There are 11 zip codes in St. Croix County, Wisconsin. The most populated is 54016, located in Hudson. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5401633,465Hudson
5401719,652New Richmond
540257,200Somerset
540026,791Baldwin
540234,715Roberts
540153,863Hammond
540133,428Glenwood City
540282,675Woodville
540821,805Houlton
540271,107Wilson
540071,042Deer Park

Zip Codes in St. Croix County, Wisconsin by Population (2024)