1. Legal Knife Types
Most knives are legal to own and carry in Illinois, including:
- Pocket knives
- Bowie knives
- Fixed-blade knives
- Butterfly knives (also known as balisongs)
However, the following are prohibited under 720 ILCS 5/24-1:
- Ballistic knives
- Throwing stars
- Knives with knuckle handles (knuckle knives)
- Any weapon carried with the intent to use it unlawfully
2. Automatic Knives (Switchblades & OTF)
Since August 2017, Illinois allows individuals to possess and carry automatic knives (e.g. switchblades or out-the-front knives), but only if:
- The person is 21 years or older
- Has a valid FOID card (Firearm Owner’s Identification)
Important: Some cities and counties have stricter laws. For example, Chicago bans all automatic knives, regardless of FOID status.
3. Blade Length Restrictions
Illinois does not have a state-wide blade length limit, except in certain places. However:
- In government buildings or schools, blades longer than 3 inches are not allowed
- In Chicago, knives with blades longer than 2.5 inches are banned in public spaces
4. Intent Matters
Illinois law focuses on the purpose of carrying a knife. Carrying a knife for lawful purposes like fishing, camping, or work is typically allowed. But if you’re carrying a knife in a way that appears threatening or unlawful, it could be considered a crime.
5. Where You Cannot Carry a Knife
Regardless of knife type or blade size, it’s illegal to carry knives in:
- Schools
- Government buildings
- Bars or establishments that serve alcohol
- Places requiring paid admission (like concerts or festivals)
6. Consequences of Violating Knife Laws
Carrying an illegal knife or violating local knife laws can result in:
- A Class A misdemeanor (up to 1 year in jail and/or $2,500 fine)
- Felony charges if the knife is used in connection with a crime or taken into restricted areas like schools
In 2025, most knives are legal in Illinois with some restrictions based on blade length, knife type, age, FOID status, and location. Always check local city ordinances, especially in Chicago, which enforces some of the strictest knife laws in the state.
FAQ: Illinois Knife Laws
Is it legal to carry a pocket knife in Illinois?
Yes, carrying a pocket knife is legal in Illinois. Just be sure it’s not over 3 inches if you’re in a government building or 2.5 inches in Chicago.
Can you carry a switchblade in Illinois?
Yes, but only if you’re 21 or older and have a valid FOID card. Also, check city laws, as some places still ban them.
What knives are completely banned in Illinois?
Ballistic knives, throwing stars, knuckle knives, and finger-ring knives are banned statewide or by city laws like in Chicago.
Are butterfly knives legal in Illinois?
Yes, butterfly knives are legal, though some places may restrict them. Avoid carrying them in government buildings or schools.
Do I need a FOID card to carry a knife?
Not for most knives, but for automatic knives like switchblades, you do need a FOID card if you’re over 21.
Can I carry a knife for self-defence?
Yes, but only if it’s for peaceful and lawful reasons. If police believe you intend to use it for harm, you could face charges.
What is the maximum blade length allowed in Chicago?
In Chicago, knives must have a blade no longer than 2.5 inches. This applies to both residents and visitors.