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U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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San Mateo County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in San Mateo County.

County State ZIP Code City Area Codes
San Mateo County CA 94002 Belmont 650
San Mateo County CA 94005 Brisbane 415, 628, 650
San Mateo County CA 94010 Burlingame 650
San Mateo County CA 94011 Burlingame 650
San Mateo County CA 94013 Daly City 650
San Mateo County CA 94014 Daly City 415, 628, 650
San Mateo County CA 94015 Daly City 415, 628, 650
San Mateo County CA 94016 Daly City 650
San Mateo County CA 94017 Daly City 650
San Mateo County CA 94018 El Granada 650
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.