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
All states and U.S. territories
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State directory

California ZIP Codes

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

State ZIP Code City County Area Codes
CA 95937 Dunnigan Yolo County 530
CA 95938 Durham Butte County 530
CA 95939 Elk Creek Glenn County 530, 707
CA 95940 Feather Falls Butte County 530
CA 95941 Forbestown Butte County 530
CA 95942 Forest Ranch Butte County 530
CA 95943 Glenn Glenn County 530
CA 95944 Goodyears Bar Sierra County 530
CA 95945 Grass Valley Nevada County 530
CA 95946 Penn Valley Nevada County 530
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Geographic Map of California

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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.