There are 11 zip codes in Winnebago County, Wisconsin. The most populated is 54956, located in Neenah. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5495646,539Neenah
5490137,327Oshkosh
5490422,342Oshkosh
5490221,706Oshkosh
549637,200Omro
549865,410Winneconne
549472,264Larsen
54964956Pickett
54985522Winnebago
54927409Butte Des Morts
54980255Waukau

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