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Criminal Law in Illinois

This page covers criminal law as it applies in Illinois — the state and federal laws that govern it, filing deadlines, where to get help, and notable in-state decisions. For what criminal protects generally, see the national overview.

Compiled from primary legal sourcesNot legal adviceHow we source this

Quick answer

Illinois criminal law covers offenses ranging from minor misdemeanors to serious felonies, with cases moving through investigation, arrest, arraignment, pretrial proceedings, trial, and sentencing. Anyone arrested has the right to remain silent and the right to an attorney — including a court-appointed public defender if they cannot afford one. Decisions made early in a case can have lasting consequences, so consulting a lawyer before answering police questions is important. Deadlines to appeal a conviction can be as short as 30 days, so acting quickly matters.

Laws that govern criminal in Illinois

Illinois state law

  • Criminal Code of 2012720 ILCS 5/

    Defines all criminal offenses in Illinois — from homicide and sexual assault to theft and drug offenses — including the elements of each crime, offense classifications, and affirmative defenses.

  • Code of Criminal Procedure of 1963725 ILCS 5/

    Governs the entire Illinois criminal court process, including arrest, pretrial release and detention, grand jury proceedings, arraignment, discovery, speedy trial rights, appeal, and post-conviction remedies.

  • Unified Code of Corrections730 ILCS 5/

    Sets sentencing ranges for each felony and misdemeanor class and governs probation, parole, mandatory supervised release, and the Illinois Department of Corrections.

Browse all of Illinois’s statutes →

Illinois-specific deadlines for criminal cases

Enter the date your problem happened to see which deadlines may already have passed. Not every deadline applies to every situation — this is a general estimate, not legal advice. Deadlines can be shorter, paused, or extended.

  • Prosecution time limit — general felony: 3 years

    For felonies not subject to an unlimited or extended limitation period, the state must begin prosecution within three years of the offense. Section 3-6 of the same act lists specific felonies with longer extended periods.

    720 ILCS 5/3-5(b)

  • Prosecution time limit — misdemeanor: 18 months

    For misdemeanors, the state must begin prosecution within one year and six months (18 months) of the commission of the offense.

    720 ILCS 5/3-5(b)

  • Speedy trial right — defendant held in custody: 120 days

    A defendant held in custody must be brought to trial within 120 days. If trial does not begin in time — and the delay was not caused by the defendant — the case must be dismissed.

    725 ILCS 5/103-5(a)

  • Speedy trial right — defendant on pretrial release (after written demand): 160 days

    A defendant released pending trial who files a written demand for trial gives the court 160 days to bring the case to trial. The demand must be made in writing to start this clock.

    725 ILCS 5/103-5(b)

  • Notice of direct appeal after conviction: 30 days

    A written notice of appeal must be filed with the circuit court clerk within 30 days after the sentencing order is entered. Missing this deadline generally forfeits the right to a direct appeal.

    Illinois Supreme Court Rule 606(b)

  • Post-conviction petition: 3 years

    A post-conviction petition raising constitutional claims must generally be filed within three years of conviction, or within six months after U.S. Supreme Court proceedings conclude if certiorari was sought. Claims of actual innocence are not subject to this deadline.

    725 ILCS 5/122-1

These deadlines are general estimates. They can be shorter than they appear, and can be paused (“tolled”) or extended in specific situations. This is not legal advice. If any deadline is near or has passed, talk to a lawyer right away.

Where to go & how to get help

Government agencies and non-profit legal-help organizations for criminal in Illinois.

How to take action in Illinois

  1. 1

    Invoke your right to remain silent

    Clearly stating that you want to remain silent and want a lawyer stops police questioning under the Fifth and Sixth Amendments to the U.S. Constitution. You are not required to answer questions beyond basic identification.

  2. 2

    Request a lawyer or public defender at your first hearing

    Anyone who cannot afford a private attorney is entitled to a court-appointed public defender in Illinois. Make this request at the arraignment — the first formal hearing where charges are read — or as early as possible.

