ZIP codes in Antioch, California
Antioch has 2 ZIP codes in this directory. Each ZIP is listed with its county, population and time zone.
| ZIP | County | Population | Time zone |
|---|---|---|---|
| 94509 | Contra Costa | 110,542 | America/Los_Angeles |
| 94531 | Contra Costa | 110,542 | America/Los_Angeles |
About Antioch ZIP codes
ZIP codes in Antioch are part of the USPS delivery network for California. The codes above are ordered numerically; each links to a page with coordinates, nearby ZIPs and more detail. Population shown is the estimated population of the city: 110,542.