ZIP codes in Jefferson County
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- 53036 IxoniaJefferson County
- 53038 Johnson CreekJefferson County
- 53094 WatertownJefferson County
- 53137 HelenvilleJefferson County
- 53156 PalmyraJefferson County
- 53178 OconomowocJefferson County
- 53538 Fort AtkinsonJefferson County
- 53549 JeffersonJefferson County
- 53551 Lake MillsJefferson County
- 53594 WaterlooJefferson County