ZIP Code 94528
Diablo · Contra Costa, California
94528 is the ZIP code of Diablo in Contra Costa, California, United States.
- ZIP Code
- 94528
- County
- Contra Costa
- State
- California
- Country
- United States
Place with ZIP code 94528
| Place | County | Location |
|---|---|---|
| Diablo | Contra Costa | 37.839, -121.967 |
Near San Francisco
The nearest major city is San Francisco, about 40 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 94528?
Diablo.
Which county and state is 94528 in?
Contra Costa, California, United States.
What is the nearest major city to 94528?
San Francisco, about 40 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.