City · California · United States

Palo Alto, CA — ZIP codes

6 ZIP codes · San Mateo County

City: Palo Alto
County: San Mateo
State: California
Country: United States
Postal codes: 943019430294303943049430694309
Single source
Coordinates: 37.4673, -122.1388 View on OpenStreetMap

ZIP codes (6)

Postal code	Place name	Verification
94301	Palo Alto	Single source
94302	Palo Alto	Single source
94303	Palo Alto	Single source
94304	Palo Alto	Single source
94306	Palo Alto	Single source
94309	Palo Alto	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.