San Mateo County ZIP Codes
San Mateo County is a county of California.
- ZIP codes
- 38
- Cities & towns
- 24
- Area codes
- 5
- Land area
- 449 sq mi
Every ZIP code in San Mateo County
| ZIP code | City |
|---|---|
| 94002 | Belmont |
| 94005 | Brisbane |
| 94010 | Burlingame |
| 94011 | Burlingame |
| 94014 | Daly City |
| 94015 | Daly City |
| 94016 | Daly City |
| 94017 | Daly City |
| 94018 | El Granada |
| 94019 | Half Moon Bay |
| 94020 | La Honda |
| 94021 | Loma Mar |
| 94025 | Menlo Park |
| 94026 | Menlo Park |
| 94027 | Atherton |
| 94028 | Portola Valley |
| 94030 | Millbrae |
| 94037 | Montara |
| 94038 | Moss Beach |
| 94044 | Pacifica |
| 94060 | Pescadero |
| 94061 | Redwood City |
| 94062 | Redwood City |
| 94063 | Redwood City |
| 94064 | Redwood City |
| 94065 | Redwood City |
| 94066 | San Bruno |
| 94070 | San Carlos |
| 94074 | San Gregorio |
| 94080 | South San Francisco |
| 94083 | South San Francisco |
| 94128 | San Francisco |
| 94303 | Palo Alto |
| 94401 | San Mateo |
| 94402 | San Mateo |
| 94403 | San Mateo |
| 94404 | San Mateo |
| 94497 | San Mateo |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the San Mateo County codes above are listed without a column we would have to invent.
Cities and towns in San Mateo County
A further 7 places in San Mateo County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.
Area codes covering San Mateo County
Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.
Where San Mateo County's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope every ZIP code recorded in San Mateo County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated . The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.