In 2017, Johnson County, IL had a population of 12.9k people with a median age of 42.5 and a median household income of $45,743. Between 2016 and 2017 the population of Johnson County, IL grew from 12,866 to 12,899, a 0.256% increase and its median household income grew from $44,179 to $45,743, a 3.54% increase.
The 5 largest ethnic groups in Johnson County, IL are White (Non-Hispanic) (84.7%), Black or African American (Non-Hispanic) (11.1%), White (Hispanic) (2.95%), Two or More Races (Non-Hispanic) (0.535%), and Black or African American (Hispanic) (0.233%). N/A% of the people in Johnson County, IL speak a non-English language, and 99.2% are U.S. citizens.
The median property value in Johnson County, IL is $96,600, and the homeownership rate is 81.5%. Most people in Johnson County, IL commute by Drove Alone, and the average commute time is 23.5 minutes. The average car ownership in Johnson County, IL is 2 cars per household.