The question “What knife is banned in the US?” is asked by collectors, travelers, and everyday citizens. Knife laws in the United States vary by state and federal jurisdiction, making them complex. Some knives are outright banned under federal law, while others are restricted only in certain states.

Understanding these laws is critical to avoid criminal charges or fines. What may be legal in one state could be banned in another. This creates confusion for people who move, travel, or collect knives.

In this guide, we will explore the 10 main types of knives banned in the US, explaining why they are prohibited, where they are restricted, and what exceptions exist. We’ll also outline pros and cons of each knife for better clarity.

What Knife Is Banned In The US? Find 10 Best

1. Switchblades – Automatic Opening Knives

Switchblades are among the most commonly banned knives in the US. These knives feature a spring-loaded blade that opens at the press of a button. Federal law restricts their interstate commerce and transport.

While some states have legalized switchblades, others strictly prohibit them. The Switchblade Knife Act of 1958 remains a cornerstone in regulating them. Carrying these knives without proper authorization can lead to penalties.

Collectors often face challenges when purchasing or transporting switchblades. Some states allow possession at home but not public carry. This makes them highly controversial across the nation.

Pros:

• Quick access

• Compact size

• Tactical use

• Easy opening

• Collector appeal

• Durable design

• Efficient tool

Cons:

• Often illegal

• Misused easily

• Police scrutiny

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2. Ballistic Knives – Projectile Blades

Ballistic knives are completely banned under federal law. These knives fire detachable blades using a spring or gas mechanism. The design makes them dangerous and difficult to regulate.

Lawmakers view ballistic knives as weapons intended for offense, not utility. Their ability to launch a blade at high speed creates significant risks. This is why they are outlawed in all states.

Despite their notoriety, ballistic knives are rare. They are more popular in movies than in real life. Collectors may seek replicas, but functioning models are illegal nationwide.

Pros:

• Unique design

• High power

• Rare collectible

• Movie appeal

• Fast action

• Impressive mechanics

• Attention-grabbing

Cons:

• Fully banned

• Dangerous use

• No utility

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3. Gravity Knives – Flick Open Blades

Gravity knives open by the force of gravity or wrist action. They were originally designed for military paratroopers to cut parachute lines quickly. However, many states classify them as dangerous weapons.

New York famously banned gravity knives, leading to thousands of arrests. Although recent reforms reduced restrictions, they remain controversial. Other states continue enforcing bans on them.

These knives are often confused with regular folding knives. Police discretion plays a big role in enforcement. This makes them legally risky to own or carry.

Pros:

• Fast opening

• Military use

• Compact size

• Practical design

• Collector interest

• Tactical option

• Durable build

Cons:

• Easily banned

• Confused laws

• Police misuse

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4. Butterfly Knives – Balisongs

Butterfly knives, also called balisongs, feature two handles that rotate around the blade. They are popular for tricks and flipping demonstrations. However, they are banned in several states.

Hawaii and California are among the strictest states on balisongs. These laws often cite concerns about concealment and intimidation. Carrying a balisong can result in penalties.

Collectors enjoy balisongs for their unique mechanics. Unfortunately, legal restrictions limit their widespread ownership. This has led to heated debates over personal rights.

Pros:

• Stylish design

• Trick potential

• Collector appeal

• Compact folding

• Strong mechanics

• Durable structure

• Popular culture

Cons:

• Banned states

• Misuse risk

• Limited carry

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5. Dirk and Dagger Knives

Dirks and daggers are double-edged knives designed primarily for stabbing. They are often associated with combat rather than utility. Many states restrict their concealed carry.

California specifically bans carrying concealed daggers or dirks. The law sees them as offensive weapons. This creates a divide between collectors and lawmakers.

While legal for display or collection, dirks and daggers cannot be carried openly in some jurisdictions. Their design makes them controversial under weapon statutes.

Pros:

• Historic appeal

• Collector value

• Strong build

• Cultural history

• Tactical use

• Sharp edges

• Stylish look

Cons:

• Carry bans

• Combat image

• Restricted zones

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6. Bowie Knives – Large Fixed Blades

Bowie knives are large fixed-blade knives named after Jim Bowie. Their intimidating size makes them useful outdoors but controversial in cities. Some states restrict Bowie knife carry.

