In 2022, Rock Island County, IL had a population of 144k people with a median age of 40.2 and a median household income of $64,435. Between 2021 and 2022 the population of Rock Island County, IL declined from 144,694 to 143,819, a −0.605% decrease and its median household income grew from $58,974 to $64,435, a 9.26% increase.
The 5 largest ethnic groups in Rock Island County, IL are White (Non-Hispanic) (69.7%), Black or African American (Non-Hispanic) (10.2%), White (Hispanic) (5.36%), Other (Hispanic) (4.06%), and Two+ (Non-Hispanic) (3.62%).
None of the households in Rock Island County, IL reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
95.5% of the residents in Rock Island County, IL are U.S. citizens.
The largest universities in Rock Island County, IL are Black Hawk College (848 degrees awarded in 2022), Augustana College (767 degrees), and Trinity College of Nursing & Health Sciences (73 degrees).
In 2022, the median property value in Rock Island County, IL was $139,800, and the homeownership rate was 68.6%.
Most people in Rock Island County, IL drove alone to work, and the average commute time was 20.1 minutes. The average car ownership in Rock Island County, IL was 2 cars per household.
Rock Island County, IL borders Henry County, IL, Mercer County, IL, Whiteside County, IL, Clinton County, IA, Louisa County, IA, Muscatine County, IA, and Scott County, IA.