| Locality | Post Code |
|---|---|
| Clear Creek, Keokuk | 52248 |
| Coal Creek, Keokuk | 50268 |
| Delta, Keokuk | 52550 |
| Farson, Keokuk | 52563 |
| Gibson, Keokuk | 50104 |
| Harper, Keokuk | 52231 |
| Hayesville, Keokuk | 52562 |
| Hedrick, Keokuk | 52563 |
| Indianapolis, Keokuk | 50268 |
| Keota, Keokuk | 52248 |
| Keswick, Keokuk | 50136 |
| Kinross, Keokuk | 52335 |
| Lancaster, Keokuk | 52591 |
| Martinsburg, Keokuk | 52568 |
| North English, Keokuk | 52316 |
| Ollie, Keokuk | 52576 |
| Richland, Keokuk | 52585 |
| Sigourney, Keokuk | 52591 |
| South English, Keokuk | 52335 |
| Talleyrand, Keokuk | 52248 |
| Thornburg, Keokuk | 50255 |
| Veo, Keokuk | 52585 |
| Webster, Keokuk | 52355 |
| What Cheer, Keokuk | 50268 |