The Illinois Department of Corrections runs the search for people in Illinois state prisons. Here is how to use it, what it covers, and where to look if the person is not there.

Agency
Illinois Department of Corrections
Official search
Individual in Custody Search

Open the Individual in Custody Search

The Illinois Department of Corrections (IDOC) runs a public search called Individual in Custody Search.

  • Illinois calls people in its prisons "individuals in custody", so the search goes by that name.

Illinois state prisons we list

We do not copy the Illinois prison inmate list yet. These are the state prisons in our Illinois directory, with address, phone and visiting basics. Use the department's search above to find a person.

Which IDOC do you need?

"IDOC" is short for more than one state's corrections department, and each one searches only its own state. This page is about the Illinois Department of Corrections. If the person was sentenced in another state, use that state's page:

State prison, county jail or federal prison?

The Illinois Department of Corrections holds people serving state prison sentences. Someone arrested in the last few days is almost always in a county jail instead, and will not show up in the state prison search yet. For a recent arrest, start with the county: open our Illinois page and pick the county where the arrest happened.

People sentenced for federal crimes are held by the Federal Bureau of Prisons, which has its own search. See federal inmate search (BOP).

After you find them

Questions

Someone was just arrested in Illinois. Will they be in the IDOC search?

Usually not. People who were just arrested are held in a county jail first. They are moved to a state prison only after a sentence to state prison. Check the county jail where the arrest happened.

What does IDOC stand for?

It depends on the state. The Idaho Department of Correction, the Illinois Department of Corrections and the Indiana Department of Correction all use IDOC on their own websites, and people also use it for the Iowa Department of Corrections.

Can one IDOC search find people in another state?

No. Each department only lists people in its own state system. Search the state where the person was sentenced.

Is searchinmates.org part of the Illinois Department of Corrections?

No. searchinmates.org is a private website. It is not affiliated with the Illinois Department of Corrections or any government agency. The department's own search is the source of record.

Sources

We opened each of these pages on October 14, 2026. Rules and numbers change, so check the source before you act.

searchinmates.org is a private website, not a government site, and is not affiliated with any agency named here. This page is general information, not legal advice. Removing a record from our site is always free: request removal.