🏖️ New Jersey Knife Laws
Overview
New Jersey does not have statewide preemption, so local ordinances may impose additional restrictions. Both open and concealed carry face restrictions. There is no general blade length restriction. Switchblades, disguised knives, and ballistic knives have restrictions.
Quick Legal Facts
Carry Laws & Blade Length
New Jersey does not distinguish between open and concealed carry for knives. Under N.J.S.A. 2C:39-5(d), any person who knowingly possesses any weapon under circumstances not manifestly appropriate for such lawful uses as it may have is guilty of a fourth-degree crime. Under N.J.S.A. 2C:39-3(e), specifically named knives (gravity knives, switchblades, daggers, dirks, stilettos, ballistic knives) require an explainable lawful purpose. Open carry of ordinary knives is permitted when circumstances are manifestly appropriate for a lawful use (e.g., hunting, fishing, work).
Concealment is not a separate issue under New Jersey law. The same standards apply regardless of whether a knife is carried openly or concealed. Under N.J.S.A. 2C:39-5(d), possession of any weapon under circumstances not manifestly appropriate for lawful use is a fourth-degree crime. Under N.J.S.A. 2C:39-3(e), possession of gravity knives, switchblades, daggers, dirks, stilettos, or ballistic knives without an explainable lawful purpose is a fourth-degree crime. Courts have held that carrying a knife for self-defense outside the home is not a lawful purpose (State v. Montalvo, 2017).
New Jersey has no general blade length limit for adults. However, N.J.S.A. 2C:39-9.1 prohibits the sale of hunting, fishing, combat, or survival knives with a blade length of 5 inches or more or an overall length of 10 inches or more to persons under 18. This applies to sales to minors only and does not restrict adult possession or carry. The legality of carrying any knife depends on the 'manifestly appropriate' and 'explainable lawful purpose' standards, not blade length.
Knife Type Legality
| Knife Type | Status | Details |
|---|---|---|
| Switchblades | Restricted | Switchblades are defined under N.J.S.A. 2C:39-1(p) as any knife with a blade that opens automatically by hand pressure applied to a button, spring, or other device in the handle. Under N.J.S.A. 2C:39-3(e), possession without an explainable lawful purpose is a fourth-degree crime. Not an absolute ban: possession is lawful if the person can demonstrate an explainable lawful purpose. Manufacturing, selling, or transporting switchblades is prohibited under N.J.S.A. 2C:39-9(d). |
| Balisongs / Butterfly Knives | Unclear | Balisong (butterfly) knives are not mentioned by name in New Jersey statutes. The critical question is whether they qualify as gravity knives under N.J.S.A. 2C:39-1(h), which defines a gravity knife as any knife with a blade released by the force of gravity or the application of centrifugal force. Because balisongs can be opened using centrifugal force (flipping), they may fall under this definition. If classified as gravity knives, the same restrictions under N.J.S.A. 2C:39-3(e) apply: possession without an explainable lawful purpose is a fourth-degree crime. |
| Disguised Knives | Restricted | Disguised knives (cane swords, belt buckle knives, lipstick knives, pen knives) are not specifically enumerated in N.J.S.A. 2C:39-3(e). However, they may be classified as daggers, dirks, or stilettos depending on blade configuration, triggering the 'explainable lawful purpose' requirement. Additionally, under the catch-all provision of N.J.S.A. 2C:39-5(d), any weapon possessed under circumstances not manifestly appropriate for lawful use is a fourth-degree crime. The concealed and deceptive nature of disguised knives makes establishing manifestly appropriate circumstances difficult. |
| Assisted-Opening | Legal | Assisted-opening knives are not specifically addressed in New Jersey statutes. They are generally considered legal because they require manual initiation (thumb stud or flipper) before a spring assists the blade open. This distinguishes them from switchblades under N.J.S.A. 2C:39-1(p), which defines switchblades as knives that open 'automatically' by pressure on a button, spring, or other device in the handle. However, like any knife, they are subject to the 'manifestly appropriate' standard under N.J.S.A. 2C:39-5(d). |
| Ballistic Knives | Restricted | Ballistic knives are defined under N.J.S.A. 2C:39-1(u) as any weapon or device capable of lethal use that can propel a knife blade. Under N.J.S.A. 2C:39-3(e), possession without an explainable lawful purpose is a fourth-degree crime. Manufacturing, selling, or transporting ballistic knives is prohibited under N.J.S.A. 2C:39-9(d). Federal law (15 U.S.C. § 1245) independently restricts ballistic knives. |
Relevant Statutes(10)
- 2C:39-1—Weapons Definitions
- 2C:39-2—Certain Persons Not to Have Weapons
- 2C:39-3—Prohibited Weapons and Devices
- 2C:39-4—Possession for Unlawful Purpose
- 2C:39-5—Unlawful Possession of Weapons
- 2C:39-6—Weapons Possession Exemptions
- 2C:39-7—Certain Persons Prohibited from Weapons
- 2C:39-9.1—Stun Guns Regulation
- 2C:39-9—Manufacturing and Distribution
- 2C:40-18—Grave Desecration Weapons Prohibition
Legal Disclaimer
This information is provided for general educational purposes and should not be construed as legal advice. Laws change frequently and local ordinances may impose additional restrictions beyond state law. Always verify with official state sources before making decisions about knife carry or ownership. KnifeInformer is not a law firm — consult a qualified attorney for specific legal questions.
