Complete guide to knife carry laws for self-defense. Blade length limits, switchblade restrictions, and concealed carry regulations in all 50 states.
Standard folding knives with blades under 3-4 inches are legal to carry in most states. Blade length limits vary. Manual open (non-automatic) is preferred.
Federal law restricts interstate sale of switchblades. State laws vary widely. Legal in ~40 states with varying restrictions. Banned or restricted in CA, NY, NJ, MA, HI, DE, CT, and D.C.
Open carry of fixed-blade knives is legal in most states. Concealed carry is restricted in many. Blade length limits typically 4-5 inches.
Banned in many states including CA, NY, MA, NJ. Gravity knives are illegal to possess in New York (though recent legal challenges are ongoing). Check local laws carefully.
Banned or restricted in CA, HI, NY, MA, NJ, IL, DE, and others. Legal with no restrictions in ~30 states.
Banned or restricted in many states including CA, NY, MA, NJ, CT, MD, and others. Considered "dangerous weapons" in most jurisdictions.
Common blade length limit: 3 inches (in states with restrictions). Some states allow up to 4-5 inches for open carry.
Key consideration for self-defense: Using a knife for self-defense is legally very different from using pepper spray. Knife laws focus on carry and brandishing. Even in permissive states, displaying a knife in a confrontation can escalate rather than de-escalate.
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