Filing a false police report in Illinois is a Class 4 felony in the typical case, punishable by one to three years in prison, up to 30 months of probation, and the collateral damage that follows any felony conviction. The offense sits inside the state’s disorderly conduct statute at 720 ILCS 5/26-1, which treats knowingly reporting a fake crime to a peace officer as felony conduct rather than a misdemeanor. Bomb and chemical threats climb one class higher, and false 911 calls come with a mandatory bill for the emergency response.
How the Penalties Break Down
Illinois doesn’t have a single “false report” law. Several subsections of 720 ILCS 5/26-1 cover different kinds of false reports, and the classification of your offense depends on who received the report and what it claimed.1Illinois General Assembly. Illinois Compiled Statutes 720 ILCS 5/26-1 – Disorderly Conduct
Class 4 Felony: False Reports to Police and False 911 Calls
Walking into a police station and reporting a crime you know didn’t happen falls under subsection (a)(4). Dialing 911 with a fabricated emergency falls under subsection (a)(6). Both are Class 4 felonies.1Illinois General Assembly. Illinois Compiled Statutes 720 ILCS 5/26-1 – Disorderly Conduct The sentencing range is one to three years in prison, with an extended term of three to six years available in aggravating circumstances, or up to 30 months of probation as an alternative.2Illinois General Assembly. Illinois Compiled Statutes 730 ILCS 5/5-4.5-45 – Class 4 Felony
Class A Misdemeanor: False Reports to a Public Safety Agency
A false report to a public safety agency under subsection (a)(5) is treated more leniently on a first offense, charged as a Class A misdemeanor with a maximum of 364 days in county jail and a fine up to $2,500.3Illinois General Assembly. Illinois Compiled Statutes 730 ILCS 5/5-4.5-55 – Class A Misdemeanor A second or later violation is bumped to a Class 4 felony.1Illinois General Assembly. Illinois Compiled Statutes 720 ILCS 5/26-1 – Disorderly Conduct
Class 3 Felony: Bomb and Chemical Threats
Falsely reporting a bomb, explosive, poison gas, biological contaminant, or radioactive substance is a Class 3 felony, punishable by two to five years in prison, or five to ten years on an extended term.4Illinois General Assembly. Illinois Compiled Statutes 730 ILCS 5/5-4.5-40 – Class 3 Felony The statute also imposes a mandatory fine of $3,000 to $10,000 on top of any other penalty, which is unique among the false-report subsections.1Illinois General Assembly. Illinois Compiled Statutes 720 ILCS 5/26-1 – Disorderly Conduct
The “Knowingly” Requirement
Every false-report offense in the statute turns on a single word: knowingly. The prosecution has to prove that at the moment you made the report, you knew there was no reasonable basis for it.1Illinois General Assembly. Illinois Compiled Statutes 720 ILCS 5/26-1 – Disorderly Conduct Being wrong is not the same as lying.
Someone who reports a stolen car and later finds out a family member borrowed it hasn’t committed a crime. Someone who misidentifies a suspect, misreads a situation, or repeats secondhand information they believed to be true hasn’t either. The statute is aimed at people who invent crimes or fabricate details, not at people who turn out to be mistaken. For false 911 calls specifically, the state also has to prove the caller knew the call could trigger an emergency response.
This is where most false-report cases are won or lost. If the only evidence that a report was knowingly false is that the report turned out to be inaccurate, that alone is usually not enough to convict. The state has to distinguish an honest mistake from a deliberate fabrication, and circumstantial evidence often struggles to bridge that gap. A report that gets peripheral details wrong but describes a real incident isn’t a false report within the meaning of the statute; the falsehood has to go to whether an offense actually occurred.
The Bill for a False 911 Call
False 911 calls carry a cost that people rarely see coming. On conviction under subsection (a)(6), the court is required to order the defendant to reimburse the public agency for the reasonable costs of the emergency response, up to $10,000. The only exception is a court finding of indigence.1Illinois General Assembly. Illinois Compiled Statutes 720 ILCS 5/26-1 – Disorderly Conduct Depending on how many units responded and how long they were tied up, that number can add up quickly, and it sits on top of any fine, court costs, and sentence the judge imposes.
A Related Charge: Obstructing Justice
Prosecutors sometimes reach for a different statute, 720 ILCS 5/31-4, which makes it a Class 4 felony to furnish false information with the intent to prevent someone’s arrest or to obstruct a prosecution or defense.5Illinois General Assembly. Illinois Compiled Statutes 720 ILCS 5/31-4 – Obstructing Justice Lying to police to cover for someone else fits obstruction more naturally than the disorderly conduct statute, and prosecutors occasionally charge both.
Getting Sued by the Person You Accused
The criminal case isn’t the only exposure. A person wrongly named in a false police report can sue for malicious prosecution and recover legal fees, lost wages, emotional distress, and reputational damages. The Illinois statute of limitations is two years from the date the underlying criminal case ends.6Illinois General Assembly. Illinois Compiled Statutes 735 ILCS 5/13-202
The plaintiff generally has to show that the original prosecution was initiated without probable cause, was motivated by an improper purpose, and ended in their favor. When a fabricated report is what put the case in motion, those elements are easier to prove, and juries tend to take the underlying dishonesty seriously. Damages can be significant, especially when the false accusation led to an arrest, a job loss, or public embarrassment.
What a Conviction Does to Your Record
Because the common versions of this offense are felonies, a conviction shows up on background checks and can shape employment, housing, and licensing outcomes for years. Employers in healthcare, education, law enforcement, and finance are especially wary of convictions involving deliberate deception, and professional licensing boards routinely deny or revoke licenses over dishonesty-related felonies.
Expungement is generally not available for felony convictions in Illinois unless the conviction has been reversed, vacated, or pardoned by the Governor with a Certificate of Eligibility from the Prisoner Review Board. Sealing is a different question. Most felony convictions can be sealed three years after the end of the sentence, and false-report convictions are not on the excluded list. A sealed record still exists but is hidden from most public background checks. A later felony conviction can block future sealing and even unseal what was previously sealed, and a court can deny a petition if restitution is still outstanding.