ZIP codes in Winnebago County
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- 54901 OshkoshWinnebago County
- 54902 OshkoshWinnebago County
- 54904 OshkoshWinnebago County
- 54927 Butte Des MortsWinnebago County
- 54947 LarsenWinnebago County
- 54952 MenashaWinnebago County
- 54956 NeenahWinnebago County
- 54963 OmroWinnebago County
- 54964 PickettWinnebago County
- 54980 WaukauWinnebago County
- 54985 OshkoshWinnebago County
- 54986 WinneconneWinnebago County