City · California · United States
Castro Valley, CA — ZIP codes
2 ZIP codes · Alameda County
- City
- Castro Valley
- County
- Alameda
- State
- California
- Country
- United States
- Postal codes
- 9454694552Single source
- Coordinates
- 37.7015, -122.0782 View on OpenStreetMap
ZIP codes (2)
Sources and verification
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. Last generated : 2026-08-21. Report an error.