Colorado ZIP codes
All 645 ZIPs in Colorado, 80001 to 81658. Tap one on the map or in the list.
645
ZIP codes
5,862,421
people live in them
64
counties
118
PO Box & no-area ZIPs
Most people
All 645 Colorado ZIP codes
ZIP codes by county
Pick a county for its ZIP list and map. Counts include ZIPs that only partly reach into the county.
- Adams County44
- Alamosa County6
- Arapahoe County41
- Archuleta County6
- Baca County8
- Bent County7
- Boulder County30
- Broomfield County7
- Chaffee County7
- Cheyenne County5
- Clear Creek County6
- Conejos County8
- Costilla County7
- Crowley County7
- Custer County4
- Delta County10
- Denver County63
- Dolores County5
- Douglas County19
- Eagle County14
- El Paso County69
- Elbert County15
- Fremont County14
- Garfield County10
- Gilpin County5
- Grand County10
- Gunnison County13
- Hinsdale County3
- Huerfano County4
- Jackson County4
- Jefferson County41
- Kiowa County6
- Kit Carson County6
- La Plata County8
- Lake County3
- Larimer County30
- Las Animas County12
- Lincoln County11
- Logan County9
- Mesa County20
- Mineral County3
- Moffat County8
- Montezuma County8
- Montrose County13
- Morgan County10
- Otero County7
- Ouray County3
- Park County12
- Phillips County4
- Pitkin County8
- Prowers County6
- Pueblo County20
- Rio Blanco County4
- Rio Grande County5
- Routt County13
- Saguache County9
- San Juan County2
- San Miguel County7
- Sedgwick County4
- Summit County5
- Teller County8
- Washington County12
- Weld County47
- Yuma County13
Questions people actually ask
How many ZIP codes are in Colorado?
645 ZIP codes are in use in Colorado. 527 cover a delivery area, and 118 are PO Box, single-building or organization ZIPs with no area of their own.
What do Colorado ZIP codes start with?
Colorado ZIP codes start with these three-digit prefixes: 800–816. Each prefix is a mail sorting area run from one processing center.
Which Colorado ZIP code has the most people?
80134 in Parker has the most residents of any Colorado ZIP, about 80,302 people in the Census Bureau’s ACS 2020–2024 estimates.
Which Colorado county has the most ZIP codes?
El Paso County touches 69 ZIP codes, the most of the 64 counties in Colorado. 158 Colorado ZIPs reach into more than one county.
Are these the official USPS ZIP code boundaries?
The map uses Census ZIP Code Tabulation Areas, the standard public stand-in for USPS delivery areas. They match for almost every home. For a mailing address, the USPS ZIP Code lookup has the final word.
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Updated 2026-11-10 · Where the data comes from