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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Wisconsin ZIP Codes

Complete postal directory, details, and geographic map for the State of Wisconsin.

State ZIP Code City County Area Codes
WI 54017 New Richmond St. Croix County 534, 715
WI 54020 Osceola Polk County 534, 651, 715
WI 54021 Prescott Pierce County 534, 651, 715
WI 54022 River Falls Pierce County 534, 651, 715
WI 54023 Roberts St. Croix County 534, 715
WI 54024 Saint Croix Falls Polk County 534, 651, 715
WI 54025 Somerset St. Croix County 534, 651, 715
WI 54026 Star Prairie Polk County 534, 715
WI 54027 Wilson St. Croix County 534, 715
WI 54028 Woodville St. Croix County 534, 715
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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.