The Jail System
Illinois has 90 jails in 102 counties. The jail population in 2021 was 15,377.
The Prison System
As of December 31, 2021, the number of prisoners under the jurisdiction of the State of Illinois correctional authorities was 28,469 located in 42 state prisons and held in the custody of private prisons or local jails. Illinois operated facilities with a budget of $1,693,861.
The Community Corrections System
As of December 31, 2021, Illinois community corrections population was 87,593 under probation and 25,103 under parole.
Methodology
The National Institute of Corrections depends on publicly available information to provide the information on this page.
The statistics for budgets, employee positions, county numbers, and state prison facilities data come from state departments of corrections, other state reports and state agencies. If data is missing for a state, then we were unable to find that information.
The data on prison population come from the Prisoner in 2021 report released by the Bureau of Justice Statistics (BJS). The report includes the count of prisoners in the unified systems of Alaska, Connecticut, Delaware, Hawaii, Rhode Island, and Vermont.
Violent and property crime rates are provided by the Vera Institute.