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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Wisconsin ZIP Codes

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

State ZIP Code City County Area Codes
WI 54171 Sobieski Oconto County 920
WI 54173 Suamico Brown County 920
WI 54174 Suring Oconto County 534, 715, 920
WI 54175 Townsend Oconto County 534, 715
WI 54177 Wausaukee Marinette County 534, 715, 906
WI 54180 Wrightstown Brown County 920
WI 54182 Zachow Shawano County 534, 715
WI 54201 Algoma Kewaunee County 920
WI 54202 Baileys Harbor Door County 920
WI 54204 Brussels Door County 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.