| Locality | Post Code |
|---|---|
| Adrian, Hancock | 62330 |
| Augusta, Hancock | 62311 |
| Basco, Hancock | 62313 |
| Bentley, Hancock | 62321 |
| Birmingham, Hancock | 62367 |
| Bowen, Hancock | 62316 |
| Burnside, Hancock | 62330 |
| Carthage, Hancock | 62321 |
| Colmar, Hancock | 62367 |
| Colusa, Hancock | 62329 |
| Dallas City, Hancock | 62330 |
| Denver, Hancock | 62321 |
| Elvaston, Hancock | 62334 |
| Ferris, Hancock | 62336 |
| Fountain Green, Hancock | 62321 |
| Hamilton, Hancock | 62341 |
| Harmony, Hancock | 62321 |
| La Crosse, Hancock | 61450 |
| La Harpe, Hancock | 61450 |
| McCall, Hancock | 62321 |
| Nauvoo, Hancock | 62354 |
| Niota, Hancock | 62358 |
| Pilot Grove, Hancock | 62330 |
| Plymouth, Hancock | 62367 |
| Pontoosuc, Hancock | 62330 |
| Stillwell, Hancock | 62380 |