Chicago Jail Roster Search
The Chicago jail roster tracks people booked into custody after an arrest anywhere in the city. Chicago does not run its own city jail. All arrests made by Chicago police go through Cook County Jail, the largest single-site jail in the country. If you want to find someone who was picked up in Chicago, you need to search the Cook County inmate locator. The search is free and shows current inmates held on local charges. This page covers how to look up Chicago jail roster records and what tools you can use right now.
Chicago Jail Roster Quick Facts
Search the Chicago Jail Roster Online
The Cook County Sheriff runs the online inmate locator that covers all of Chicago. You can search at iictest.ccsheriff.org to find anyone currently held at Cook County Jail. Type in a first and last name. The system pulls up all matches from the jail roster. Results show the person's full name, date of birth, charges, booking date, bond amount, and housing location within the jail. The tool updates throughout the day as new bookings come in and people are released from custody in Chicago.
There is a second way to reach the same search tool. The Cook County government site has a page that links to the inmate locator and gives more context about how the jail works. People held at Cook County Jail are either awaiting trial on a pending state criminal charge or serving a sentence of less than a year for a misdemeanor. If a person arrested in Chicago has been sentenced to more than one year for a felony, they get moved to an IDOC state prison. At that point they will not show up on the Chicago jail roster through Cook County. You would need the IDOC offender search instead for state prison records.
The Cook County jail roster covers all of Chicago. The Cook County inmate locator page shows the jail at 2700 S. California Avenue in Chicago, IL 60608.
If someone was just arrested in Chicago, give it a few hours. The booking process takes time. New records may not show on the jail roster right away. The system covers every arrest in Cook County, not just Chicago proper. Suburban arrests from places like Cicero, Evanston, and Oak Park also feed into this same database.
Chicago Police and the Jail Roster
The Chicago Police Department makes the arrests. But Chicago police do not run a jail. Once someone is arrested in Chicago, they are processed and sent to Cook County Jail at 2700 S. California Avenue. The Chicago Police Department headquarters sits at 3510 S. Michigan Avenue, Chicago, IL 60653. You can reach them by dialing 311 within Chicago or by calling (312) 746-6000. The police handle the initial arrest and paperwork. After that, Cook County takes over the custody side.
This is a common point of confusion. People call Chicago PD asking about the jail roster. The police can tell you about an arrest, but they cannot give you real-time custody status. For that, you need the Cook County Sheriff. The sheriff's office manages the jail roster and the inmate locator tool. Call the Cook County Jail directly at (773) 674-7100 if you need to confirm whether someone is still in custody after a Chicago arrest. Staff there can check the jail roster and tell you the person's status, bond amount, and next court date.
Note: Chicago police process arrests at district stations before transferring people to Cook County Jail, which can add hours to the booking timeline.
Chicago Jail Roster Population Data
Cook County Jail holds a massive number of people at any given time. As of early 2025, the jail population was about 5,750. Another 1,527 individuals were on electronic monitoring. That makes Cook County one of the busiest jail systems in the entire country. A large share of the people on the Chicago jail roster are pretrial detainees who have not been convicted yet. They wait in jail because a judge ordered them held or they could not meet bond terms.
The SAFE-T Act changed how cash bail works in Illinois. Cook County was one of the first places to feel the impact of that shift. Some defendants who used to sit in jail waiting for trial now get released under new pretrial conditions. The jail roster reflects those changes. Bond hearings happen at the courthouse connected to the jail. The decisions made there directly affect who stays on the Chicago jail roster and who goes home to wait for their court date.
Under 5 ILCS 140, Section 2.15, arrest reports in Illinois must include the person's name, age, address, charges, and the time and place of the arrest. If the person is in jail, the report must also show when they were received, discharged, or transferred. These reports must be given within 72 hours of the arrest. This law is what makes the Chicago jail roster a public record that anyone can access.
Visiting Someone on the Chicago Jail Roster
Cook County Jail requires a visitor application before your first visit. You have to fill it out and submit it through the sheriff's office. Once the application is approved, you can schedule in-person visits. The jail also has attorney virtual visitation for legal counsel. There are strict rules about what you can bring and wear. Identification is required for everyone who visits.
If you plan to visit someone on the Chicago jail roster, call ahead first. Confirm the person is still in custody. Check the current schedule. Rules can change during lockdowns or other events. Cook County Jail is huge. It has multiple housing areas spread across a 96-acre campus on the West Side of Chicago. The person you want to visit may be in a specific division, so ask where to go when you call. The jail phone number is (773) 674-7100.
Chicago Jail Roster vs State Prison
There is a key difference between the Chicago jail roster and state prison records. Cook County Jail holds people on local charges or short sentences. IDOC holds people convicted of felonies with sentences over one year. These are two separate systems. They do not share a database.
If you search the Chicago jail roster and find nothing, the person may have been transferred to a state prison. The IDOC offender search covers everyone in the state prison system. IDOC results show the person's name, IDOC number, date of birth, current facility, admission date, and projected discharge date. You can also call IDOC at 217-558-2200 for help. Under 730 ILCS 5, the Unified Code of Corrections governs how state inmate records are maintained. If someone was arrested in Chicago and you cannot find them on the Cook County jail roster, always try the IDOC search next.
The Illinois Criminal Justice Information Authority also tracks broader criminal justice data across the state. ICJIA compiles statistics and publishes reports on incarceration trends in Illinois. This can be useful if you need data beyond a single inmate lookup on the Chicago jail roster.
Note: The Illinois State Police Sex Offender Registry is a separate search system from the jail roster and covers registered sex offenders statewide.
Cook County Jail Roster
Chicago falls within Cook County. All Chicago arrests are processed through the Cook County jail system. Visit the full Cook County page for more details on the sheriff's office, jail contact information, search tools, and visiting rules that apply to every Chicago arrest.
Nearby Illinois Cities
Other major cities near Chicago also route their arrests through county jail systems. Check these nearby cities for local jail roster details.