New Jersey Knife Laws (2026): Possession Ban and Minor Sales

New Jersey names a specific list of knife types, gravity knife, switchblade knife, dagger, dirk, stiletto, and ballistic knife, and bans possessing any of them without an explainable lawful purpose. A separate, broader statute reaches any other knife carried under circumstances that are not manifestly appropriate for a lawful use, and possessing any knife with a purpose to use it unlawfully is a more serious offense on top of either one. A certain-persons ban, a manufacture-and-sale ban, a sale-to-minors statute, and a stricter school rule add further layers, and New Jersey's general Criminal Code preemption clause reaches a conflicting local knife ordinance.

Jurisdiction scope: This page covers New Jersey state law only, principally N.J.S.A. 2C:1-5, 2C:39-1, 2C:39-3, 2C:39-4, 2C:39-5, 2C:39-6, 2C:39-7, 2C:39-9, and 2C:39-9.1. It does not cover New Jersey's handgun-permit and firearms-purchaser-identification-card statutes in detail, since they govern firearms rather than knives.

Can you own or carry a knife in New Jersey?

Owning or carrying a gravity knife, switchblade knife, dagger, dirk, stiletto, or ballistic knife in New Jersey requires an "explainable lawful purpose." N.J.S.A. § 2C:39-3(e) provides: "Any person who knowingly has in his possession any gravity knife, switchblade knife, dagger, dirk, stiletto, billy, blackjack, metal knuckle, sandclub, slingshot, cestus or similar leather band studded with metal filings or razor blades imbedded in wood, or ballistic knife, without any explainable lawful purpose, is guilty of a crime of the fourth degree." This offense applies the same way whether the knife is carried openly or concealed; New Jersey does not draw an open-versus-concealed distinction for this list of items. Two broader and more serious statutes reach other knives and unlawful use, a certain-persons ban and a manufacture-and-sale ban add further layers, and each is described below.

Three narrow definitions, several undefined terms

New Jersey's general weapons definitions, at N.J.S.A. § 2C:39-1, define only three of the knife-related terms that appear in the prohibited-weapons list. "Gravity knife," under subsection h, "means any knife which has a blade which is released from the handle or sheath thereof by the force of gravity or the application of centrifugal force." "Switchblade knife," under subsection p, "means any knife or similar device which has a blade which opens automatically by hand pressure applied to a button, spring, or other device in the handle of the knife." "Ballistic knife," under subsection u, "means any weapon or other device capable of lethal use and which can propel a knife blade." The remaining terms in 2C:39-3(e)'s list, dagger, dirk, stiletto, and "other dangerous knife" (used in the general "weapon" definition at subsection r), are not separately defined by the statute. The "weapon" definition itself, subsection r, states that a weapon is "anything readily capable of lethal use or of inflicting serious bodily injury," and lists, among its examples at paragraph (3), "gravity knives, switchblade knives, daggers, dirks, stilettos, or other dangerous knives, billies, blackjacks, bludgeons, metal knuckles, sandclubs, slingshots, cesti, or similar leather bands studded with metal filings or razor blades imbedded in wood," and, at paragraph (4), stun guns and tear-gas devices. Paragraph (3)'s list is close to, but not identical to, 2C:39-3(e)'s: it adds "other dangerous knives" and "bludgeons," and it does not include the ballistic knife that 2C:39-3(e) separately names.

Possessing a knife with a purpose to use it unlawfully

A separate and more serious offense applies regardless of whether the knife is on the 2C:39-3(e) list at all. N.J.S.A. § 2C:39-4(d), titled "Other weapons," provides: "Any person who has in his possession any weapon, except a firearm, with a purpose to use it unlawfully against the person or property of another is guilty of a crime of the third degree." New Jersey courts have described N.J.S.A. 2C:39-3, 2C:39-4, and 2C:39-5 together as an integrated scheme of graduated possessory weapons offenses, moving from a general "weapon" possessed with an unlawful purpose (the most serious, a third-degree crime under 2C:39-4), to specific per se weapons possessed without an explainable lawful purpose (2C:39-3(e), a fourth-degree crime), to other weapons possessed under circumstances not manifestly appropriate for a lawful use (2C:39-5(d), also fourth degree). A prosecutor is not limited to the fourth-degree offenses described elsewhere on this page if the facts show the knife was possessed to be used unlawfully.

