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	98923	Cowiche	Yakima County	`509`
WA	98925	Easton	Kittitas County	`360, 425, 509, 564`
WA	98926	Ellensburg	Kittitas County	`509`
WA	98929	Naches	Yakima County	`509`
WA	98930	Grandview	Yakima County	`509`
WA	98932	Granger	Yakima County	`509`
WA	98933	Harrah	Yakima County	`509`
WA	98934	Kittitas	Kittitas County	`509`
WA	98935	Mabton	Yakima County	`509`
WA	98936	Moxee	Yakima 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.