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 98236 Clinton Island County 360, 564
WA 98237 Concrete Skagit County 360, 564
WA 98238 Conway Skagit County 360, 564
WA 98239 Coupeville Island County 360, 564
WA 98240 Custer Whatcom County 360, 564
WA 98241 Darrington Snohomish County 360, 509, 564
WA 98243 Deer Harbor San Juan County 360, 564
WA 98244 Deming Whatcom County 360, 564
WA 98245 Eastsound San Juan County 360, 564
WA 98247 Everson Whatcom County 360, 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.