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Statistics for the State of Illinois

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Overview of Illinois's Correctional System Illinois

The Jail System

There are 90 jail facilities in the state's 102 counties with a capacity to hold nearly 20,000 inmates. Cook County facilities hold nearly 9,800. The state DOC manages a jail inspection and standards compliance program.

The Prison System

The Illinois Dept. of Corrections houses 45,215 inmates in 37 facilities and camps, in addition to 7 transition centers. The Dept. has 14,200 employees. (Incarceration rates were not available from the Bureau of Justice Statistics. Estimates have been inserted.)

The Community Corrections System

70 county probation agencies (some multi-county) supervised 142,790 probationers in 2007. State oversight and some funding comes through the Admin. Office of the Courts. The DOC's Community Services Division supervised 33,354 parolees.
2007 Crime Rate for Illinois
The crime rate in Illinois is about 7% lower than the national average rate. Property crimes account for around 84.6% of the crime rate in Illinois which is 10% lower than the national rate. The remaining 14.3% are violent crimes and are about 12% higher than other states. The following graph shows how Illinois compared to the rest of the states.

State Crime Rates (Per 100,000 People)

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Illinois National Avg.
Crime Rates (2007) 3,469 3,731
Violent Crimes 533 467
Property Crimes 2,936 3,264
2004 Corrections Population
Illinois has 252,776 adults under correctional supervision (prisons, jails, probation, and parole). The supervision rate (number of offenders per 100,000 people) is about 1% higher than the national rate.

State Population Rates (Per 100,000 People)

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Illinois National Avg.
Population Rate (2004) 2,609 2,572
2007 Incarceration Information
Illinois has a rate 17% lower than than the national average of incarcerated adults per 100,000.

Incarceration Rate (Per 100,000)

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Illinois National Avg.
Incarceration Rate (2007) 371 447
2007 Probationers
Illinois has a rate 21% lower than than the national average number of probationers per 100,000 people.

Probationers (Per 100,000)

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Illinois National Avg.
Probationer Rate (2007) 1,471 1,863
2007 Parolees
Illinois has a rate 7% higher than than the national average number of parolees per 100,000 people.

Parolees (Per 100,000)

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Illinois National Avg.
Parolee Rate (2007) 344 319
2008 Corrections Percentage of Total State Government Expenditures
Taxpayers paid 9% lower than than the national average in 2008.

Percentage Spent on Corrections

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Illinois National Avg.
% Spent on Corrections (2008) 6.1% 6.7%

Data Sources:

  • The PEW Center on the States
  • Federal Bureau of Investigation, U.S. Dept. of Justice
  • Bureau of Justice Statistics, U.S. Dept. of Justice
  • American Jail Assoc.
  • American Correctional Assoc.
  • State Government Websites
  • State-provided information
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