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 54127 Green Valley Shawano County 534, 715
WI 54128 Gresham Shawano County 534, 715
WI 54129 Hilbert Calumet County 920
WI 54130 Kaukauna Outagamie County 920
WI 54131 Freedom Outagamie County 920
WI 54135 Keshena Menominee County 534, 715
WI 54136 Kimberly Outagamie County 920
WI 54137 Krakow Shawano County 534, 715, 920
WI 54138 Lakewood Oconto County 534, 715
WI 54139 Lena Oconto County 534, 715, 920
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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.