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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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 99117 Creston Lincoln County 509
WA 99118 Curlew Ferry County 509
WA 99119 Cusick Pend Oreille County 208, 236, 250, 509, 672, 778, 986
WA 99121 Danville Ferry County 509
WA 99122 Davenport Lincoln County 509
WA 99123 Electric City Grant County 509
WA 99124 Elmer City Okanogan County 509
WA 99125 Endicott Whitman County 509
WA 99126 Evans Stevens County 509
WA 99128 Farmington Whitman County 208, 509, 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.