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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State directory

Washington ZIP Codes

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

State ZIP Code City County Area Codes
WA 99129 Fruitland Stevens County 509
WA 99130 Garfield Whitman County 208, 509, 986
WA 99131 Gifford Stevens County 509
WA 99133 Grand Coulee Grant County 509
WA 99134 Harrington Lincoln County 509
WA 99135 Hartline Grant County 509
WA 99136 Hay Whitman County 509
WA 99137 Hunters Stevens County 509
WA 99138 Inchelium Ferry County 509
WA 99139 Ione Pend Oreille County 208, 236, 250, 509, 672, 778, 986
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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.