County · California · United States
Contra Costa County ZIP codes
42 ZIP codes · 30 cities · FIPS 06013
Key facts
- State
- California (CA)
- FIPS code
- 06013
- Population
- 1,161,458
- Median household income
- $125,727
- Median age
- 40.3
- Land area
- 716.9 sq mi (1,856.8 km²)
- Population density
- 1,620 / sq mi
- Area codes
- 279, 341, 510, 916, 925
Cities and ZIP codes in Contra Costa County (30)
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.