| Locality | Post Code |
|---|---|
| Agency, Buchanan | 64401 |
| Country Club, Buchanan | 64505, 64506 |
| De Kalb, Buchanan | 64440 |
| Dearborn, Buchanan | 64439 |
| Easton, Buchanan | 64443 |
| Edgerton, Buchanan | 64444 |
| Faucett, Buchanan | 64448 |
| Gower, Buchanan | 64454 |
| Rushville, Buchanan | 64484 |
| Saint Joseph, Buchanan | 64501, 64503, 64504, 64505, 64506, … |
| Stewartsville, Buchanan | 64490 |
| Winthrop, Buchanan | 64484 |