U.S. postal lookup

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.

42,735 verified records
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County directory

San Francisco County ZIP Codes

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

County State ZIP Code City Area Codes
San Francisco County CA 94133 San Francisco 415, 628
San Francisco County CA 94134 San Francisco 415, 628
San Francisco County CA 94135 San Francisco 415
San Francisco County CA 94136 San Francisco 415
San Francisco County CA 94137 San Francisco 415
San Francisco County CA 94138 San Francisco 415
San Francisco County CA 94139 San Francisco 415
San Francisco County CA 94140 San Francisco 415
San Francisco County CA 94141 San Francisco 415
San Francisco County CA 94142 San Francisco 415
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Geographic Map of San Francisco County

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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.