| Locality | Post Code |
|---|---|
| Princeton, Bureau | 61356 |
| Providence, Bureau | 61368 |
| Seatonville, Bureau | 61359 |
| Sheffield, Bureau | 61361 |
| Spring Valley, Bureau | 61362 |
| Tiskilwa, Bureau | 61368 |
| Van Orin, Bureau | 61374 |
| Walnut, Bureau | 61376 |
| Webster Park, Bureau | 61362 |
| Wyanet, Bureau | 61379 |
| Zearing, Bureau | 61337 |