ZIP codes in Ionia County
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- 48809 BeldingIonia County
- 48815 ClarksvilleIonia County
- 48845 HubbardstonIonia County
- 48846 IoniaIonia County
- 48849 Lake OdessaIonia County
- 48851 LyonsIonia County
- 48860 LyonsIonia County
- 48865 OrleansIonia County
- 48870 FenwickIonia County
- 48873 PewamoIonia County
- 48875 PortlandIonia County
- 48881 SaranacIonia County