17 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 61265 | Moline | 43,748 |
| 61201 | Rock Island | 36,766 |
| 61244 | East Moline | 23,308 |
| 61264 | Milan | 10,073 |
| 61282 | Silvis | 8,394 |
| 61240 | Coal Valley | 5,795 |
| 61275 | Port Byron | 4,253 |
| 61284 | Taylor Ridge | 2,599 |
| 61256 | Hampton | 1,926 |
| 61232 | Andalusia | 1,469 |
| 61239 | Carbon Cliff | 1,189 |
| 61242 | Cordova | 1,135 |
| 61259 | Illinois City | 1,053 |
| 61257 | Hillsdale | 844 |
| 61278 | Rapids City | 678 |
| 61236 | Barstow | 34 |
| 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).