The Cook County Department of Corrections (CCDOC) operates the Cook County Jail, one of the largest single-site jails in the United States, serving Chicago and surrounding Cook County, Illinois. The main jail complex is located at 2700 South California Avenue in Chicago, IL 60608, with administrative offices downtown at 50 West Washington Street. The CCDOC, run by the Cook County Sheriff's Office, primarily houses adults awaiting trial who could not secure pretrial release and is organized into 10 divisions across a sprawling campus. If you have a loved one held at Cook County Jail, this guide explains how to find them, stay connected, and understand the process.
About the Cook County Department of Corrections
The Cook County Jail is a massive, primarily pretrial detention facility. Because of the size of Cook County (which includes Chicago, the third-largest city in the U.S.), the jail processes an enormous volume of people. Detainees are organized into units called Divisions, and the CCDOC has ten divisions across its campus. Divisions 1 and 3 (and others) are located at 2700 South California Avenue, with the main jail telephone number 773-869-7100. The administrative contact line is 312-603-6444, and the Inmate Information Line is 773-674-2390.
The Sheriff's Office operates the facility, and its website is cookcountysheriff.org. The records-on-file figure associated with this listing reflects historical booking records accumulated over time, not the current population.
An important context: Illinois eliminated cash bail in September 2023 through the Pretrial Fairness Act (part of the SAFE-T Act), making it the first state to fully abolish cash bail. This has significantly changed how pretrial detention works at Cook County Jail — see the pretrial release section below.
How to Find a Detainee at Cook County Jail
The Cook County Sheriff offers an online Individual in Custody Locator at iic.ccsheriff.org, and the county also provides a "Locate an Inmate" service at cookcountyil.gov. You can search by name to find the detainee's booking number, division, and custody status. You can also:
- Call the Inmate Information Line at 773-674-2390 to get a booking number.
- Search PrisonAssist.com for historical booking records.
Have the person's full legal name and date of birth ready. New bookings can take a few hours to appear, so check again later if a name doesn't come up. Once you have the booking number and division, keep them handy — you'll need them for visits, mail, phone calls, and money deposits.
Visiting Someone at Cook County Jail
The CCDOC offers both in-person and video visitation. A visitor application is required:
- Anyone wishing to visit a detainee must complete and submit a Visitor Application to the CCDOC.
- In-person visits are arranged through the Cook County Sheriff's Office website; virtual (video) visits are carried out via Microsoft Teams.
- Visitation timings generally span alternate days from 8:30 AM to 1:30 PM and 3:30 PM to 8:30 PM.
- Guests are typically allowed one 15-minute session each week; detainees are mostly permitted one visit interaction daily.
Bring a valid government-issued photo ID for in-person visits, dress conservatively per the dress code, and ensure minors are accompanied by an approved adult. Because schedules vary by division, always confirm the specific visiting schedule for your loved one's division on the Sheriff's Office website before visiting.
Sending Mail to Cook County Jail
To send mail to a detainee at Cook County Jail, address it as follows:
[Inmate Full Name] & [Booking #]
Cook County Jail
2700 S. California Ave.
Chicago, IL 60608
Include the detainee's full name and booking number for accurate delivery, along with your full return address. All incoming mail is inspected for contraband. Prohibited items include cash, stamps, stickers, glitter, and anything that could carry drugs. The CCDOC may process general correspondence through a scanning system — check the Sheriff's Office website for current procedures. PrisonAssist.com offers a letter service that formats and mails correspondence to meet facility requirements.
Phone Calls from Cook County Jail
The jail uses Securus Technologies for its phone program. The system handles outbound calls only — detainees cannot receive incoming calls. To receive calls:
- Create an account with Securus at securustech.net or by calling Securus customer service.
- Fund your account and register your phone number.
- The detainee can then call you, with charges deducted from your balance.
- All calls are recorded; discussing sensitive legal matters over these lines is discouraged.
PrisonAssist.com can help set up lower-cost calling options to make staying in touch more affordable.
Sending Money and Commissary to Cook County Jail
Every detainee at the CCDOC maintains a personal Trust Fund account. Friends and relatives can deposit money via online or phone deposits through Western Union, MoneyGram, or JailATM.com. Each week, a detainee can purchase up to $100 in clothing and supplies and $100 in food items from the commissary. To deposit:
- Online: Through JailATM.com, Western Union, or MoneyGram.
- By phone: Through the deposit vendor's phone line.
- Lobby kiosk: Where available at the facility.
You'll need the detainee's name and booking number for any deposit. Keep your receipts. Online deposits are typically the fastest, often credited within a few hours.
Pretrial Release at Cook County Jail (No More Cash Bail)
Illinois abolished cash bail in September 2023 under the Pretrial Fairness Act. This fundamentally changed how pretrial detention works at Cook County Jail:
- No money bond: A person can no longer be detained simply because they cannot afford to pay bail. Money is no longer a condition of release.
- Detention hearings: Instead, prosecutors must petition for pretrial detention, and a judge decides whether to detain a person based on whether they pose a specific, real danger or a flight risk — not on ability to pay.
