Search Illinois Inmate Population
The Illinois inmate population includes tens of thousands of people held in state prisons and county jails across all 102 counties. You can search for current inmates through the Illinois Department of Corrections online database or through local county sheriff websites. Each county runs its own jail and keeps a roster of who is in custody right now. The state tracks all inmates sent to prison after sentencing as well. This page covers how to find Illinois inmate population data, which search tools are free to use, and what records you can get through public access and FOIA laws. Both state and county level resources are listed below for searching Illinois inmate records.
Illinois Inmate Population Quick Facts
Illinois Inmate Population Search
The Illinois Department of Corrections runs the main search tool for state prison inmates. It is free to use. Anyone can look up an inmate without making an account. The IDOC database at idoc.illinois.gov/offender/inmatesearch.html lets you search by last name, IDOC number, or date of birth. Just type in what you know and the system shows results right away. The IDOC states this database is "for the general public and law enforcement to promote the interest of public safety" in Illinois.
If you do not find someone, there are a few reasons why. The inmate may be held under a different name. They may have been discharged already. Or they could be in a county jail rather than state prison. County jails are separate from the IDOC system. For help with a search, call the IDOC at 217-558-2200 during business hours (8am to 4pm, Monday through Friday). Law enforcement can use a dedicated line at 1-888-446-9103 for Illinois inmate population inquiries.
The IDOC posts inmate data and facility info on its main site at idoc.illinois.gov.
The site lists contact details for all state prison facilities in Illinois and links to the inmate search tool. IDOC headquarters is at 1000 Converse Street in Springfield, IL 62794. The Chicago office is at 555 W. Monroe, 6th Floor, Chicago, IL 60661. You can also reach constituent services at DOC.Constituent.Services@illinois.gov for general questions about the Illinois inmate population.
Illinois Inmate Records Requests
You can request Illinois inmate records through the Freedom of Information Act. Under 5 ILCS 140, the state must share public records when someone asks in writing. The law says "each public body shall make available to any person for inspection or copying all public records." The IDOC has a FOIA officer at 1301 Concordia Court in Springfield, IL 62794. You can also email requests to DOC.FOIARequest@illinois.gov or fax them to 217-558-5612.
Each request should state you are asking under the Freedom of Information Act. Be specific about what records you need. The agency has five business days to respond. They can extend that by five more days with written notice to you. The first 50 pages of any response are free. Extra pages cost the actual printing expense. All requests are processed in the order they come in.
The full FOIA process for Illinois inmate records is on the IDOC site at their FOIA information page.
FOIA covers general records like daily inmate population counts, facility reports, and transfer logs. But some records are off limits. Under 730 ILCS 5/3-5-1(b), master record files are "confidential and access shall be limited to authorized personnel of the respective Department or by disclosure in accordance with a court order or subpoena." Medical, psychological, and disciplinary files for Illinois inmates fall under this rule. You need a court order to see those.
Illinois State Prison Inmate Population
Illinois runs more than 16 state correctional facilities. These range from maximum security prisons to minimum security camps and re-entry centers. The total state prison inmate population is about 28,991 adults. The IDOC publishes data sets on prison admissions, exits, and overall population trends. For data requests, contact Sharon Shipinski at (217) 558-2200 ext. 6550.
Maximum security facilities in Illinois include Menard Correctional Center in Menard at (618) 826-5071, Pontiac Correctional Center in Pontiac at (815) 842-2816, and Lawrence Correctional Center in Sumner at (618) 936-2064. Medium security sites include Dixon CC at (815) 288-5561, Graham CC in Hillsboro at (217) 532-6961, Hill CC in Galesburg at (309) 343-4212, Illinois River CC in Canton at (309) 647-7030, and Western Illinois CC in Mt. Sterling at (217) 773-4441. Big Muddy River CC in Ina is also medium security at (618) 437-5300. Logan Correctional Center in Lincoln serves as the multi-level facility for women in the Illinois inmate population at (217) 735-5581.
