Is Butterfly Knives Legal in Massachusetts? (2026)
Yes — Butterfly Knives are legal in Massachusetts as of 2026.
Law changed in 2024: A 2024 court ruling overturned the ban on switchblades, but this did not directly impact butterfly knife laws.
Quick Answer
Butterfly knives are legal to own and carry in Massachusetts with no specific restrictions beyond general knife laws. A 2024 court ruling overturned the ban on switchblades, but this did not directly impact butterfly knife laws.
- Age restriction: 18+ for purchase
What the Law Says
Massachusetts law prohibits the carrying of double-edged knives. Single-edged butterfly knives are legal to carry.
— M.G.L. c. 269, § 10
| Category | Details |
|---|---|
| Possession | Legal |
| Sale & Purchase | Legal |
| Penalties | N/A |
| Age Restriction | 18+ for purchase |
| Pending Legislation | None known |
A 2024 court ruling overturned the ban on switchblades, but this did not directly impact butterfly knife laws.
Enforcement Reality
Butterfly knives are legal to own and carry in Massachusetts, but they cannot be double-edged. Enforcement is strict on the double-edged blade prohibition.
A common mistake is carrying a double-edged butterfly knife, which is illegal and will be prosecuted.
Local Exceptions
None identified. State law applies uniformly across Massachusetts. Local ordinances may still vary — check with your city or county government for any additional rules.
Bottom Line
Butterfly Knives are legal in Massachusetts. You can carry them without violating state law, though federal rules and local ordinances may still apply. Always verify current law before acting.
Massachusetts vs. the Rest of the US
Across the US, carrying a butterfly knife is fully legal in 39 states, restricted in 10, and illegal in 1. Massachusetts falls in the LEGAL category.
View the full 50-state map →Neighboring States
Laws change at state lines. Here is how bordering states compare on Butterfly Knives:
Frequently Asked Questions
Is it legal to carry Butterfly Knives in Massachusetts?
Can you carry a butterfly knife in Massachusetts?
What is the age restriction for carrying a butterfly knife in Massachusetts?
Does the law on carrying a butterfly knife change at the Massachusetts border?
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Reviewed by cross-referencing the cited state statute against current legislative databases and regulatory publications.
Sources & Verification
This page was reviewed by Ethan Harper by comparing the legal status against the cited state statute. AllowedHere is an informational resource and does not provide legal advice. Consult a licensed attorney for guidance specific to your situation.
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