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 98259 North Lakewood Snohomish County 360, 564
WA 98260 Langley Island County 360, 564
WA 98261 Lopez Island San Juan County 360, 564
WA 98262 Lummi Island Whatcom County 360, 564
WA 98263 Lyman Skagit County 360, 564
WA 98264 Lynden Whatcom County 236, 360, 564, 604, 672, 778
WA 98266 Maple Falls Whatcom County 236, 360, 564, 604, 672, 778
WA 98267 Marblemount Skagit County 360, 564
WA 98270 Marysville Snohomish County 360, 425, 564
WA 98271 Marysville Snohomish County 360, 425, 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.