Illinois, county records

Cook County, Illinois Public Records

Find the right office in Cook County. Court cases, deeds and parcels, sheriff and jail records, vital records and county filings, each linked to the office that keeps them, with addresses and phone numbers.

Official sources first Free directory Links checked Sep. 13, 2026 Mobile friendly

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Most requested Cook County records

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Local record guide

About public records in Cook County

Useful local context without burying the official record links above.

County profile

Cook County at a glance

State
Illinois
County seat
Chicago
Population
5,180,493
Area
1,635 sq mi
Founded
1831
Cities and towns
83

Cook County offices and records

Sheriff & Law Enforcement. Cook County Sheriff's Office is responsible for law enforcement in unincorporated areas of Cook County and operates Cook County Jail. The office also has specialized divisions, including the Court Services Department and the Department of Corrections, making sure of full law enforcement and correctional services.

Police Departments. Cook County is served by several law enforcement agencies, including Cook County Sheriff's Office and municipal police departments such as the Chicago Police Department, Evanston Police Department, and Cicero Police Department. Each department has jurisdiction over its respective city or area, while the Sheriff's Office handles unincorporated regions.

Law Enforcement & Arrests. Cook County Sheriff's Office, located at 50 West Washington Street, Chicago, IL 60602, is the primary law enforcement agency for Cook County's unincorporated areas and operates one of the largest jail systems in the nation. Cook County Department of Corrections operates Cook County Jail, located at 2700 South California Avenue, Chicago, IL 60608, housing pre-trial detainees and sentenced misdemeanor offenders. Municipal police departments operate throughout Cook County's 134 municipalities, including the Chicago Police Department (the second-largest municipal police force in the United States), Evanston Police Department, Oak Park Police Department, Schaumburg Police Department, Skokie Police Department, Des Plaines Police Department, Palatine Police Department, Arlington Heights Police Department, and dozens of other local departments serving their respective communities. Requests can be submitted to individual police departments or the Sheriff's Office, though some records may be exempt if they interfere with ongoing investigations or contain information protected under Illinois law. The Chicago Police Department operates a separate records request system through their FOIA office at 3510 South Michigan Avenue, Chicago, IL 60653, and many suburban departments maintain their own records request procedures.

Criminal Records. Cook County Clerk of the Circuit Court maintains these records, while the Illinois State Police provide statewide criminal history background checks.

Arrest Records. Arrest records in Cook County are maintained by Cook County Sheriff's Office and various municipal police departments.

Jail & Inmate Records. Inmate lookup is available through Cook County Sheriff's website, allowing the public to search for detainees.

Mugshots & Booking Photos. Mugshots in Cook County are taken and retained by Cook County Sheriff's Office during the booking process. These booking photos are accessible through the Sheriff's website, where the public can search for mugshots of individuals currently or previously detained.

Straight answers

Cook County public-records FAQs

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Where can I find mugshots or booking photos in Cook County, Illinois?

Mugshots or booking photos in Cook County, Illinois, are available through the Cook County Sheriff's Office. While the Sheriff's website does not directly display mugshots, you can request them by contacting the Records Division. Some third-party websites may have access to these images, but official requests should be directed to the Sheriff's Office.

How do I get a criminal background check in Cook County, Illinois?

To obtain a criminal background check in Cook County, Illinois, you should contact the Illinois State Police Bureau of Identification. The process involves submitting fingerprints and completing the required forms, which can be done through an authorized live scan fingerprint vendor. The results will include any criminal records associated with the individual in Illinois.

How can I look up sex offenders in Cook County, Illinois?

You can look up sex offenders in Cook County, Illinois, by accessing the Illinois State Police Sex Offender Registry. This online database allows you to search by name, city, or zip code to find registered sex offenders in the area. The registry provides detailed information about the offenders, including their offenses and current addresses.

How do I register to vote in Cook County, Illinois?

You can register to vote in Cook County online at the Illinois State Board of Elections website (ova.elections.il.gov), by mail, or in person at the Cook County Clerk's Elections Division at 69 West Washington Street, Suite 600, Chicago, IL 60602. Illinois requires registration at least 27 days before Election Day, though grace period registration is available starting 28 days before through Election Day at designated locations. Vote-by-mail applications can be submitted online through the County Clerk's website at cookcountyclerk.com/elections. Note that Chicago residents should contact the Chicago Board of Election Commissioners at chicagoelections.gov for city-specific voting information.

How do I look up property records in Cook County, Illinois?

Property records in Cook County can be searched for free through the Cook County Recorder of Deeds website at cookrecorder.com, which provides access to deeds, mortgages, liens, and other recorded documents. The county Chief County Assessment Officer at cookcountyassessor.com offers property tax assessment information, exemptions, and appeals data. For parcel information including maps and zoning, use the county GIS viewer at cookviewer.cookcountyil.gov. Certified copies of recorded documents can be obtained from the Recorder's office at 118 North Clark Street, Chicago, IL 60602, for $15 for the first page and $3 for each additional page.

How do I get a birth or death certificate in Cook County, Illinois?

Birth and death certificates for events occurring in Cook County are available from the Cook County Clerk's Vital Records Division at 118 North Clark Street, Chicago, IL 60602, phone (312) 603-7790. The fee is $15 for the first copy and $2 for each additional copy of the same record ordered at the same time. In-person requests are typically processed immediately, while mail requests take approximately 4-6 weeks. You can also order online through VitalChek at vitalchek.com for an additional service fee, or request records from the Illinois Department of Public Health in Springfield. Valid photo identification and proof of eligibility (family relationship or legal interest) are required.

How do I find business license records in Cook County, Illinois?

Business licenses in Cook County are managed by individual municipalities; businesses in Chicago can be searched through the City of Chicago at chicityclerk.com, while suburban municipalities maintain separate licensing systems. For statewide business entity searches (corporations, LLCs, partnerships), use the free Illinois Secretary of State database at ilsos.gov/corporatellc. The Cook County Clerk's office at 118 North Clark Street handles assumed name (DBA) registrations for unincorporated areas, phone (312) 603-5656. Professional licenses are managed by the Illinois Department of Financial and Professional Regulation at idfpr.com with searchable online databases.