There are 17 cities in Rock Island County, Illinois.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Moline1Illinois41,11642,896-1.1%2,45416.75
Rock Island2Illinois35,56437,013-0.96%2,10816.87
East Moline3Illinois20,39621,328-1.16%1,39714.60
Silvis4Illinois7,7597,989-0.84%1,8114.29
Milan5Illinois4,8595,088-1.28%7776.25
Coal Valley6Illinois3,7673,863-0.66%1,2103.11
Carbon Cliff7Illinois1,7521,841-1.3%8362.10
Hampton8Illinois1,7011,774-1.16%1,1641.46
Port Byron9Illinois1,6051,665-0.86%6612.43
Andalusia10Illinois1,1371,181-0.96%9681.18
Coyne Center11Illinois9481,102 5871.61
Rapids City12Illinois912958-1.41%5611.63
Cordova13Illinois639674-1.39%1,1130.57
Reynolds14Illinois476498-1.04%1,2930.37
Oak Grove15Illinois462474-0.65%7020.66
Hillsdale16Illinois398415-1.24%6140.65
Rock Island Arsenal17Illinois375353 2391.57
showing: 17 rows

Cities in Rock Island County, Illinois by Population (2024)

What is the largest city in Rock Island County, Illinois?

Moline is the largest city in Rock Island County.

What is the smallest city in Rock Island County, Illinois?

Rock Island Arsenal is the smallest city in Rock Island County.

How many cities are in Rock Island County?

There are 17 cities in Rock Island County, Illinois.

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