17 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 61265 | Moline | 43,851 |
| 61201 | Rock Island | 37,294 |
| 61244 | East Moline | 23,288 |
| 61264 | Milan | 10,056 |
| 61282 | Silvis | 8,345 |
| 61240 | Coal Valley | 5,988 |
| 61275 | Port Byron | 4,226 |
| 61284 | Taylor Ridge | 2,122 |
| 61256 | Hampton | 1,946 |
| 61232 | Andalusia | 1,498 |
| 61239 | Carbon Cliff | 1,138 |
| 61242 | Cordova | 1,135 |
| 61259 | Illinois City | 1,107 |
| 61257 | Hillsdale | 866 |
| 61278 | Rapids City | 671 |
| 61236 | Barstow | 43 |
| 61237 | Buffalo Prairie | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 17 ZCTAs in Rock Island County, Illinois (US Census).