Colorado counties
Every county in Colorado, with the ZIP codes recorded in each. Pick one to see its full ZIP code list.
- counties
- 64
- ZIP codes
- 645
All Colorado counties
| County | ZIP codes | Largest city |
|---|---|---|
| Adams County | 26 | Aurora |
| Alamosa County | 4 | Alamosa |
| Arapahoe County | 28 | Aurora |
| Archuleta County | 4 | Pagosa Springs |
| Baca County | 6 | Campo |
| Bent County | 4 | Fort Lyon |
| Boulder County | 27 | Boulder |
| Broomfield County | 1 | Broomfield |
| Chaffee County | 6 | Buena Vista |
| Cheyenne County | 4 | Arapahoe |
| Clear Creek County | 5 | Dumont |
| Conejos County | 7 | Antonito |
| Costilla County | 5 | Blanca |
| Crowley County | 5 | Crowley |
| Custer County | 2 | Westcliffe |
| Delta County | 9 | Austin |
| Denver County | 55 | Denver |
| Dolores County | 3 | Cahone |
| Douglas County | 15 | Littleton |
| Eagle County | 13 | Vail |
| El Paso County | 66 | Colorado Springs |
| Elbert County | 6 | Agate |
| Fremont County | 11 | Canon City |
| Garfield County | 8 | Glenwood Springs |
| Gilpin County | 3 | Black Hawk |
| Grand County | 8 | Fraser |
| Gunnison County | 10 | Crested Butte |
| Hinsdale County | 1 | Lake City |
| Huerfano County | 3 | Gardner |
| Jackson County | 4 | Coalmont |
| Jefferson County | 33 | Arvada |
| Kiowa County | 4 | Arlington |
| Kit Carson County | 6 | Bethune |
| La Plata County | 7 | Durango |
| Lake County | 3 | Climax |
| Larimer County | 24 | Fort Collins |
| Las Animas County | 9 | Aguilar |
| Lincoln County | 6 | Limon |
| Logan County | 8 | Atwood |
| Mesa County | 19 | Grand Junction |
| Mineral County | 1 | Creede |
| Moffat County | 7 | Craig |
| Montezuma County | 8 | Cortez |
| Montrose County | 10 | Montrose |
| Morgan County | 8 | Brush |
| Otero County | 6 | Cheraw |
| Ouray County | 2 | Ouray |
| Park County | 10 | Alma |
| Phillips County | 4 | Amherst |
| Pitkin County | 6 | Aspen |
| Prowers County | 5 | Granada |
| Pueblo County | 17 | Pueblo |
| Rio Blanco County | 2 | Meeker |
| Rio Grande County | 4 | Del Norte |
| Routt County | 9 | Steamboat Springs |
| Saguache County | 6 | Center |
| San Juan County | 1 | Silverton |
| San Miguel County | 5 | Egnar |
| Sedgwick County | 3 | Julesburg |
| Summit County | 5 | Silverthorne |
| Teller County | 6 | Woodland Park |
| Washington County | 6 | Akron |
| Weld County | 39 | Greeley |
| Yuma County | 7 | Eckley |
Scope every county-equivalent recorded in Colorado. Source Census 2024 county Gazetteer (2024 Gazetteer) and GeoNames US postal codes (2026-07 postal dump). Updated . Names and boundaries follow the Census Bureau's current county-equivalent set, not the CO postal source's older names.