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 99020 Marshall Spokane County 509
WA 99021 Mead Spokane County 208, 509, 986
WA 99022 Medical Lake Spokane County 509
WA 99023 Mica Spokane County 208, 509, 986
WA 99025 Newman Lake Spokane County 208, 509, 986
WA 99026 Nine Mile Falls Stevens County 509
WA 99027 Otis Orchards Spokane County 509
WA 99029 Reardan Lincoln County 509
WA 99030 Rockford Spokane County 208, 509, 986
WA 99031 Spangle Spokane 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.