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.

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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 95612 Clarksburg Yolo County 279, 530, 707, 916
CA 95613 Coloma El Dorado County 530
CA 95614 Cool El Dorado County 530
CA 95615 Courtland Sacramento County 279, 707, 916
CA 95616 Davis Yolo County 530, 707
CA 95617 Davis Yolo County 530
CA 95618 Davis Yolo County 530, 707
CA 95619 Diamond Springs El Dorado County 530
CA 95620 Dixon Solano County 279, 530, 707, 916
CA 95621 Citrus Heights Sacramento County 279, 916
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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.