Rock Island County, Illinois
Rock Island County is a county in Illinois with an estimated population of 141,236 in 2023. 15 cities, towns and Census places in it are indexed here.
Largest places in Rock Island County
Moline 41,965Rock Island 36,132East Moline 20,806Silvis 7,896Milan 4,968Coal Valley 3,816Carbon Cliff 1,792Hampton 1,738Port Byron 1,627Andalusia 1,159Rapids City 938Cordova 656Reynolds 484Oak Grove 464Hillsdale 407
About Rock Island County
Rock Island County is one of the counties of Illinois. County governments in Illinois handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.