Illinois Public Criminal Records Free: Criminal Records Guide

The most useful free route depends on the information you need. A pending criminal case, a historical conviction, a prison record and a sex offender registry entry are different records maintained by different government offices.

This tool identifies the official agency for your search. It does not ask for names, dates of birth or other personal identifiers, and it does not contact a records database.

Illinois circuit courts handle state criminal proceedings. Local circuit clerks maintain the court files. To search a criminal case, start with the county where the prosecution occurred.

1. Identify the county.

   A Chicago prosecution normally points to Cook County. Other matters may be in DuPage, Lake, Will, Kane, McHenry, Winnebago, Sangamon, Peoria, Madison, St. Clair or another Illinois county.

2. Find the official circuit clerk.

   Open the Illinois Courts Directory, choose the county and follow the appropriate court or clerk website.

3. Look for Case Search or Public Access.

   Some counties label their free online tools “Case Lookup,” “Court Records,” “Public Access” or “Docket Search.” The functions vary by county.

4. Choose the criminal case category.

   Use any available criminal, traffic or case-type filters. A civil-only search will not necessarily show criminal proceedings.

5. Enter a full name or case number.

   Where name searching is supported, use exact spellings and additional identifiers. A docket number is usually the most reliable starting point.

6. Compare all possible matches.

   Check county, case number, filing date, case type and public party details. Do not assume that a shared name is proof of identity.

7. Read the docket chronologically.

   Examine charges, hearing entries, pleas, dismissal orders, verdicts, judgments, sentencing and later activity when visible.

8. Request official documents if necessary.

   Contact the circuit clerk for certified copies, historical files or records not available online. Local fees may apply.

County differences matter. Cook County has its own official public online case information, while other counties may use local case-management providers, their own clerks’ websites or in-person terminals.

The Uniform Conviction Information Act (UCIA) allows public access to qualifying conviction-history information maintained by the Illinois State Police Bureau of Identification. This differs from a county court docket and from a person’s full Illinois criminal-history transcript.

Illinois State Police uses its Criminal History Information Response Process (CHIRP) for electronic name-based conviction information requests. The official site publishes registration, authorization and troubleshooting instructions.

The Bureau of Identification explains that public dissemination under the UCIA concerns conviction information. A court case may contain other events, including arrests, charges or dismissals, that do not appear in a standard public conviction-history response.

Illinois State Police updated part of its criminal background-check fee schedule effective October 1, 2026. UCIA name-based and fingerprint-based fees are listed separately from other state and FBI fingerprint inquiries.

Illinois provides a special Access and Review procedure that allows a person to obtain their own Illinois criminal-history transcript and challenge errors. The Illinois State Police does not charge for processing the transcript or challenge, but the location taking fingerprints may charge.

1. Find a participating fingerprint location.

   ISP explains that eligible Illinois law-enforcement or correctional facilities and licensed fingerprint vendors can initiate the personal-review request.

2. Request Access and Review explicitly.

   Explain that you want your own Illinois criminal-history transcript, not an ordinary UCIA public conviction-history search.

3. Provide required fingerprints and identity information.

   The authorized location collects identifying details and forwards them to Illinois State Police.

4. Choose the return address.

   Under the official process, results may be returned to your provided residence address or the participating facility, as applicable.

5. Examine the history or no-record statement.

   Review entries, arrest dates, charges and available dispositions for accuracy.

6. Use the Record Challenge form when necessary.

   ISP supplies a challenge procedure for incorrect or incomplete Illinois criminal-history information.

7. Gather court dispositions to support corrections.

   If the record is missing an outcome, the circuit clerk may provide the certified order or judgment needed to clarify it.

Illinois IDOC provides a public Individual in Custody Search. It can help locate information about people within the department’s records, but it does not provide a complete history of every arrest or case.

If an IDOC search returns no match, it does not mean no criminal history exists. Someone may have had a misdemeanor conviction, a completed sentence or a county jail stay without being listed as a current state prisoner.

The Illinois State Police maintains a public database for persons required to register under Illinois sex-offender registration law. Searches can include first name, last name, date of birth, city, county, ZIP code, compliance status and other available options.

1. Open the official registry.

   Use the Illinois State Police website, not a commercial registry mirror.

2. Review the public disclaimer.

   The registry has important limitations about identity, data accuracy and misuse.

3. Begin with a name.

   ISP recommends using first and last name initially, then adding other identifiers to refine the search.

4. Check geographic options when useful.

   The official registry includes city, county, ZIP and mapping features.

5. Verify any potential match.

   A registration entry does not establish every aspect of a person’s full criminal history.

A free search is only useful when it answers the correct question. Illinois agencies maintain different types of criminal justice information.

Federal criminal prosecutions are separate from Illinois state circuit courts. For federal cases, use PACER. It may involve usage fees, and public federal criminal filings can also contain restrictions.

Illinois law allows some criminal records to be expunged or sealed. These remedies differ. Generally, sealing restricts public access, while expungement may result in eligible records being removed or destroyed under the applicable law and order.

Illinois Courts publishes standardized expungement and sealing forms. Illinois Legal Aid Online also provides a free guided application that helps eligible users prepare the forms. Filing generally happens through the circuit clerk in the county where the record arose.

A criminal record search can affect housing, licensing, employment and reputation. Do not rely on names alone, and do not equate an arrest, charge or court hearing with a conviction.

Illinois law, including applicable employment background-check restrictions, may impose additional requirements beyond federal rules. Consult the proper agency or qualified counsel before making a regulated eligibility decision.

• Illinois Courts Directory — county courthouses, circuits and court contacts
• Cook County Online Case Information — local public electronic dockets
• ISP Criminal History — UCIA rules and scope
• ISP Name-Based Checks — CHIRP services and procedures
• ISP Criminal History Fee Schedule — October 2026 applicable fees
• ISP Access and Review — personal record requests and correction
• Illinois Administrative Rules Part 1210 — transcript, fees and challenge rules
• Illinois IDOC Offender Search — state custody search
• Illinois Sex Offender Registry — public registrant search
• Illinois Courts Expungement and Sealing Forms — court-approved legal forms
• Illinois Legal Aid Free Expungement Form — guided form assistance
• PACER — federal criminal cases