There are 13 zip codes in Columbia County, Wisconsin. The most populated is 53901, located in Portage. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
53901Portage14,978
53925Columbus8,810
53555Lodi8,706
53954Pardeeville6,782
53955Poynette5,806
53960Rio3,219
53956Randolph3,035
53932Fall River2,448
53923Cambria2,224
53911Arlington1,433
53969Wyocena324
53935Friesland261
53928Doylestown102

Columbia County, Wisconsin Zip Codes by Population (2024)