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

Wisconsin ZIP Codes

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

State ZIP Code City County Area Codes
WI 53035 Iron Ridge Dodge County 262, 920
WI 53036 Ixonia Jefferson County 262, 920
WI 53037 Jackson Washington County 262
WI 53038 Johnson Creek Jefferson County 920
WI 53039 Juneau Dodge County 920
WI 53040 Kewaskum Washington County 262, 920
WI 53042 Kiel Manitowoc County 920
WI 53044 Kohler Sheboygan County 920
WI 53045 Brookfield Waukesha County 262
WI 53046 Lannon Waukesha County 262
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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.