Texas once banned Bowie knives but later reformed laws. Other states still enforce bans or strict carry regulations. Their size often determines legality.

Hunters and outdoorsmen value Bowie knives for survival. However, urban restrictions make carrying them risky. This duality highlights regional differences in knife laws.

Pros:

• Outdoor use

• Survival tool

• Historical value

• Strong blade

• Collector item

• Durable design

• Large utility

Cons:

• Size bans

• Restricted carry

• Intimidating look

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7. Cane Knives – Concealed Blades in Canes

Cane knives hide blades inside walking sticks. They are considered concealed deadly weapons under U.S. law. Most states prohibit them entirely.

Lawmakers argue cane knives serve no lawful purpose. Their design focuses on concealment, making them dangerous. This led to nationwide restrictions.

Collectors may value them for novelty, but public carry is banned. Using cane knives for self-defense can lead to felony charges. They remain one of the least practical knives.

Pros:

• Concealed design

• Collector novelty

• Unique mechanics

• Historical interest

• Stylish appeal

• Rare find

• Conversation piece

Cons:

• Fully banned

• No utility

• High penalties

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8. Throwing Stars – Shuriken

Throwing stars, or shuriken, are banned in many U.S. states. These small, sharp weapons are associated with martial arts. Their offensive nature led to restrictions.

Some states allow ownership for display but prohibit public carry. Others ban them outright. Violations can lead to fines or charges.

Although popular in movies, throwing stars have limited real-world use. They remain collectibles rather than tools. Their reputation keeps them restricted.

Pros:

• Martial arts

• Collector value

• Unique design

• Small size

• Historic appeal

• Pop culture

• Decorative use

Cons:

• Limited utility

• Often banned

• Dangerous misuse

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9. Push Daggers – Concealed Knives

Push daggers feature a T-shaped handle and short blade. They are designed for concealed carry in self-defense. However, many states classify them as prohibited weapons.

California, New York, and Illinois restrict push daggers. Their small size and stabbing design make them controversial. Carrying them can lead to charges.

Collectors appreciate their compact efficiency. But their self-defense focus leads lawmakers to ban or restrict them. This keeps them from mainstream acceptance.

Pros:

• Compact size

• Self-defense

• Strong design

• Concealed easily

• Collector appeal

• Durable blade

• Tactical use

Cons:

• Restricted states

• Self-defense only

• Carry bans

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10. Belt Buckle Knives – Concealed Weapons

Belt buckle knives disguise blades inside belt buckles. They are classified as concealed weapons in most states. Federal law prohibits interstate commerce of concealed blades.

While marketed as survival tools, belt buckle knives are controversial. Their hidden design makes them illegal in many jurisdictions. Law enforcement considers them deceptive.

Collectors may value them for novelty. However, carrying them publicly is highly restricted. This limits their usefulness and legality.

Pros:

• Concealed style

• Survival appeal

• Unique design

• Collector value

• Stylish look

• Rare item

• Compact utility

Cons:

• Conceal bans

• Illegal carry

• Misuse risk

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FAQs – What Knife Is Banned in the US?

1. Are all switchblades illegal in the US?
No, some states allow them, but federal law bans interstate commerce without permits.

2. Is it legal to own a butterfly knife?
It depends on the state. Some like Hawaii ban them completely.

3. Are Bowie knives banned nationwide?
No, but some states restrict carrying them in public.

4. Can I own a ballistic knife?
No, they are fully banned under federal law.

5. Are throwing stars legal for martial arts?
Some states allow them for training but not public carry.

6. Do knife bans apply to collectors?
Yes, though display ownership may be permitted in certain states.

7. Which knife is the most restricted nationwide?
Ballistic knives are the most universally banned in the U.S.

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Conclusion

Knives in the United States are regulated through a mix of federal and state laws. Some, like ballistic knives, cane knives, and belt buckle knives, are banned nationwide.

Others, such as switchblades, butterfly knives, and gravity knives, are restricted differently across states.

Understanding these restrictions is essential for collectors, outdoor enthusiasts, and travelers. Ignorance of the law can lead to fines, confiscation, or even jail time. Always check local ordinances before carrying or purchasing a knife.

While some of these bans focus on public saf