Cook County Sheriff's Police

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The Cook County Sheriff’s Police Department is the third largest police department in the State of Illinois, with more than 500 sworn officers and more than 100 civilian personnel. The Department is responsible for patrolling the 72 square miles of unincorporated neighborhoods, businesses and industrial areas where more than 109,000 people reside. 

The Sheriff’s Police has a number of units within the Department available to other law enforcement agencies for use on a mutual aid basis, including the Bomb Unit, Evidence Technicians, Gang Crimes/Narcotic and Vice. In addition, the Department has police officers assigned to several federal agencies, including the FBI and DEA, where officers from both agencies work together on cases of regional and national scope. The Department operates one of six accredited police training academies statewide that most local police departments utilize and also has a Fugitive Warrants Division responsible for holding and maintaining thousands of active, outstanding arrest warrants for people wanted for crimes committed throughout Cook County.