| Post Office | Independence |
| Division | Buchanan |
| Pincode | 50644 |
| Post Office | Jesup |
| Division | Buchanan |
| Pincode | 50648 |
| Post Office | Fairbank |
| Division | Buchanan |
| Pincode | 50629 |
| Post Office | Winthrop |
| Division | Buchanan |
| Pincode | 50682 |
| Post Office | Hazleton |
| Division | Buchanan |
| Pincode | 50641 |
| Post Office | Brandon |
| Division | Buchanan |
| Pincode | 52210 |
| Post Office | Rowley |
| Division | Buchanan |
| Pincode | 52329 |
| Post Office | Lamont |
| Division | Buchanan |
| Pincode | 50650 |
| Post Office | Quasqueton |
| Division | Buchanan |
| Pincode | 52326 |
10 City in Buchanan | List of Zip Codes Location In Iowa and Your selected County Buchanan