San Mateo, California ZIP Codes
- ZIP records
4 - Sum of listed ZIP population estimates
139,927 - Counties represented
1 - Population range
25,475–43,276 per ZIP
Population sum includes positive estimates in these ZIP records; it is not an official city population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | County | Population estimate |
|---|---|---|---|---|
| 1 | 94403 | San Mateo | San Mateo | 43,276 |
| 2 | 94404 | San Mateo | San Mateo | 35,881 |
| 3 | 94401 | San Mateo | San Mateo | 35,295 |
| 4 | 94402 | San Mateo | San Mateo | 25,475 |
Counties represented
All ZIP Codes in San Mateo
- ZIP 94401 — San Mateo County
- ZIP 94402 — San Mateo County
- ZIP 94403 — San Mateo County
- ZIP 94404 — San Mateo County
Browse all ZIP data for California
Methodology: ZIP records are grouped by the source file's primary city and state fields. Population ranges and sums use positive ZIP-level estimates; sums should not be read as official city totals. County links use each record's listed county assignment.