Are OTF Knives Legal in Illinois?

Illinois Knife Laws Overview

Illinois is one of the more restrictive states when it comes to knife legislation — particularly for automatic knives. Understanding the OTF knife situation here requires careful attention to both state law and local ordinances, which are among the strictest in the Midwest.

The foundation of Illinois knife regulation rests on the state's interpretation of switchblade statutes, originally enacted in the mid-20th century during a period of heightened concern about youth gang violence in urban areas. These laws have been amended multiple times but remain fundamentally restrictive in their classification of automatic knife mechanisms.

The Switchblade Knife Act

Illinois has historically banned switchblade knives under 720 ILCS 5/24-1. The statute makes it a Class A misdemeanor to sell, manufacture, purchase, possess, or carry any knife with a blade that opens automatically by hand pressure applied to a button, spring, or other device in the handle.

OTF knives — which deploy the blade forward out of the handle via a button mechanism — fall squarely within this definition. OTF knives are generally illegal in Illinois under the Switchblade Knife Act.

The statute is notably broad: it doesn't just prohibit carrying — it prohibits possession, sale, manufacture, and purchase. Simply owning an OTF knife in Illinois could theoretically result in criminal charges, even if you never carry it outside your home.

A Class A misdemeanor in Illinois is punishable by up to one year in jail and fines up to $2,500.

Exception: Folding Knives with Thumb Studs or Flippers

Importantly, Illinois law does NOT prohibit:

• Standard folding pocket knives (non-automatic)
• Manually-assisted openers (Kershaw Speedsafe, etc.) that require manual input to start opening
• Fixed-blade knives carried openly in a sheath
• Hunting and utility knives used for legitimate purposes

The distinction between an illegal automatic and a legal assisted opener hinges on whether the blade begins moving before the user applies manual force.

Chicago's Additional Restrictions

Chicago has its own knife ordinances that are even more restrictive than state law. Chicago Municipal Code § 8-24-020 bans carrying knives with blades longer than 2.5 inches in many circumstances. This means even legal folding knives can run into trouble in the city.

Chicago's ordinances also restrict knife carry within certain designated areas, including public transit, parks, and government buildings. The combination of state and city restrictions makes Illinois — and particularly Cook County — one of the most challenging jurisdictions for knife owners.

Exceptions Within State Law

Illinois law carves out limited exceptions for automatic knives:

• Military personnel on duty with proper authorization
• Law enforcement officers
• Medical and rescue personnel in certain situations
• Commercial fishing operations (specific blade types)

Recent Developments

There have been periodic efforts in the Illinois legislature to modernize knife laws. Several bills have been introduced that would legalize switchblades and OTF knives with fewer restrictions. While some have passed committee stages, none have been signed into law as of 2025. Illinois remains one of the most restrictive states for automatic knife ownership.

What This Means for Illinois Residents

If you live in Illinois and are interested in OTF knives, your legal options are limited. Possessing or carrying an OTF knife in the state could result in criminal charges. Some residents who collect OTF knives store them at addresses in other states or only purchase models that qualify as legal assisted openers.

For those who want the fastest possible blade deployment while remaining legal, high-quality assisted-opening knives are the best option. Modern assisted openers can deploy in under a second — nearly as fast as an automatic.