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 53952 Oxford Adams County 608
WI 53953 Packwaukee Marquette County 608
WI 53954 Pardeeville Columbia County 608, 920
WI 53955 Poynette Columbia County 608, 920
WI 53956 Randolph Dodge County 920
WI 53957 Randolph Columbia County 920
WI 53958 Reedsburg Sauk County 608
WI 53959 Reedsburg Sauk County 608
WI 53960 Rio Columbia County 608, 920
WI 53961 Rock Springs 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.