There are 18 zip codes in Rock Island County, Illinois. The most populated is 61265, located in Moline. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
6126544,006Moline
6120137,838Rock Island
6124423,239East Moline
612649,927Milan
612828,234Silvis
612405,880Coal Valley
612754,393Port Byron
612562,063Hampton
612841,745Taylor Ridge
612321,506Andalusia
612591,379Illinois City
612391,174Carbon Cliff
612421,136Cordova
61279944Reynolds
61257836Hillsdale
61278657Rapids City
6123665Barstow
61237Buffalo Prairie
showing: 18 rows

Zip Codes in Rock Island County, Illinois by Population (2024)