Is Butterfly Knife Legal in Illinois? (2026)

Key facts

Status

Restricted

Permit required

No

Jurisdiction

Illinois

Last reviewed

2026-02-15

Butterfly Knife laws in Illinois

In Illinois, butterfly knives, also known as balisongs, fall under regulations concerning potentially dangerous weapons. While there isn't a specific statute solely dedicated to butterfly knives, their possession and transfer are governed by broader knife laws. The Illinois Criminal Code, specifically 720 ILCS 5/24-1, addresses unlawful use of weapons, which can include certain types of knives depending on their design, length, and how they are carried or possessed. Generally, knives that are designed to open automatically or by spring, and that conceal a blade within their handle, can be subject to these restrictions. Violations of Illinois weapons laws, including those pertaining to butterfly knives if deemed unlawful, can result in significant penalties. Depending on the specific circumstances of the violation, such as intent or prior offenses, penalties can range from Class A misdemeanors to Class 3 felonies. A Class A misdemeanor can lead to a fine of up to $2,500 and/or up to one year in jail. A Class 3 felony can result in a prison term of two to five years and fines up to $25,000. It is crucial to note that legal interpretations and enforcement can vary, and local ordinances may impose additional restrictions. While Illinois law generally permits the open carry of knives, the concealed carry of certain knives, including butterfly knives, is often more restricted. Illinois is a shall-issue state for concealed carry permits under the Firearm Concealed Carry Act (430 ILCS 66/), but this act specifically excludes certain types of weapons from lawful concealed carry. Travelers should also be aware that the Transportation Security Administration (TSA) prohibits butterfly knives in carry-on luggage during air travel. Residents and visitors alike are strongly advised to research both state statutes and any applicable municipal ordinances within their specific locality, as local rules can be more stringent than state law.

Frequently asked questions

Is butterfly knife legal in Illinois for travelers?

For travelers visiting Illinois, butterfly knife is currently restricted. In Illinois, butterfly knives, also known as balisongs, fall under regulations concerning potentially dangerous weapons. While there isn't a specific statute solely dedicated to butterfly knives, their possession and transfer are governed by broader knife laws. The Illinois Criminal Code, specifically 720 ILCS 5/24-1, addresses unlawful use of weapons, which can include certain types of knives depending on their design, length, and how they are carried or possessed. Generally, knives that are designed to open automatically or by spring, and that conceal a blade within their handle, can be subject to these restrictions. Violations of Illinois weapons laws, including those pertaining to butterfly knives if deemed unlawful, can result in significant penalties. Depending on the specific circumstances of the violation, such as intent or prior offenses, penalties can range from Class A misdemeanors to Class 3 felonies. A Class A misdemeanor can lead to a fine of up to $2,500 and/or up to one year in jail. A Class 3 felony can result in a prison term of two to five years and fines up to $25,000. It is crucial to note that legal interpretations and enforcement can vary, and local ordinances may impose additional restrictions. While Illinois law generally permits the open carry of knives, the concealed carry of certain knives, including butterfly knives, is often more restricted. Illinois is a shall-issue state for concealed carry permits under the Firearm Concealed Carry Act (430 ILCS 66/), but this act specifically excludes certain types of weapons from lawful concealed carry. Travelers should also be aware that the Transportation Security Administration (TSA) prohibits butterfly knives in carry-on luggage during air travel. Residents and visitors alike are strongly advised to research both state statutes and any applicable municipal ordinances within their specific locality, as local rules can be more stringent than state law.

Do I need a permit for butterfly knife in Illinois?

Illinois does not specifically require a permit for butterfly knife, though general regulations apply.

Can I transport butterfly knife through Illinois?

Transport laws for butterfly knife in Illinois depend on the specific item and your route. Generally, transport is allowed if you comply with state regulations. Always check states you pass through.

What are the penalties for butterfly knife violations in Illinois?

Penalties for butterfly knife violations in Illinois vary based on the specific offense. Always verify current laws before traveling.