Illinois county jail and IDOC inmate locator to find people in jail and prison using an official inmate searches. . One of the few free searches on the internet is for inmates in jail and prison. Below you'll find the . Cook County Jail inmate search .
Jump to: navigation, search. The Cook County Jail, located on 96 acres (390,000 m2) in Cook County, Illinois, is the largest jail in the United States . On average, the inmate population is 53% Black, 36% Hispanic, and 11% White and other.