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
Maps and coordinates
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 95545 Honeydew Humboldt County 707
CA 95546 Hoopa Humboldt County 530, 707
CA 95547 Hydesville Humboldt County 707
CA 95548 Klamath Del Norte County 707
CA 95549 Kneeland Humboldt County 707
CA 95550 Korbel Humboldt County 707
CA 95551 Loleta Humboldt County 707
CA 95552 Mad River Trinity County 530, 707
CA 95553 Miranda Humboldt County 707
CA 95554 Myers Flat Humboldt County 707
Page 226 of 266

Geographic Map of California

Postal context

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.