Are Switchblades Illegal in Illinois? FOID Card and Penalties

Are switchblades illegal in Illinois? Not entirely. You can legally possess, buy, sell, or carry a switchblade in Illinois if you hold a currently valid Firearm Owner’s Identification (FOID) card issued by the Illinois State Police. Without that card, every one of those acts is a criminal offense under the state’s Unlawful Use of Weapons statute. And even with the card, there are places where carrying one becomes a felony.

The FOID Card Is What Makes a Switchblade Legal

Illinois law starts from a prohibition. The Unlawful Use of Weapons statute makes it illegal to possess, buy, sell, or carry a switchblade knife. The legislature then carved out an exemption: the prohibition does not apply to anyone who holds a currently valid FOID card.¹ The same exemption covers businesses that manufacture or sell switchblades, which is why licensed dealers can legally stock them.

FOID eligibility generally begins at 21. Applicants under 21 can obtain a card with written parental or guardian consent.² The switchblade statute itself doesn’t set a separate age floor beyond what the FOID card already requires.

One knife has no exemption at all. Ballistic knives, which propel a blade out of the handle using a spring or compressed gas, remain illegal for everyone in Illinois. A FOID card doesn’t help.¹

What Illinois Treats as a Switchblade

The statute defines a switchblade as any knife with a blade that opens automatically by hand pressure applied to a button, spring, or other device in the handle.¹ That definition is broad. It covers traditional side-opening automatics and out-the-front (OTF) knives, where the blade extends straight out of the handle. If the blade deploys automatically when you press something, Illinois treats it as a switchblade.

Assisted-Opening Knives Are Different

This distinction matters, and people get it wrong constantly. An automatic knife holds the blade under spring tension at all times; pressing a button releases it. An assisted-opening knife requires you to physically start the blade moving with a thumb stud or flipper tab, and an internal spring finishes the motion. The mechanical test is what the law calls “bias toward closure.” An assisted-opening knife’s spring keeps the blade shut until you begin to open it. An automatic knife’s spring is always pushing the blade open.

Federal law explicitly exempts knives with a bias toward closure from the switchblade definition.³ Illinois follows the same logic. If your knife needs manual force to start the opening action, it isn’t a switchblade under the law, and you don’t need a FOID card to carry one. If you want to avoid the FOID requirement, buy an assisted-opening model and confirm the manufacturer describes it as having a bias toward closure.

Getting a FOID Card

The FOID card is a state-issued license that authorizes Illinois residents to possess firearms and ammunition. It’s also the key to legal switchblade ownership. You apply through the Illinois State Police for a $10 fee, and you’ll need a valid Illinois driver’s license or state ID plus a head-and-shoulders photo taken within the last 30 days.²

The application runs a background check. You won’t qualify if you:

Have been convicted of a felony in any jurisdiction
Have been a patient in a mental health facility within the past five years
Have used or been addicted to a controlled substance within the past year
Are subject to an active order of protection or no-contact order
Have been convicted of domestic battery or a similar offense

Those disqualifiers mirror the ones that would prevent you from legally owning a firearm.² Processing times vary, and delays are common. Don’t buy a switchblade before your card arrives. The exemption requires you to actually possess a currently valid FOID card, not to have one pending.

Where You Still Can’t Carry

A FOID card is not a universal pass. Illinois designates several categories of locations where carrying a switchblade of any size is a Class 4 felony. These restrictions apply to everyone, FOID card or not.

The prohibited locations include:

Government buildings and buildings funded with public money, including courthouses and schools
Public transportation facilities
Public parks
Bars and restaurants where more than 50% of revenue comes from alcohol sales

Carrying a switchblade into any of these places is punishable by one to three years in state prison and a fine of up to $25,000.¹ That’s a large step up from the misdemeanor you’d face for simply not having a FOID card. A switchblade clipped inside your pocket at a county courthouse or a school campus is a felony.

Federal buildings add another layer. Federal law prohibits “dangerous weapons” inside any building owned or leased by the federal government where federal employees work. The statute excludes pocket knives with blades under two and a half inches, but anything longer, including any switchblade, can qualify.⁴ Your Illinois FOID card is irrelevant on federal property.

Penalties

Possession Without a FOID Card

Possessing a switchblade without a valid FOID card is a Class A misdemeanor. A conviction carries up to 364 days in county jail and a fine of up to $2,500.¹⁵ A misdemeanor weapon conviction can also affect future FOID card eligibility and employment.

Carrying in a Prohibited Location

Carrying a switchblade in one of the restricted locations is a Class 4 felony, even with a valid FOID card. The sentence range is one to three years in state prison, with an extended term of three to six years in aggravating circumstances, plus a fine of up to $25,000. A felony conviction will revoke your FOID card and permanently disqualify you from obtaining one in the future. What can feel like an innocent oversight, such as forgetting a knife in your bag before entering a courthouse, becomes life-altering.

Keep the Card Current

The exemption specifically requires a “currently valid” FOID card.¹ If your card expires and you haven’t renewed it, your legal authority to possess a switchblade expires with it. You end up in the same position as someone who never had a card. FOID cards require periodic renewal, and Illinois State Police processing delays can stretch for months, so start your renewal well before the expiration date. The statute’s language doesn’t create an explicit grace period for switchblade possession while a renewal is pending.

1
Illinois General Assembly. 720 ILCS 5/24-1 Unlawful Possession of Weapons
2
Illinois State Police. Firearm Owner’s Identification (FOID) Card
3
Office of the Law Revision Counsel. 15 U.S. Code 1244 – Exceptions
4
Office of the Law Revision Counsel. 18 U.S. Code 930 – Possession of Firearms and Dangerous Weapons in Federal Facilities
5
Illinois General Assembly. 730 ILCS 5/5-4.5-55 Class A Misdemeanors