ZIP code · Castro Valley · California · United States
ZIP code 94546 — Castro Valley
ZIP code 94546 serves Castro Valley, California.
- Postal code
- 94546Single source Value from one source, not cross-checked.
- City
- Castro Valley
- County
- Alameda
- State
- California
- Country
- United States
- Coordinates
- 37.7015, -122.0782 — precision precise (locality)
View on OpenStreetMap - Population
- 45,848 (ZCTA, ACS 5-year)
- Median household income
- $125,780
- Median age
- 42.1
Nearby localities
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