List of law enforcement agencies in Illinois

Updated on Sep 28, 2024

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This is a list of law enforcement agencies in the state of Illinois.

According to the US Bureau of Justice Statistics' 2008 Census of State and Local Law Enforcement Agencies, the state had 877 law enforcement agencies employing 41,277 sworn police officers, about 321 for each 100,000 residents.

State agencies

Illinois Attorney General's Office

Department of Investigations

Illinois Attorney General Police

Illinois Commerce Commission Police

Illinois Department of Corrections

Illinois Department of Human Services Police Department

Illinois Department of Mental Health Police

Illinois Department of Natural Resources

Illinois Conservation Police

Illinois Department of Revenue Police

Bureau of Criminal Investigations

Illinois Gaming Board

Illinois Secretary of State

Illinois Secretary of State Capitol Police

Illinois Secretary of State Police

Illinois State Fire Marshal Arson Investigation

Illinois State Police

County Forest Preserve police departments

Cook County Forest Preserve Police Department

DuPage County Forest Preserve Police Department

Kane County Forest Preserve Police Department

Lake County Forest Preserve District - Operations and Public Safety Department

Will County Forest Preserve Police Department

Other county departments

Cook County Hospital Police Department

McHenry County Conservation Police Department

Oak Forest Hospital Department of Public Safety

Vermilion County Conservation Police Department

Special district agencies

Abraham Lincoln Capital Airport Police Department

Chicago Zoological Society Police Department

Effingham Water Authority Police Department

Metra Police Department

Metropolitan Airport Authority of Rock Island County Public Safety

Metropolitan Water Reclamation District of Greater Chicago Police Department

Community or junior college agencies

References

List of law enforcement agencies in Illinois Wikipedia

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