30 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 94080 | South San Francisco | 64,761 |
| 94015 | Daly City | 64,091 |
| 94014 | Daly City | 45,315 |
| 94403 | San Mateo | 43,276 |
| 94010 | Burlingame | 43,025 |
| 94066 | San Bruno | 42,728 |
| 94025 | Menlo Park | 40,721 |
| 94044 | Pacifica | 37,274 |
| 94061 | Redwood City | 37,048 |
| 94404 | San Mateo | 35,881 |
| 94401 | San Mateo | 35,295 |
| 94063 | Redwood City | 34,433 |
| 94070 | San Carlos | 30,447 |
| 94002 | Belmont | 27,534 |
| 94062 | Redwood City | 25,759 |
| 94402 | San Mateo | 25,475 |
| 94030 | Millbrae | 22,689 |
| 94019 | Half Moon Bay | 14,419 |
| 94065 | Redwood City | 11,673 |
| 94027 | Atherton | 7,002 |
| 94028 | Portola Valley | 6,531 |
| 94005 | Brisbane | 4,692 |
| 94018 | El Granada | 3,834 |
| 94037 | Montara | 2,917 |
| 94038 | Moss Beach | 2,683 |
| 94020 | La Honda | 1,694 |
| 94060 | Pescadero | 1,465 |
| 94021 | Loma Mar | 321 |
| 94074 | San Gregorio | 126 |
| 94128 | San Francisco | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 30 ZCTAs in San Mateo County, California (US Census).