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 53941 La Valle Sauk County 608
WI 53942 Lime Ridge Sauk County 608
WI 53943 Loganville Sauk County 608
WI 53944 Lyndon Station Juneau County 608
WI 53946 Markesan Green Lake County 608, 920
WI 53947 Marquette Green Lake County 920
WI 53948 Mauston Juneau County 608
WI 53949 Montello Marquette County 608, 920
WI 53950 New Lisbon Juneau County 608
WI 53951 North Freedom Sauk County 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.