ZIP codes in Buchanan County
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- 64401 AgencyBuchanan County
- 64440 De KalbBuchanan County
- 64443 EastonBuchanan County
- 64448 FaucettBuchanan County
- 64484 RushvilleBuchanan County
- 64501 St. JosephBuchanan County
- 64503 St. JosephBuchanan County
- 64504 St. JosephBuchanan County
- 64505 St. JosephBuchanan County
- 64506 St. JosephBuchanan County
- 64507 St. JosephBuchanan County