Are Switchblades Illegal in Illinois? FOID Card and Carry Rules

Switchblades are legal in Illinois only if you hold a currently valid Firearm Owner’s Identification (FOID) card issued by the Illinois State Police. Without one, possessing, buying, selling, or carrying a switchblade is a criminal offense under the state’s Unlawful Use of Weapons statute. So the short answer to whether switchblades are illegal in Illinois is: they’re prohibited by default, and the FOID card is the exemption that makes ownership lawful.¹

One knife type gets no exemption at all. Ballistic knives, which propel a blade from the handle using a spring or compressed gas, remain illegal for everyone in Illinois, FOID card or not.¹

What Illinois Treats as a Switchblade

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

Assisted-Opening Knives Are Different

This distinction trips people up constantly. An automatic knife has a blade under spring tension at all times; pressing a button releases it instantly. An assisted-opening knife requires you to manually start the blade moving with a thumb stud or flipper tab, and an internal spring then finishes the motion. The mechanical difference is what the law calls “bias toward closure”: an assisted-opening knife’s spring holds the blade shut until you physically begin opening it.

Federal law explicitly exempts knives with a bias toward closure from the definition of a switchblade.² If your knife requires 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 entirely, look for assisted-opening models and confirm the manufacturer describes the mechanism as having a bias toward closure.

Getting the FOID Card That Makes It Legal

The FOID card is a state-issued license that allows Illinois residents to possess firearms and ammunition. It’s also the key that unlocks legal switchblade ownership. You apply through the Illinois State Police, and the application costs $10. You’ll need a valid Illinois driver’s license or state ID and a head-and-shoulders photograph taken within the last 30 days.³

FOID eligibility generally starts at 21, though applicants under 21 can obtain a card with written parental or guardian consent. The application triggers a background check, and the disqualifiers mirror what would prevent you from legally owning a firearm: felony convictions, recent mental health commitments, controlled substance addiction within the past year, active orders of protection, and domestic battery convictions, among others.³

Processing times vary and delays are common. Don’t buy a switchblade before your card arrives. The statutory exemption requires you to actually possess a currently valid FOID card, not just to have applied for one.

The exemption also covers businesses engaged in selling or manufacturing switchblade knives, so licensed dealers can lawfully stock and sell them.¹

Places You Still Can’t Carry One

A FOID card is not a universal pass. Illinois law designates several categories of locations where carrying a switchblade is elevated to a Class 4 felony, and those restrictions apply to everyone, FOID card or not. 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 a felony punishable by one to three years in state prison and a fine of up to $25,000.¹ A switchblade clipped inside your pocket at a county courthouse or on a school campus is a felony, period.

Federal Property

Federal buildings have their own rules that layer on top of Illinois law. Under federal law, a “dangerous weapon” is prohibited 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 with a blade at or above that length, including any switchblade, could qualify.⁴ Federal courthouses, Social Security offices, VA hospitals, and post offices all fall under this rule. Your Illinois FOID card is irrelevant on federal property.

Local Ordinances

Illinois has enacted knife law preemption, which prevents cities and counties from passing knife ordinances more restrictive than state law. If you’re legal under the state statute, a local municipality generally cannot make your switchblade illegal through its own ordinance. Federal property within any city still follows its own rules regardless of state or local law.

What a Violation Costs

Penalties fall into two tiers depending on the nature of the violation.

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 Beyond the criminal penalty, a misdemeanor weapon conviction can affect your future FOID card eligibility and your employment prospects.

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 feels like an innocent oversight, such as forgetting a knife in your bag before entering a courthouse, can produce life-altering consequences.

Keeping Your FOID Card Current

The switchblade 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. At that point you’re in the same position as someone who never had a card at all.

FOID cards need periodic renewal, and Illinois State Police processing delays can stretch for months. Start your renewal well before the expiration date to avoid a gap. The statute’s language doesn’t explicitly create a grace period for switchblade possession the way it does for some firearm-related situations, so keep proof that you’ve submitted your renewal application.

Traveling and Shipping

Air Travel

The TSA prohibits all knives in carry-on bags. Switchblades can go in checked luggage, but must be sheathed or securely wrapped to prevent injury to baggage handlers.⁶ The TSA officer at the checkpoint has final authority on whether any item is permitted. Even if your knife is legal in your checked bag, your destination state may have completely different knife laws. A switchblade that’s legal in Illinois with a FOID card may be flatly prohibited where you land.

Shipping

The Federal Switchblade Act restricts interstate commerce in automatic knives but includes several exceptions. Common carriers can ship switchblades in the ordinary course of business, and the Armed Forces are fully exempt.² Mailing a switchblade through the U.S. Postal Service is far more restricted. USPS rules limit switchblade mailings almost exclusively to government procurement officials and authorized dealers fulfilling government orders.⁷ Private carriers such as FedEx and UPS have their own policies, which are generally more permissive but change periodically. If you buy a switchblade online for delivery to Illinois, the seller will typically use a private carrier for this reason.

1
Illinois General Assembly. 720 ILCS 5/24-1 Unlawful Possession of Weapons
2
Office of the Law Revision Counsel. 15 U.S. Code 1244 – Exceptions
3
Illinois State Police. Firearm Owner’s Identification (FOID) Card
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
6
Transportation Security Administration. Knives
7
Postal Explorer. Publication 52 – Hazardous, Restricted, and Perishable Mail