The Jail System
Illinois has 92 jails in 102 counties, with a jail population of approximately 20,600.
The Prison System
As of December 31, 2016, the Illinois prison population was 43,657 located in 28 prisons with a budget of $1.3 billion.
The Community Corrections System
As of December 31, 2016, the Illinois community corrections population was -- under probation and -- under parole.