- Conditions of release: Most people are released pending trial, sometimes with conditions such as electronic monitoring, check-ins, or curfews.
This means families navigating Cook County Jail today should focus on the detainee's court dates and detention hearing rather than trying to "post bail." If your loved one is being held, their attorney or a Cook County public defender can advocate for release at the detention hearing. Understanding the new system is crucial — the old cash-bail model no longer applies.
Programs and Services at Cook County Jail
Despite being primarily a pretrial facility, the CCDOC offers significant programming, and the Sheriff's Office has been nationally recognized for its mental health and reentry initiatives:
- Mental Health Services: Cook County Jail is one of the largest mental health care providers in the country by necessity, with dedicated mental health units and screening for all detainees.
- Substance Abuse Treatment: Programs addressing addiction, including medication-assisted treatment.
- Educational Programming: GED preparation and adult education.
- Vocational and Job-Readiness Programs: Skills training and employment preparation.
- Reentry Services: Connections to housing, employment, benefits, and treatment upon release, including programs run in partnership with community organizations.
- Restorative Justice and Youth Programs: Specialized programming for young adults.
Cook County in the Illinois System
Cook County Jail handles pretrial detention for the Chicago area. Individuals who are convicted and sentenced to state prison terms are transferred to the Illinois Department of Corrections (IDOC), where mail, visiting, and phone procedures differ. Track any transfer using the IDOC inmate search at idoc.illinois.gov. The 2023 elimination of cash bail has reduced the jail's pretrial population and shifted the focus to detention hearings and conditions of release. Families can stay informed through the Cook County Sheriff's Office website and organizations like the Chicago Community Bond Fund (now focused on pretrial advocacy) and the Cook County Public Defender's Office.
What the End of Cash Bail Means for Your Family
The 2023 elimination of cash bail in Illinois fundamentally changed how families should approach a loved one's detention at Cook County Jail. Under the old system, families often scrambled to raise money or pay a bondsman to secure release. Under the Pretrial Fairness Act, that is no longer how it works:
- Focus on the detention hearing, not raising money. Whether your loved one is released now depends on a judge's decision at a detention hearing — based on dangerousness or flight risk — not on your ability to pay. There is nothing to "post."
- Work with the defense attorney. The most important advocate at the detention hearing is the defense attorney or Cook County public defender. Provide them with information that supports release — stable housing, employment, family ties, and community support.
- Understand conditions of release. If released, your loved one may face conditions like electronic monitoring, curfews, or check-ins. Understanding and helping them comply with these conditions prevents new problems.
Mental Health, Programming, and Reentry at Cook County
Cook County Jail has, by necessity, become one of the largest mental health care providers in the nation — a reflection of how deeply mental illness and the justice system intersect. The Sheriff's Office has been recognized for its mental health screening, dedicated treatment units, and diversion efforts that aim to redirect people with mental illness toward treatment rather than incarceration. The jail also offers substance abuse treatment, education, vocational training, and extensive reentry services in partnership with community organizations. Families can support a loved one by ensuring the jail is aware of any mental health or medical needs, encouraging participation in available programming, staying in regular contact through Securus, and helping plan for a stable, supported return to the community. If your loved one is later convicted and sentenced to state prison, they will transfer to the Illinois Department of Corrections, where you can track them via idoc.illinois.gov and where a separate set of visiting, mail, and phone procedures will apply.
Navigating Cook County Jail's Size and Divisions
Cook County Jail's sheer scale — one of the largest single-site jails in the nation, organized into ten divisions across a large campus — can make it disorienting for families. Each division houses different populations based on security level, gender, medical or mental health needs, and other factors, and each may have its own visiting schedule and procedures. When you locate your loved one through the Individual in Custody Locator, note their division, as this determines where and when you can visit and how to direct communications. Division assignments can change if a person's classification or needs change, so check periodically. The Cook County Sheriff's Office website provides division-specific information, and the Inmate Information Line (773-674-2390) can help clarify where someone is held and how to reach them. Given the jail's role as a major mental health provider, families should proactively inform staff of any mental health, medical, or medication needs to ensure continuity of care during detention.
Support Resources for Families
- Inmate Information Line: 773-674-2390
- Administrative Line: 312-603-6444
- Main Jail (Divisions): 773-869-7100
- Individual in Custody Locator: iic.ccsheriff.org
- Securus (Phone): securustech.net
- Money Deposits: JailATM.com, Western Union, MoneyGram
- Cook County Public Defender: for detention hearings and representation
- PrisonAssist.com: Inmate search, letter service, care packages, phone help
Inmate service providers at Cook County Sheriff's Office (CCDOC) - Main Facility
Like most US jails and prisons, Cook County Sheriff's Office (CCDOC) - Main Facility relies on private companies for phone calls, video visits, money transfers, and care packages, each with its own fees and sign-up steps. Nationwide the most common providers are Securus and ViaPath (GTL) for calls and video, JPay and Access Corrections for sending money, and Access Securepak for care packages.
Not sure which company serves Cook County Sheriff's Office (CCDOC) - Main Facility? Our inmate service provider directory explains how each one works, what it charges, and how to set up an account before you pay.