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
Population
City
5390114,978Portage
539258,810Columbus
535558,706Lodi
539546,782Pardeeville
539555,806Poynette
539603,219Rio
539563,035Randolph
539322,448Fall River
539232,224Cambria
539111,433Arlington
53969324Wyocena
53935261Friesland
53928102Doylestown

Zip Codes in Columbia County, Wisconsin by Population (2024)