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 98034 Kirkland King County 206, 425
WA 98035 Kent King County 253
WA 98036 Lynnwood Snohomish County 425
WA 98037 Lynnwood Snohomish County 425
WA 98038 Maple Valley King County 253, 360, 425, 564
WA 98039 Medina King County 206, 425
WA 98040 Mercer Island King County 206, 425
WA 98041 Bothell King County 425
WA 98042 Kent King County 253, 360, 425, 564
WA 98043 Mountlake Terrace Snohomish County 206, 425
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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.