Is Switchblades / Automatic Knives Legal in New Hampshire? (2026)
Partially — Switchblades / Automatic Knives are legal with restrictions in New Hampshire as of 2026.
Law changed in 2010: The law was clarified in 2010 to remove any ambiguity about the legality of switchblades. No major changes since.
Quick Answer
New Hampshire RSA 159:3 prohibits the possession and sale of switchblade knives with blades longer than 1.5 inches. Automatic knives with blades shorter than 1.5 inches are legal. The law restricts larger switchblades but allows smaller automatic knives.
- Prohibited for convicted felons under federal law
What the Law Says
New Hampshire law does not prohibit the possession or carry of switchblades for most adults. It is a felony for a convicted felon to possess a switchblade.
— New Hampshire Knife Law Summary, NH Department of Safety
| Category | Details |
|---|---|
| Possession | Illegal to possess switchblades with blades longer than 1.5 inches. |
| Sale & Purchase | Illegal to sell switchblades with blades longer than 1.5 inches. |
| Penalties | Misdemeanor punishable by fines and/or imprisonment. |
| Age Restriction | None specified. |
| Pending Legislation | None known |
The law was clarified in 2010 to remove any ambiguity about the legality of switchblades. No major changes since.
Enforcement Reality
New Hampshire has very permissive knife laws. Switchblades are legal to own and carry, openly or concealed. Enforcement is focused on criminal intent.
A common mistake is for a convicted felon to possess a switchblade. This is illegal.
Local Exceptions
None identified. State law applies uniformly across New Hampshire. Local ordinances may still vary — check with your city or county government for any additional rules.
Real-World Scenarios: Switchblades / Automatic Knives in New Hampshire
Can You Fly With Switchblades / Automatic Knives Out of New Hampshire?
Since switchblades / automatic knives is restricted in New Hampshire, bringing it to the airport compounds your legal exposure. You're now dealing with both state law and federal jurisdiction. Don't do it.
Can You Cross State Lines With Switchblades / Automatic Knives From New Hampshire?
This is where people get burned. New Hampshire treats switchblades / automatic knives as restricted, but neighboring Maine treats it as legal. The law changes at the state line — not gradually, not with a warning sign, instantly. "I bought it legally" is not a defense in the new state. Interstate highways near the New Hampshire/Maine border are known enforcement corridors. If you're driving with out-of-state plates in a state where switchblades / automatic knives is illegal, you're a target.
Bottom Line
Switchblades / Automatic Knives are legal with restrictions in New Hampshire. This product is permitted, but specific conditions apply. Violating those conditions can result in fines or criminal charges. Read the rules carefully and consult an attorney if unsure.
New Hampshire vs. the Rest of the US
Across the US, carrying a switchblade is fully legal in 19 states, restricted in 17, and illegal in 14. New Hampshire falls in the RESTRICTED category.
View the full 50-state map →Body Armor Laws Guide
This topic is closely related to body armor and self-defense laws.
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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