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 98851 Soap Lake Grant County 509
WA 98852 Stehekin Chelan County 360, 509, 564
WA 98853 Stratford Grant County 509
WA 98855 Tonasket Okanogan County 509
WA 98856 Twisp Okanogan County 360, 509, 564
WA 98857 Warden Grant County 509
WA 98858 Waterville Douglas County 509
WA 98859 Wauconda Okanogan County 509
WA 98860 Wilson Creek Grant County 509
WA 98862 Winthrop Okanogan County 360, 509, 564
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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.