City · California · United States
Portola Valley, CA — ZIP codes
1 ZIP code · San Mateo County
- City
- Portola Valley
- County
- San Mateo
- State
- California
- Country
- United States
- Postal code
- 94028Single source
- Coordinates
- 37.3702, -122.2182 View on OpenStreetMap
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 94028 | Portola Valley | Single source |
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.