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	99163	Pullman	Whitman County	`208, 509, 986`
WA	99164	Pullman	Whitman County	`509`
WA	99165	Pullman	Whitman County	`509`
WA	99166	Republic	Ferry County	`509`
WA	99167	Rice	Stevens County	`509`
WA	99169	Ritzville	Adams County	`509`
WA	99170	Rosalia	Whitman County	`509`
WA	99171	Saint John	Whitman County	`509`
WA	99173	Springdale	Stevens County	`509`
WA	99174	Steptoe	Whitman County	`509`

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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.