Postal reference
ZIP 94509, California
ZIP code 94509 is associated with Antioch in California in the GeoNames postal reference.
Reference details
- State
- California (CA)
- ZIP code
- 94509
- Associated localities
- Antioch
- County names in postal records
- Contra Costa
- Approximate postal point
- 37.9939, -121.8089
View point on map ↗
Postal information is adapted from GeoNames, CC BY 4.0. Locality associations and coordinates are approximate, not ZIP boundaries or a guarantee of current mail delivery.