| Ortschaft | Postleitzahl |
|---|---|
| Andalusia, Rock Island | 61232 |
| Babcock, Rock Island | 61244 |
| Barstow, Rock Island | 61236 |
| Buffalo Prairie, Rock Island | 61237 |
| Byron Hills, Rock Island | 61275 |
| Campbells Island, Rock Island | 61244 |
| Carbon Cliff, Rock Island | 61239 |
| Coal Valley, Rock Island | 61240 |
| Coe, Rock Island | 61275 |
| Cordova, Rock Island | 61242 |
| East Moline, Rock Island | 61244 |
| Hampton, Rock Island | 61256 |
| Hillsdale, Rock Island | 61257 |
| Illinois City, Rock Island | 61259 |
| Marston, Rock Island | 61279 |
| Meersman, Rock Island | 61244 |
| Merry Oaks, Rock Island | 61244 |
| Milan, Rock Island | 61264 |
| Mobet Meadows, Rock Island | 61275 |
| Moline, Rock Island | 61265 |
| Oak Grove, Rock Island | 61264 |
| Perryton, Rock Island | 61279 |
| Port Byron, Rock Island | 61275 |
| Rapids City, Rock Island | 61278 |
| Reynolds, Rock Island | 61279 |
| Rock Island, Rock Island | 61201, 61204 |