17 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 61265 | Moline | 44,006 |
| 61201 | Rock Island | 37,838 |
| 61244 | East Moline | 23,239 |
| 61264 | Milan | 9,927 |
| 61282 | Silvis | 8,234 |
| 61240 | Coal Valley | 5,880 |
| 61275 | Port Byron | 4,393 |
| 61256 | Hampton | 2,063 |
| 61284 | Taylor Ridge | 1,745 |
| 61232 | Andalusia | 1,506 |
| 61259 | Illinois City | 1,379 |
| 61239 | Carbon Cliff | 1,174 |
| 61242 | Cordova | 1,136 |
| 61257 | Hillsdale | 836 |
| 61278 | Rapids City | 657 |
| 61236 | Barstow | 65 |
| 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).