Minimum security and specialized sites include Robinson CC at (618) 546-5659, Jacksonville CC at (217) 245-1481, Vienna CC at (618) 658-8371, and Southwestern Illinois CC in East St. Louis at (618) 394-2200. Northern Reception and Classification in Joliet at (815) 727-3607 handles intake. Kewanee Life Skills in Kewanee at (309) 852-4601 focuses on re-entry. Always call the Lockdown Hotline at (877) 840-3220 before visiting any Illinois prison. Hours and access can change without warning.
Note: Visitation at Illinois state prisons requires advance signup and two forms of ID.
Illinois Prisoner Review Board
The Illinois Prisoner Review Board handles parole hearings, revocation hearings, early discharge reviews, medical release hearings, youthful parole hearings, and clemency petitions. Their office is at 1001 N. Walnut Street in Springfield, IL 62702. Call 217-782-7273 for general info. The PRB plays a key role in how the Illinois inmate population changes over time. Parole and discharge decisions affect who stays in custody and who gets released.
The PRB posts hearing schedules and board information at prb.illinois.gov.
Victims of crime can call the toll-free line at 1-800-801-9110 to get hearing dates and updates on specific inmates in Illinois. For legal questions about PRB decisions, email PRB.Legal2@illinois.gov or fax to 217-524-0012. All hearings are part of the public record.
Illinois Inmate Population Access Laws
Several Illinois laws control what inmate population records are public and what stays sealed. The main law is the Freedom of Information Act at 5 ILCS 140. It says "all records in the custody or possession of a public body are presumed to be open to inspection or copying." The burden falls on the agency to show why a record cannot be shared. Response time is five working days from receipt of the request.
The full text of the FOIA statute is on the Illinois General Assembly website.
This law covers all public records held by state and local agencies in Illinois. But clear limits exist for certain inmate records. Under 730 ILCS 5/3-5-1, master record files are confidential. These include admission summaries, medical records, psychological reports, and disciplinary records. Access requires authorized personnel, a court order, or a subpoena. The Uniform Conviction Information Act at 20 ILCS 2635 limits public release to conviction records only. Arrest records without a conviction may have restrictions under the Criminal Identification Act at 20 ILCS 2630. Under 5 ILCS 140/2.15, arrest reports must include specific information like the person's name, age, address, and photograph along with details of any charges. The State Records Act at 5 ILCS 160 also governs retention of these documents. These laws shape what part of the Illinois inmate population data you can actually access.
Illinois Inmate Tracking and Alerts
VINELink is a free tool that lets you track inmates and get alerts when their status changes. You can sign up for phone, email, or text alerts. It works for both state prison and county jail inmates across Illinois.
Register to track Illinois inmates at vinelink.com.
The service is free for anyone in Illinois. VINELink is useful for victims and family members who need to know if an inmate has been released, transferred, or has a court date. Registration takes a few minutes. You can track more than one inmate at a time. The system runs 24 hours a day, 7 days a week. It covers both the state prison inmate population and local county jail populations across Illinois.
County Jail Inmate Population in Illinois
Most inmates in Illinois are held at the county level. Each of the 102 counties runs its own jail under the county sheriff. Larger counties like Cook, DuPage, and Lake have online inmate search tools on their sheriff websites. Smaller counties may require a phone call to get inmate information. County jails hold people waiting for trial and those serving short sentences under one year.
The Illinois inmate population at the county level is separate from the state prison system. If someone was just arrested, check the county jail first. State prison holds only people who have been sentenced. Some of the largest county jails include Cook County at iic.ccsheriff.org with about 5,750 detainees, Will County at willcosheriff.org with over 1,000 beds, and Winnebago County at winnebagosheriff.com with 1,100 beds. Most county sheriff offices respond to FOIA requests under 5 ILCS 140 as well. The first 50 pages are free and the response time is five business days.
Browse Illinois Inmate Population by County
Each county in Illinois has its own sheriff's office that manages the local jail and inmate population. Pick a county below to find local search tools, contact info, and resources for inmate records in that area.
Illinois Inmate Population in Major Cities
Residents of major Illinois cities are held at their county jail after arrest. Pick a city below to find which county handles inmates for that area and how to search for someone in custody.