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
City
Population
54956Neenah46,539
54901Oshkosh37,327
54904Oshkosh22,342
54902Oshkosh21,706
54963Omro7,200
54986Winneconne5,410
54947Larsen2,264
54964Pickett956
54985Winnebago522
54927Butte Des Morts409
54980Waukau255

Winnebago County, Wisconsin Zip Codes by Population (2024)