Cook County

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The Cook County Sheriff’s Office is responsible for maintaining the Cook County Department of Corrections, which involves a single site stretching eight city blocks. Housing nearly 100,000 detainees each year, the Cook County Jail is among the largest jail facilities in the United States. The Cook County Sheriff’s Office takes pride in ensuring the safety of the correctional facility’s staff, Cook County inmates and citizens by providing a safe, secure, efficient and humane county jail. The highly-trained and dedicated staff guarantee safety for both Cook county inmates and visitors during inmate meetings. With the use of the Cook County Inmate Locator, general information can be acquired as well as the facility’s visitor information.

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How do I find if someone is still in a Cook County Jail?

To find an inmate's current status, you can you can call 773-674-5245 or use the online search.

How can I visit an inmate in a Cook County Jail?

A valid photo id is required to visit inmates in Cook County. Visitation schedules can be found here.

How can I mail a letter to someone in a Cook County Jail?

First make sure the individual is still in jail by using the county's online search here. Then you can get the address to mail a letter to here.


The information on this web site is provided to assist users in obtaining information about county jail arrests. Any use of this data for any other purpose may be illegal. While the information on this website is believed by the website owner to be reliable, it is provided „as is“ with no warranties or guarantees regarding its accuracy. An arrest or booking does not mean that the individual has been convicted or is guilty of the crime. You are advised to contact the appropriate governmental agency to ascertain and verify the information contained on this website. By using this web site, you agree to these terms of usage without warranty.