There are 30 zip codes in San Mateo County, California. The most populated is 94080, located in South San Francisco. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
94080South San Francisco66,262
94015Daly City65,125
94014Daly City46,331
94403San Mateo43,858
94010Burlingame43,458
94066San Bruno43,369
94025Menlo Park41,017
94044Pacifica38,061
94061Redwood City37,539
94404San Mateo36,397
94401San Mateo35,392
94063Redwood City34,807
94070San Carlos31,312
94002Belmont27,893
94062Redwood City26,531
94402San Mateo26,150
94030Millbrae22,825
94019Half Moon Bay15,275
94065Redwood City11,588
94027Atherton7,142
94028Portola Valley6,888
94005Brisbane4,756
94018El Granada3,423
94038Moss Beach3,165
94037Montara2,649
94020La Honda2,030
94060Pescadero1,312
94074San Gregorio151
94021Loma Mar123
94128San Francisco0
showing: 30 rows

San Mateo County, California Zip Codes by Population (2024)