County · Colorado · United States
Boulder County ZIP codes
19 ZIP codes · 13 cities · FIPS 08013
Key facts
- State
- Colorado (CO)
- FIPS code
- 08013
- Population
- 328,317
- Median household income
- $102,772
- Median age
- 37.5
- Land area
- 726.4 sq mi (1,881.3 km²)
- Population density
- 452 / sq mi
- Area codes
- 303, 720, 970, 983
Cities and ZIP codes in Boulder County (13)
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.