ZIP Code 94546
Castro Valley · Alameda, California
94546 is the ZIP code of Castro Valley in Alameda, California, United States.
- ZIP Code
- 94546
- County
- Alameda
- State
- California
- Country
- United States
Place with ZIP code 94546
| Place | County | Location |
|---|---|---|
| Castro Valley | Alameda | 37.702, -122.078 |
Near San Francisco
The nearest major city is San Francisco, about 31 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 94546?
Castro Valley.
Which county and state is 94546 in?
Alameda, California, United States.
What is the nearest major city to 94546?
San Francisco, about 31 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.