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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Washington ZIP Codes

Complete postal directory, details, and geographic map for the State of Washington.

State ZIP Code City County Area Codes
WA 98638 Naselle Pacific County 360, 503, 564, 971
WA 98639 North Bonneville Skamania County 503, 509, 971
WA 98640 Ocean Park Pacific County 360, 564
WA 98641 Oysterville Pacific County 360, 564
WA 98642 Ridgefield Clark County 360, 503, 564, 971
WA 98643 Rosburg Wahkiakum County 360, 503, 564, 971
WA 98644 Seaview Pacific County 360, 564
WA 98645 Silverlake Cowlitz County 360, 564
WA 98647 Skamokawa Wahkiakum County 360, 503, 564, 971
WA 98648 Stevenson Skamania County 360, 458, 503, 509, 541, 564, 971
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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.