ZIP Code 94028
Portola Valley · San Mateo, California
94028 is the ZIP code of Portola Valley in San Mateo, California, United States.
- ZIP Code
- 94028
- County
- San Mateo
- State
- California
- Country
- United States
Place with ZIP code 94028
| Place | County | Location |
|---|---|---|
| Portola Valley | San Mateo | 37.370, -122.218 |
Near San Jose
The nearest major city is San Jose, about 29 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 94028?
Portola Valley.
Which county and state is 94028 in?
San Mateo, California, United States.
What is the nearest major city to 94028?
San Jose, about 29 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.