  3. 3

    Attend every scheduled court date

    Missing a court date in Illinois can result in an arrest warrant and additional charges. Cases proceed through multiple hearings, from arraignment through pretrial motions, trial, and sentencing.

  4. 4

    Review the prosecution's evidence with your attorney

    Through the discovery process, your attorney can obtain police reports, witness statements, lab results, and other evidence the prosecution plans to use, which is essential for evaluating the case and possible defenses.

  5. 5

    Consider all options before trial

    Many Illinois criminal cases are resolved through plea agreements that may reduce charges or sentencing exposure. Whether to accept a plea or go to trial is a decision that belongs to the defendant, informed by their attorney.

  6. 6

    Meet all post-conviction deadlines if you want to appeal

    A notice of appeal must be filed within 30 days of sentencing, and a post-conviction petition has a separate deadline. Missing either can permanently bar further court review.

A general roadmap, not legal advice — the right steps depend on your situation and deadlines.

Common questions about criminal in Illinois

What is the difference between a felony and a misdemeanor in Illinois?

Felonies are the more serious category and carry possible sentences of more than one year in the Illinois Department of Corrections. Illinois classifies felonies as Class X (most serious), Class 1, Class 2, Class 3, or Class 4. Misdemeanors carry up to one year in county jail and are classified as Class A, Class B, or Class C. Petty offenses and business offenses are the least serious category and typically result only in fines.

Does Illinois still require cash bail?

No. Illinois abolished monetary cash bail on September 18, 2023, under the Pretrial Fairness Act — part of the Safety, Accountability, Fairness and Equity-Today Act (commonly called the SAFE-T Act). A judge now decides pretrial release or detention based on whether a person poses a real and present threat to safety or a flight risk, not on the ability to pay. Defendants who are ordered detained must be brought to trial within 90 days of the detention order.

What rights do I have if police want to search my home or car?

The Fourth Amendment to the U.S. Constitution protects against unreasonable searches and seizures. Police generally need a valid warrant signed by a judge, your voluntary consent, or a recognized legal exception — such as an emergency — to search your property. Evidence obtained through an unlawful search may be suppressed, meaning the court excludes it from trial, through a pretrial motion filed by your attorney.

Who qualifies for a public defender in Illinois?

Under the Sixth Amendment to the U.S. Constitution, anyone charged with a crime who cannot afford a private lawyer has the right to a court-appointed attorney. In Illinois, the judge evaluates your income, the number of people you support, and your assets before appointing a public defender. The request is typically made at or before the arraignment, often by completing an Affidavit of Assets and Liabilities for the court.

What happens at an arraignment?

An arraignment is the first formal court hearing after criminal charges are filed. The judge reads the charges aloud, the defendant enters an initial plea, and the court addresses pretrial release or detention conditions. For felonies in Illinois, an arraignment typically follows either a grand jury indictment or a preliminary hearing where a judge finds probable cause.

How long does the government have to bring criminal charges?

For most felonies, Illinois requires the prosecution to begin within three years of the offense. For most misdemeanors, the limit is 18 months. There is no time limit for murder, manslaughter, criminal sexual assault, and certain other serious offenses — those can be charged at any time. The exact period depends on the specific charge under the Illinois Criminal Code of 2012 (720 Illinois Compiled Statutes 5/).

What happens if I am convicted and want to appeal?

A defendant has the right to appeal a conviction to the Illinois Appellate Court. A notice of appeal must be filed within 30 days of the sentencing order. Defendants who cannot afford a private appellate attorney may qualify for free representation through the Office of the State Appellate Defender. A separate post-conviction petition can raise constitutional claims not fully addressed on direct appeal and must generally be filed within three years of conviction.

Not legal advice. State-specific statutes, deadlines and procedures are being sourced and will appear here.