ZIP code · Antioch · California · United States
ZIP code 94531 — Antioch
ZIP code 94531 serves Antioch, California.
- Postal code
- 94531Single source Value from one source, not cross-checked.
- City
- Antioch
- County
- Contra Costa
- State
- California
- Country
- United States
- Coordinates
- 37.9658, -121.7758 — precision precise (locality)
View on OpenStreetMap - Population
- 44,746 (ZCTA, ACS 5-year)
- Median household income
- $123,428
- Median age
- 38.9
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · census-acs5. Data generated on 2026-08-21. Methodology · Report an error on this page