In 2017, Rock Island County, IL had a population of 146k people with a median age of 40 and a median household income of $51,426. Between 2016 and 2017 the population of Rock Island County, IL declined from 146,536 to 146,205, a -0.226% decrease and its median household income grew from $50,208 to $51,426, a 2.43% increase.
The 5 largest ethnic groups in Rock Island County, IL are White (Non-Hispanic) (72.6%), Black or African American (Non-Hispanic) (9.63%), White (Hispanic) (8.96%), Two or More Races (Non-Hispanic) (2.44%), and Asian (Non-Hispanic) (2.4%). N/A% of the people in Rock Island County, IL speak a non-English language, and 95% are U.S. citizens.
The median property value in Rock Island County, IL is $115,600, and the homeownership rate is 69%. 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.