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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California ZIP Codes

Complete postal directory, details, and geographic map for the State of California.

State ZIP Code City County Area Codes
CA 94913 San Rafael Marin County 415
CA 94914 Kentfield Marin County 415, 628
CA 94915 San Rafael Marin County 415
CA 94920 Belvedere Tiburon Marin County 415, 628
CA 94922 Bodega Sonoma County 707
CA 94923 Bodega Bay Sonoma County 415, 628, 707
CA 94924 Bolinas Marin County 415, 628
CA 94925 Corte Madera Marin County 415, 628
CA 94926 Rohnert Park Sonoma County 707
CA 94927 Rohnert Park Sonoma County 707
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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.