Cook County Inmate Population Overview
The Cook County Department of Corrections is the main county jail system. It is operated by the Cook County Sheriff's Office at the California Avenue jail campus. The Sheriff daily report inspected for this build listed a jail population of 5,934 on June 9, 2026, plus 222 people in community corrections. Those two groups made 6,156 people under Sheriff custody, but they are not the same thing. Jail population means people counted in the jail population for that report date. Community corrections includes people under Sheriff custody outside normal behind-the-walls housing.
Cook County also has state and federal custody facilities that are easy to confuse with the county jail. Crossroads Adult Transition Center and North Lawndale Adult Transition Center are Illinois Department of Corrections adult transition centers, not Sheriff jail divisions. Metropolitan Correctional Center Chicago is a Federal Bureau of Prisons detention facility. A person can move from arrest, to Cook County Jail, to court, to IDOC, BOP, or ICE channels depending on the case. That is why one roster is not enough for every Cook County custody search.
Cook County Inmate Population Statistics
The most current local count in the research comes from the Sheriff daily population report dated June 9, 2026. The year-over-year figures come from the Cook County 2025 Annual Performance Report, which uses average daily population as a performance metric. The older county service page still mentions roughly 100,000 annual admissions and an average daily population of 9,000, but current Sheriff and county performance sources show lower recent counts, so that older number should be read as historical context.
| Measure | Figure | Source / Date |
|---|---|---|
| Under custody of Sheriff total | 6,156 | Sheriff Daily Report, June 9, 2026 |
| Jail population | 5,934 | Sheriff Daily Report and CCDOC page, June 9, 2026 |
| Community corrections | 222 | Sheriff Daily Report, June 9, 2026 |
| 2025 average daily population | 5,686 | Cook County 2025 Annual Performance Report |
Cook County Inmate Population Trends
The county performance report shows the Cook County jail average daily population falling from 2022 through 2024, then rising in 2025. Release length of stay also shifted. People released from CCDOC custody averaged 72 days in 2022, 76 days in 2023, 76 days in 2024, and 70 days in 2025. That mix matters because a jail count is shaped by arrests, charging decisions, detention hearings, sentencing, transfers, and release processing, not by one rule alone.
| Year | Average Daily Population / Metric | Notes |
|---|---|---|
| 2022 | 5,670 | CCDOC ADP, county performance report |
| 2023 | 5,307 | CCDOC ADP, county performance report |
| 2024 | 4,874 | CCDOC ADP, county performance report |
| 2025 | 5,686 | CCDOC ADP, county performance report |
| 6/9/2026 | 5,934 | Point-in-time Sheriff daily jail population |
Cook County Jail Population Makeup
The Sheriff report separates people physically in jail from people in community corrections. It also uses a "Behind the Walls" definition for people housed under Sheriff custody all day and every day. That category includes divisional male and female jail populations, outside counties, hospital, PRC, Women's Residential, and VRIC categories. The report's gender chart for June 9, 2026 listed the jail population as 92.3% male and 7.7% female. Community corrections was 88.3% male and 11.7% female.
Age distribution was also published in the daily report. The largest jail age groups were 25 to 34 at 34.3%, 35 to 44 at 25.0%, and under 25 at 21.4%. Smaller groups were 45 to 54 at 12.1%, 55 to 64 at 5.6%, 65 to 74 at 1.4%, and 75 or older at 0.2%. Race chart extraction from the PDF did not preserve every label cleanly, so race percentages should be checked visually against the official PDF before building a polished race chart.
Cook County Jail Capacity
The Sheriff division page gives useful building-level capacity facts but does not publish one current official campus-wide rated capacity number in the sources reviewed. Division II was designed for 870. Division III Annex has capacity 434. Division VI has capacity 992. Division IX was designed for 1,056. Division X was designed for 768. Division XI has capacity 1,536. Division XVI has capacity 200. Some capacity labels are design capacity, while others describe active current use, so they should not be summed into one official jail capacity without a clear source.
The jail campus is also larger than a simple bed count. Sheriff and county sources describe CCDOC as a 96-acre, eight-city-block campus with active divisions, medical and mental-health housing, programming areas, visitation entrances, outside-county and hospital categories, and community corrections reporting. Closed or inactive housing such as Division I, Division III, and Division IV should not be counted as active public jail capacity unless the Sheriff reactivates it.
Cook County Inmate Population Laws
Illinois law explains why custody records, jail reports, and booking information exist, but it does not make every field instantly public online. The County Jail Act places county jail custody duties with the sheriff and requires jail records such as calendars and lists. Illinois FOIA gives access to public records unless an exemption applies. 5 ILCS 140/2.15 covers arrest reports and criminal history information, including a photograph when and if available.
