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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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Grant County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Grant County.

County State ZIP Code City Area Codes
Grant County WA 98857 Warden 509
Grant County WA 98860 Wilson Creek 509
Grant County WA 99115 Coulee City 509
Grant County WA 99123 Electric City 509
Grant County WA 99133 Grand Coulee 509
Grant County WA 99135 Hartline 509
Grant County WA 99321 Beverly 509
Grant County WA 99349 Mattawa 509
Grant County WA 99357 Royal City 509
Grant County WI 53554 Livingston 608
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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.