Johnson County, IL has a population of 12,866 people with a median age of 42.9 and a median household income of $44,179. Between 2015 and 2016 the population of Johnson County, IL grew from 12,829 to 12,866, a 0.29% increase and its median household income grew from $42,287 to $44,179, a 4.47% increase.
The population of Johnson County, IL is 86% White, 9.4% Black, and 3.39% Hispanic. 2.7% of the people in Johnson County, IL speak a non-English language, and 99% are U.S. citizens.
The largest universities in Johnson County, IL are Shawnee Community College, with 651 graduates, Southeastern Illinois College, with 508 graduates, and Wabash Valley College, with 283 graduates.
The median property value in Johnson County, IL is $96,000, and the homeownership rate is 82.9%. Most people in Johnson County, IL commute by Drove Alone, and the average commute time is 24.8 minutes. The average car ownership in Johnson County, IL is 2 cars per household.
Johnson County, IL is the 83rd most populated county in Illinois and borders Massac County, IL; Pope County, IL; Pulaski County, IL; Saline County, IL; Union County, IL; and Williamson County, IL& 1 more.