Key rule: Public access is not the same as a live public database. The Sheriff locator, phone line, Clerk case search, and FOIA channels each cover a different record set.
Search Cook County Inmate Population
The official Cook County jail roster tool is the Sheriff Individual in Custody Locator. Cook County uses "individual in custody" in many current public tools, while many readers still search for "inmate." The form supports two paths: full first name and full last name, or a Booking ID with no hyphen. The search form is public, but it uses Google reCAPTCHA, which can block automated profile inspection and may affect some users.
- Open the Sheriff Individual in Custody Locator search form.
- Search by full first name and full last name, or use the Booking ID.
- If using Booking ID, enter digits only and omit hyphens.
- Complete the reCAPTCHA and submit the search.
- If no match appears, call 773-674-5245 or check IDOC, BOP, ICE, Clerk, or VINELink routes.
The locator home also connects custody lookup with visitor registration. The Sheriff FAQ indicates a profile/photo area can lead to a "Register online" link for visitation. It is not safe to claim the public profile shows every charge, bond, court date, release date, or housing field because the current profile inventory was not fully verified through reCAPTCHA.
| Field Label | Type | Required | Notes |
|---|---|---|---|
| Full First Name | Text | Yes for name search | Part of "Individual in Custody Name." |
| Full Last Name | Text | Yes for name search | Use the full last name, not initials alone. |
| Booking ID | Text | Yes for booking search | Do not use a hyphen. Example format is digits only. |
| Google reCAPTCHA | Widget | Yes | Required before submission. |
Cook County Roster Screenshot
The Sheriff search form shown in the manifest comes from the official Individual in Custody Locator search page.
The screenshot is useful because it shows the limited search fields. It does not support a search by charge, arrest agency, date of birth, release date, or housing unit.
Cook County Inmate Record Fields
A Cook County jail record starts as a custody and booking record. Confirmed public research shows the locator supports name and Booking ID searches, and the Sheriff's visitation and mail pages show that booking number and housing location are practical identifiers. A full public profile field list was not verified, so field claims must stay narrow. Formal charges and next court dates belong in Clerk and AVN channels, not the Sheriff locator alone.
| Field | What Research Confirms |
|---|---|
| Name | Full first and full last name are required for a name search. |
| Booking ID | Supported as a search field and used for mail and deposits. |
| Photo | Sheriff FAQ language confirms a photo area in the locator workflow. |
| Housing location | Visitation instructions use division and tier/living-unit codes. |
| Charges and court dates | Not verified on the public profile; use Clerk and AVN routes. |
Cook County Custody Lookup Routes
Use the county jail locator when the person is in CCDOC custody. Use the Illinois Department of Corrections Individual in Custody Search when a sentenced person has moved to state prison or an adult transition center. Use the BOP Inmate Locator for federal custody and MCC Chicago. Use ICE ODLS for immigration custody. Use Illinois VINELink for custody and case notifications.
| System | Who It Covers | Cook County Use |
|---|---|---|
| Sheriff IIC Locator | Current Cook County Jail custody | Pretrial and county jail custody search |
| IDOC Search | State prison and adult transition custody | Crossroads and North Lawndale ATCs |
| BOP Locator | Federal inmates from 1982 forward | MCC Chicago and federal custody |
| ICE ODLS | Immigration custody | A-number or biographical search |
Cook County Detention Facilities
The facility map uses four pages because each facility has a distinct operator and lookup route. The county jail campus is searched through the Sheriff. The two adult transition centers are searched through IDOC. MCC Chicago is searched through BOP. No current official over-72-hour ICE detention facility physically in Cook County was confirmed in the research, so no ICE facility page is created.
- Cook County Department of Corrections - Sheriff-run county jail campus for pretrial detainees and county custody.
- Crossroads Adult Transition Center - IDOC adult transition and work-release custody.
- North Lawndale Adult Transition Center - IDOC adult transition custody for reentry and parole preparation.
- Metropolitan Correctional Center Chicago - BOP federal administrative detention facility.
Cook County Inmate Population FAQ
How big is the Cook County inmate population?
The researched Sheriff daily report dated June 9, 2026 listed 5,934 people in the jail population and 222 in community corrections. Counts change daily, so use the date beside the figure.
How do I search Cook County inmates?
Start with the Sheriff Individual in Custody Locator. Search by full first and last name or by Booking ID without a hyphen. If the person is sentenced, federal, or immigration custody, use IDOC, BOP, or ICE instead.
Does the Cook County roster include released inmates?
The research did not find a published retention period for released people on the Sheriff search page. Use Sheriff FOIA for booking records and the Clerk for court files when the live roster no longer answers the question.
What does community corrections mean?
Community corrections is counted under Sheriff custody but is separate from the jail population. Do not compare it to jail bed capacity or assume every person in that count is physically housed behind the walls or assigned to a jail division.
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