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	99140	Keller	Ferry County	`509`
WA	99141	Kettle Falls	Stevens County	`509`
WA	99143	Lacrosse	Whitman County	`509`
WA	99144	Lamona	Lincoln County	`509`
WA	99146	Laurier	Ferry County	`509`
WA	99147	Lincoln	Lincoln County	`509`
WA	99148	Loon Lake	Stevens County	`509`
WA	99149	Malden	Whitman County	`509`
WA	99150	Malo	Ferry County	`509`
WA	99151	Marcus	Stevens 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.