In 2018, Rock Island County, IL had a population of 145k people with a median age of 40.1 and a median household income of $52,630. Between 2017 and 2018 the population of Rock Island County, IL declined from 146,205 to 145,275, a -0.636% decrease and its median household income grew from $51,426 to $52,630, a 2.34% increase.
The 5 largest ethnic groups in Rock Island County, IL are White (Non-Hispanic) (72%), Black or African American (Non-Hispanic) (9.71%), White (Hispanic) (8.89%), Two+ (Non-Hispanic) (2.62%), and Asian (Non-Hispanic) (2.55%). NaNk% of the people in Rock Island County, IL speak a non-English language, and 95.2% are U.S. citizens.
The median property value in Rock Island County, IL is $117,000, and the homeownership rate is 68.7%. Most people in Rock Island County, IL commute by Drove Alone, and the average commute time is 18.6 minutes. The average car ownership in Rock Island County, IL is 2 cars per household.