World Prisons
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United States · IL · Chicago

Cook County Jail

Low
Verified 29 May 2026
Fresh · 0d ago

Data is aggregated from public sources and may be incomplete or out of date. Always verify with primary sources before acting on any figure. See data sources.

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How to send mail, money, and visit Cook County Jail

Step-by-step guidance using the United States system — addresses, money services, visit booking, what to bring on your first visit.

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Photograph of Cook County Jail

Gallery

From Wikimedia Commons (CC-BY-SA where not otherwise stated).

  • 20050609 23 Cook County Jail complex (11245534363).jpg

    Photo by David Wilson from Oak Park, Illinois, USA via Wikimedia Commons (CC BY 2.0)

  • Cook County Jail complex, Chicago.jpg

    Photo by David Wilson from Oak Park via Wikimedia Commons (CC BY 2.0)

  • Illustration of Patrick Eugene Prendergast in Cook County Jail prison cell.png

    Photo by unknown for Chicago Tribune via Wikimedia Commons (Public domain)

  • Patrick Eugene Prendergast in prison cell at Cook County Jail.jpg

    Photo by Chicago Inter Ocean via Wikimedia Commons (Public domain)

  • Patrick-prendergast-2.jpg

    Photo by unknown via Wikimedia Commons (Public domain)

  • Prendergast photo Christison Crime criminals 1898 (a).jpg

    Photo by unknown via Wikimedia Commons (Public domain)

  • Prendergast photo Christison Crime criminals 1898.jpg

    Photo by unknown via Wikimedia Commons (Public domain)

Background

The Cook County Jail, located on 96 acres (39 hectares) in South Lawndale, Chicago, Illinois, is operated by the Sheriff of Cook County. It is sometimes referred to as 26th and Cal or Hotel California, as its address is on California Avenue. A city jail has existed on this site since after the Great Chicago Fire of 1871, but major County prisoners were not generally collocated here until closure of the old Hubbard Street Criminal Court Building and jail in 1929. Since then, a 1920s neoclassical and art deco courthouse for the criminal division of the Cook County Circuit Court has operated at the South Lawndale complex. As of 2017, Cook County operated the third-largest jail system in the United States by inmate population (after the Los Angeles County and New York City jail systems).

Source: Wikipedia article lead, CC-BY-SA.

Capacity

Current population

Occupancy

Year opened

Operational

Facility profile

Operator

Cook County Department of Corrections

Population held

Mixed/unknown

Opened

Region

IL

Security level

Death-row facility

No

Conditions

No conditions summary available yet.

Visiting

No visiting information available.

Mailing

No mailing information available.

Practical info

Contact the operator's website for inmate-specific procedures.

Known issues

No major issues documented in our database.

Contact & address

2700 South California Avenue, Chicago 60623

Conditions Risk Score

Derived signal — not a judgement. How it's calculated

Insufficient data
We don't have enough public data on this facility to score it. Have something to add? Send us a correction.

Data completeness

34%

How many of our profile fields are populated. We surface this so families and researchers know the limits.

Sources