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.

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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 98552 Humptulips Grays Harbor County 360, 564
WA 98554 Lebam Pacific County 360
WA 98555 Lilliwaup Mason County 360, 564
WA 98556 Littlerock Thurston County 360, 564
WA 98557 Mccleary Grays Harbor County 360, 564
WA 98558 Mckenna Pierce County 253, 360, 564
WA 98559 Malone Grays Harbor County 360, 564
WA 98560 Matlock Mason County 360, 564
WA 98561 Menlo Pacific County 360
WA 98562 Moclips Grays Harbor 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.