There are 31 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
Population
City
9408066,262South San Francisco
9401565,125Daly City
9430347,989Palo Alto
9401446,331Daly City
9440343,858San Mateo
9401043,458Burlingame
9406643,369San Bruno
9402541,017Menlo Park
9404438,061Pacifica
9406137,539Redwood City
9440436,397San Mateo
9440135,392San Mateo
9406334,807Redwood City
9407031,312San Carlos
9400227,893Belmont
9406226,531Redwood City
9440226,150San Mateo
9403022,825Millbrae
9401915,275Half Moon Bay
9406511,588Redwood City
940277,142Atherton
940286,888Portola Valley
940054,756Brisbane
940183,423El Granada
940383,165Moss Beach
940372,649Montara
940202,030La Honda
940601,312Pescadero
94074151San Gregorio
94021123Loma Mar
94128San Francisco
showing: 31 rows

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