Zip Code 94402 — San Mateo, CA
94402 is a ZIP Code associated with San Mateo, CA, located within San Mateo. 94402 ranks #16 out of 30 ZIP codes in San Mateo County by population (and #716 out of 1,802 in CA). The area supports an estimated population of 25,475 residents across Data Pending housing units, with a population density of 1,946.5 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (37.540350, -122.333880)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 94402 |
| Primary City | San Mateo |
| State / Province | CA |
| County | San Mateo |
| Total Population | 25,475 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1,946.5 people/sq mi |
| Timezone | America/Los_Angeles |
How 94402 Compares
| Metric | ZIP 94402 | San Mateo County | CA State Average |
|---|
| Population | 25,475 | 713,109 (Total) | 39,286,245 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 1,946.5 /sq mi | -- | -- |
| County Pop Rank | #16 of 30 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →