Antioch, CA ZIP codes
Antioch, California has 2 ZIP codes. They are in Contra Costa County.
- Population in these ZIPs
- 116,477
- Avg. median income
- $100,000population-weighted
- Typical home value
- $584,900population-weighted
- Metro area
- San Francisco-Oakland-Fremont, CA
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Antioch, CA ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 94509 | Contra Costa County | 70,090 | $86,196 | $536,300 |
| 94531 | Contra Costa County | 46,387 | $120,927 | $658,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Antioch
- Oakley 6 mi
- Brentwood 7 mi
- Pittsburg 8 mi
- Knightsen 8 mi
- Clayton 8 mi
- Bethel Island 10 mi
- Birds Landing 11 mi
- Concord 12 mi
- Rio Vista 12 mi
- Diablo 13 mi
- Discovery Bay 13 mi
- Byron 14 mi
Frequently asked questions
What county is Antioch, California in?
Antioch ZIP codes are in Contra Costa County.