The correctional facility was built in the 1920s and has become the largest county jail in the United States. Over 100,000 detainees are admitted to the jail pending their trials each year. The facility covers more than eight city blocks and contains ten divisions, a health facility, two education departments, a commissary agency, and four onsite Sheriffs departments.
Cook County Jail was built in the 1920s and now houses over 9,000 men and women. The jail has held infamous criminals such as Al Capone, Larry Hoover, Tony Accardo, Frank Nitti, Jeff Fort, Richard Speck, and John Wanye Gacy and the Chicago Seven. The jail is one of three sites in the state where prisoners have faced execution by the electric chair in the state of Illinois.