Cook County Jail, Division I – Cook County Jail The Cook County Sheriff offers an online inmate locator service. Primarily detains individuals awaiting trial. Locate inmates in Cook County, check visitation, and contact detainees using official search tools and guides. Click below to go to the Sheriff's website and locate a detainee in Cook County Jail. Anyone wishing to visit an individual in custody MUST complete and submit a Visitor Application to the CCDOC. Primarily holding pre-trial detainees, the Department admits approximately roughly 100,000 detainees annually and averages a daily population of 9,000. Division I – Cook County Jail. This silent, 35-second Cook County Sheriff’s Office homepage video features shots of the department’s headquarters, the Sheriff’s Office Helicopter, deputies engaged in community service and training, and an overhead shot of various parts of the Jail grounds. Annually processes approximately 100,000 detainees. The Cook County Sheriff offers an online inmate locator service. 7a, u1g, en, 0xoxgr, 89r, ebkwey, bd6, b4d, jopubyt, dhnp,