Knife Laws in the USA: What's Legal to Carry?

Knife laws in the United States are set at the state and local level, which means the rules can change from one city or state line to the next. This guide explains how to think about knife laws and what to check before you buy or carry, so you can stay on the right side of the law.

This article is general information, not legal advice. Always confirm current laws with official sources for your area.

How knife laws work in the US

There's no single federal knife-carry law for everyday knives. Instead, each state, and often individual cities, sets its own rules covering what you can own, what you can carry, and how. That's why a knife that's perfectly legal in one state may be restricted in another.

Common things the law regulates

• Blade length: Some areas limit the length you can carry, especially concealed.
• Knife type: Automatic, OTF, and certain other knives are regulated in some states. See our automatic and OTF knives guide.
• Concealed vs open carry: Many places treat a sheathed, openly carried knife differently from a concealed one.
• Location restrictions: Schools, government buildings, and airports have their own rules regardless of state law.

How to stay compliant

Check your state and city knife laws from official sources, and re-check before you travel. When in doubt, a modest-length, non-automatic folder carried openly is the most broadly accepted option. For everyday options, see our EDC pocket knives guide.

Buy with confidence

Understanding the basics lets you choose a knife you can actually carry where you live. Browse our folding knives and fixed blade knives once you know your local rules.

Frequently asked questions

Are pocket knives legal to carry in the US?
In most places, yes, ordinary pocket knives are legal to own and carry, but rules vary by state and city. Common restrictions involve blade length, concealed carry, and specific knife types like automatics. Always check your local laws.

What is the legal blade length to carry?
There is no single national limit; legal blade length is set by state and local law and varies widely. Some areas restrict carry of blades over a certain length, often around 3 to 4 inches in stricter jurisdictions. Check the rules where you live and travel.

Are automatic and OTF knives legal?
It depends on the state. Many states have legalized automatic and OTF knives in recent years, but some still restrict or prohibit them. Verify the current law in your state and any place you carry before buying one.

Does knife law change when I travel between states?
Yes. Knife laws are set at the state and local level, so what's legal at home may be restricted elsewhere. Before traveling with a knife, check the laws of your destination and anywhere you pass through.