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 98248 Ferndale Whatcom County 360, 564
WA 98249 Freeland Island County 360, 564
WA 98250 Friday Harbor San Juan County 360, 564
WA 98251 Gold Bar Snohomish County 360, 564
WA 98252 Granite Falls Snohomish County 360, 564
WA 98253 Greenbank Island County 360, 564
WA 98255 Hamilton Skagit County 360, 564
WA 98256 Index Snohomish County 360, 564
WA 98257 La Conner Skagit County 360, 564
WA 98258 Lake Stevens 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.