City · California · United States

San Mateo, CA — ZIP codes

5 ZIP codes · San Mateo County

City: San Mateo
County: San Mateo
State: California
Country: United States
Postal codes: 9440194402944039440494497
Single source
Coordinates: 37.5735, -122.3225 View on OpenStreetMap

ZIP codes (5)

Postal code	Place name	Verification
94401	San Mateo	Single source
94402	San Mateo	Single source
94403	San Mateo	Single source
94404	San Mateo	Single source
94497	San Mateo	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 · census-acs5. Last generated : 2026-08-21. Report an error.