There are 15 zip codes in Fond du Lac County, Wisconsin. The most populated is 54935, located in Fond Du Lac. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5493542,498Fond Du Lac
5493721,029Fond Du Lac
5396313,907Waupun
5497110,758Ripon
530107,545Campbellsport
530652,383Oakfield
530492,325Malone
539192,224Brandon
530571,846Mount Calvary
549791,786Van Dyne
530191,761Eden
549741,566Rosendale
530791,310Saint Cloud
549321,307Eldorado
53931339Fairwater

Zip Codes in Fond du Lac County, Wisconsin by Population (2024)