There are 204 Jails & Prisons in Illinois, serving a population of 12,854,526 people in an area of 55,505 square miles. There is 1 Jail & Prison per 63,012 people, and 1 Jail & Prison per 272 square miles.
The state of Illinois is ranked 44th in Jails & Prisons per capita, and 28th in Jails & Prisons per square mile.