There are 17 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
City
Population
61265Moline44,006
61201Rock Island37,838
61244East Moline23,239
61264Milan9,927
61282Silvis8,234
61240Coal Valley5,880
61275Port Byron4,393
61256Hampton2,063
61284Taylor Ridge1,745
61232Andalusia1,506
61259Illinois City1,379
61239Carbon Cliff1,174
61242Cordova1,136
61257Hillsdale836
61278Rapids City657
61236Barstow65
61237Buffalo Prairie0

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