyton | El Paso County | 719 | Woodrow | Washington County | 970 |
| Poncha Springs | Chaffee County | 719 | Woody Creek | Pitkin County | 970 |
| Pritchett | Baca County | 719 | Wray | Yuma County | 970 |
| Pueblo | Pueblo County | 719 | Yampa | Routt County | 970 |
| Ramah | El Paso County | 719 | Yellow Jacket | Montezuma County | 970 |
| Rockvale | Fremont County | 719 | Yuma | Yuma County | 970 |
| Rocky Ford | Otero County | 719 | Elbert | Elbert County | 303,719 |
| Romeo | Conejos County | 719 | Allenspark | Boulder County | 303,720 |
| Rush | Lincoln County | 719 | Arvada | Jefferson County | 303,720 |
| Rye | Pueblo County | 719 | Aurora | Arapahoe County | 303,720 |
| Saguache | Saguache County | 719 | Boulder | Boulder County | 303,720 |
| Salida | Chaffee County | 719 | Brighton | Adams County | 303,720 |
| San Luis | Costilla County | 719 | Broomfield | Broomfield County | 303,720 |
| San Pablo | Costilla County | 719 | Castle Rock | Douglas County | 303,720 |
| Sanford | Costilla County | 719 | Commerce City | Adams County | 303,720 |
| Sargents | Saguache County | 719 | Denver | Denver County | 303,720 |
| Sheridan Lake | Kiowa County | 719 | Denver | Jefferson County | 303,720 |
| Simla | Elbert County | 719 | Denver | Adams County | 303,720 |
| South Fork | Rio Grande County | 719 | Denver | Arapahoe County | 303,720 |
| Springfield | Baca County | 719 | Englewood | Arapahoe County | 303,720 |
| Sugar City | Crowley County | 719 | Erie | Weld County | 303,720 |
| Swink | Otero County | 719 | Franktown | Douglas County | 303,720 |
| Trinchera | Las Animas County | 719 | Golden | Jefferson County | 303,720 |
| Trinidad | Las Animas County | 719 | Idaho Springs | Clear Creek County | 303,720 |
| Twin Lakes | Lake County | 719 | Littleton | Arapahoe County | 303,720 |
| Two Buttes | Baca County | 719 | Littleton | Denver County | 303,720 |
| U S A F Academy | El Paso County | 719 | Littleton | Jefferson County | 303,720 |
| Victor | Teller County | 719 | Littleton | Douglas County | 303,720 |
| Vilas | Baca County | 719 | Lone Tree | Douglas County | 303,720 |
| Villa Grove | Saguache County | 719 | Louisville | Boulder County | 303,720 |
| Walsenburg | Huerfano County | 719 | Morrison | Jefferson County | 303,720 |
| Walsh | Baca County | 719 | Parker | Douglas County | 303,720 |
| Westcliffe | Custer County | 719 | Sedalia | Douglas County | 303,720 |
| Weston | Las Animas County | 719 | Thornton | Adams County | 303,720 |
| Wetmore | Custer County | 719 | Westminster | Adams County | 303,720 |
| Wild Horse | Cheyenne County | 719 | Wheat Ridge | Jefferson County | 303,720 |
| Wiley | Prowers County | 719 | Fort Lupton | Weld County | 303,970 |
| Woodland Park | Teller County | 719 | Julesburg | Sedgwick County | 308,970 |
| Yoder | El Paso County | 719 | Monument | El Paso County | 719,303 |
| Aurora | Arapahoe County | 720 | Woodland Park | Teller County | 719,303 |
| Denver | Denver County | 720 | Colorado Springs | El Paso County | 719,720 |
| Akron | Washington County | 970 | Burlington | Kit Carson County | 719,970 |
| Almont | Gunnison County | 970 | Fairplay | Park County | 719,970 |
| Amherst | Phillips County | 970 | Flagler | Kit Carson County | 719,970 |
| Anton | Washington County | 970 | Leadville | Lake County | 719,970 |
| Arboles | Archuleta County | 970 | Stratton | Kit Carson County | 719,970 |
| Aspen | Pitkin County | 970 | Arvada | Jefferson County | 720,303 |
| Atwood | Logan County | 970 | Aurora | Arapahoe County | 720,303 |
| Ault | Weld County | 970 | Bailey | Park County | 720,303 |
| Austin | Delta County | 970 | Boulder | Boulder County | 720,303 |
| Avon | Eagle County | 970 | Brighton | Adams County | 720,303 |
| Basalt | Eagle County | 970 | Broomfield | Jefferson County | 720,303 |
| Battlement Mesa | Garfield County | 970 | Denver | Denver County | 720,303 |
| Bayfield | La Plata County | 970 | Denver | Jefferson County | 720,303 |
| Bedrock | Montrose County | 970 | Denver | Adams County | 720,303 |
| Bellvue | Larimer County | 970 | Denver | Arapahoe County | 720,303 |
| Bond | Eagle County | 970 | Englewood | Arapahoe County | 720,303 |
| Briggsdale | Weld County | 970 | Henderson | Adams County | 720,303 |
| Brush | Morgan County | 970 | Idledale | Jefferson County | 720,303 |
| Burns | Eagle County | 970 | Lafayette | Boulder County | 720,303 |
| Cahone | Dolores County | 970 | Littleton | Douglas County | 720,303 |
| Carbondale | Pitkin County | 970 | Littleton | Jefferson County | 720,303 |
| Carr | Weld County | 970 | Littleton | Arapahoe County | 720,303 |
| Cedaredge | Delta County | 970 | Longmont | Boulder County | 720,303 |
| Chimney Rock | Archuleta County | 970 | Parker | Douglas County | 720,303 |
| Chromo | Archuleta County | 970 | Berthoud | Larimer County | 970,303 |
| Cimarron | Gunnison County | 970 | Breckenridge | Summit County | 970,303 |
| Clark | Routt County | 970 | Fort Morgan | Morgan County | 970,303 |
| Clifton | Mesa County | 970 | Greeley | Weld County | 970,303 |
| Coalmont | Jackson County | 970 | Loveland | Larimer County | 970,303 |
| Collbran | Mesa County | 970 | Platteville | Weld County | 970,303 |
| Cope | Washington County | 970 | Maybell | Moffat County | 970,435 |
| Cortez | Montezuma County | 970 | Lindon | Washington County | 970,719 |
| Cory | Delta County | 970 | Evergreen | Jefferson County | 303,720,970 |
| Cowdrey | Jackson County | 970 | Littleton | Arapahoe County | 303,720,970 |
| Craig | Moffat County | 970 | Deer Trail | Arapahoe County | 303,970,719 |
| Crawford | Montrose County | 970 | Longmont | Weld County | 303,970,720 |
| Crested Butte | Gunnison County | 970 | Denver | Denver County | 720,303,719 |
| Crook | Logan County | 970 | Larkspur | Douglas County | 720,303,719 |
| De Beque | Garfield County | 970 | Longmont | Boulder County | 720,970,303 |
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