In Massachusetts, owning and carrying a knife isn’t just about choosing a blade you like — it’s about following the law carefully. The state has strict knife rules to keep people safe while also allowing individuals to carry certain types of knives for work, home use, or hobbies.
This guide will help you understand what knives you can legally carry in Massachusetts, where you can carry them, and under what conditions. If you’re unsure about your knife rights in the state, this article will clear things up in simple terms so you don’t get into legal trouble.
Key Knife Laws in Massachusetts
Massachusetts laws focus on safety, and under Section 10, the state lists several weapons that are banned or restricted. These include knives with detachable or locking blades, switchblades longer than 1.5 inches, daggers, stilettos, throwing knives, and many more.
Carrying these knives in public places like schools, government buildings, or prisons without permission is illegal. You must understand which knives are allowed and how they should be carried.
Legal Knives You Can Carry in Massachusetts
Folding Knives (Pocket Knives)
Pocket knives that fold into the handle are legal in Massachusetts. There is no limit on blade length for these knives, and they’re widely used for daily tasks like cutting ropes or opening packages. However, using them to threaten or harm someone is illegal.
Household and Utility Knives
Kitchen knives, multi-tools, and utility blades are legal as long as they are used properly. You can carry these at home, at work, or for tasks like DIY repairs. But if you misuse them or carry them in public places without reason, you could face legal trouble.
Craft Knives
Craft knives used for hobbies and creative work are also legal. These knives are used for fine cutting tasks like model-making or artwork. There are no strict rules for them, but they must not be used in a threatening way.
Knives That Are Restricted or Banned
Box Cutters or Utility Knives
Box cutters are allowed for work use but are considered dangerous if carried without a proper reason. Since they have a locking blade, carrying them in public without a valid excuse may result in legal action.
Double-Edged Knives
These knives have sharp edges on both sides and are usually linked to combat. Due to their high risk, carrying one without reason is restricted in Massachusetts.
Automatic Cutters (Switchblades)
Switchblades with blades longer than 1.5 inches are banned in Massachusetts. Their fast opening and easy hiding make them dangerous. These knives are heavily regulated for public safety.
Places Where Knives Are Not Allowed
Government Buildings
Knives are completely banned in places like government offices, courts, and prisons. Even legal knives are not allowed here due to strict security.
Schools and School Zones
No knife is allowed on school property or within 300 feet of a school. This includes kitchen knives or folding knives. Bringing a knife to school is a serious offense and can lead to harsh legal punishment.
Public Events
Massachusetts bans knives at crowded public events such as concerts, festivals, and rallies. The aim is to avoid any risk of violence or accidents in busy places.
Age and Occupation-Based Knife Laws
Age Restrictions
While Massachusetts does not have a statewide minimum age for carrying knives, cities like Boston ban the sale of knives with blades over 2 inches to people under 18. In Cambridge, you can’t give a locking knife to someone under 18.
Special Occupations
Police, army, and emergency workers are allowed to carry certain restricted knives for job-related tasks. However, misuse of these knives, even by professionals, can result in punishment.
Rules for Minors
Minors are not allowed to carry knives unless it’s for a valid reason, like for school projects, job work, or under adult supervision. Parents should guide their children about knife safety and laws.
Penalties for Breaking Knife Laws in Massachusetts
Carrying banned knives like switchblades or using any knife to harm someone is a criminal offense. First-time offenders may face a fine or jail time. Repeat offenders or those caught with dangerous weapons in schools or public places can face prison time up to 5 years.
Even lending a weapon that gets used in a crime can get you in trouble. Always carry knives responsibly, and if in doubt, consult with a lawyer.
Legal Help and Court Examples
If you’re charged with a knife offense, it’s best to hire a lawyer. They can help you understand the law and fight the case. Some court cases in Massachusetts have shown how strict the law is:
Commonwealth v. Alem A. – A teen caught with a double-edged knife was found guilty, and the court said this type of weapon isn’t protected under the Second Amendment.
Caetano v. Massachusetts – A woman was convicted for carrying a stun gun. The court ruled that stun guns are not protected for self-defense under current laws.
These examples show that even common weapons can result in serious legal problems if misused or carried in the wrong places.
Massachusetts knife laws are clear — you can carry folding knives, kitchen tools, and craft knives legally as long as you use them responsibly.
But carrying switchblades, double-edged blades, or any knife in schools or public buildings is illegal and can lead to harsh punishment.
Always make sure to know the laws in your local area, especially in cities like Boston and Cambridge where rules may be stricter. When in doubt, carry only what’s necessary and avoid risky situations. This knowledge can help you stay safe and avoid legal trouble.