A second, broader statute for other knives, and a constitutional limit at home

N.J.S.A. § 2C:39-5(d), titled "Other weapons," provides: "Any person who knowingly has in his possession any other weapon under circumstances not manifestly appropriate for such lawful uses as it may have is guilty of a crime of the fourth degree." This is a separate offense from both 2C:39-3(e) and 2C:39-4(d). Where 2C:39-3(e) names a specific list of knife types and bans possession without an explainable lawful purpose, 2C:39-5(d) is a general catch-all that can reach an ordinary knife not on that specific list, such as a plain kitchen or utility knife, when the manner and circumstances of carrying it are "not manifestly appropriate" for a lawful use.

The New Jersey Supreme Court has put a constitutional limit on this statute as applied inside a person's own home. In State v. Montalvo, 229 N.J. 300 (2017), a defendant was convicted under 2C:39-5(d) for retrieving a machete from a closet and answering his door with it after a threatening encounter with a neighbor, to protect himself and his pregnant wife. The Court held that the defendant "had a constitutional right to possess the machete in his home for his own defense and that of his pregnant wife," reasoning that the right to possess a weapon at home for self-defense "would be of little effect if one were required to keep the weapon out-of-hand, picking it up only 'spontaneously,'" and found the jury instructions erroneous for failing to convey that principle. A knife possessed inside one's own home for self-defense is not automatically outside 2C:39-5(d)'s reach, but the circumstances-not-manifestly-appropriate standard has to be applied consistently with this constitutional protection.

The hunting and fishing exemption reaches only the broader statute

N.J.S.A. § 2C:39-6(f) begins: "Nothing in subsections b., c., and d. of N.J.S.2C:39-5 shall be construed to prevent," and then, in paragraph (2), exempts "[a] person carrying a firearm or knife in the woods or fields or upon the waters of this State for the purpose of hunting, target practice or fishing, provided that the firearm or knife is legal and appropriate for hunting or fishing purposes in this State and the person has in the person's possession a valid hunting license, or, with respect to fresh water fishing, a valid fishing license." Paragraph (3) similarly exempts a person transporting a firearm or knife directly to or from a place of hunting, fishing, or target practice with a valid license, provided the person complies with Title 23 for the target-range branch. Unlike paragraph (2)'s carrying-while-hunting exemption, the paragraph (3) transport exemption is conditioned: N.J.S.A. § 2C:39-6(g) requires that a weapon transported under paragraph (3) of subsection f. "be carried unloaded and contained in a closed and fastened case, gunbox, securely tied package, or locked in the trunk of the automobile in which it is being transported, and in the course of travel shall include only deviations as are reasonably necessary under the circumstances." A knife carried loose in the passenger compartment while in transit to or from hunting or fishing falls outside the exemption even with a valid license. Because this exemption is expressly written to reach only subsections b., c., and d. of 2C:39-5, which does not include 2C:39-3, it exempts conduct only from the "other weapons" catch-all in 2C:39-5(d), not from 2C:39-3(e)'s specific ban on a gravity knife, switchblade knife, dagger, dirk, stiletto, or ballistic knife, and not from 2C:39-4(d)'s unlawful-purpose offense.

Schools: a stricter rule with no lawful-purpose defense

N.J.S.A. § 2C:39-5(e)(2) provides: "Any person who knowingly possesses any weapon enumerated in paragraphs (3) and (4) of subsection r. of N.J.S.2C:39-1 or any components which can readily be assembled into a firearm or other weapon enumerated in subsection r. of N.J.S.2C:39-1 or any other weapon under circumstances not manifestly appropriate for such lawful use as it may have, while in or upon any part of the buildings or grounds of any school, college, university or other educational institution without the written authorization of the governing officer of the institution is guilty of a crime of the fourth degree." Subsection r's paragraph (3) lists "gravity knives, switchblade knives, daggers, dirks, stilettos, or other dangerous knives, billies, blackjacks, bludgeons, metal knuckles, sandclubs, slingshots, cesti, or similar leather bands studded with metal filings or razor blades imbedded in wood," which is close to but broader than 2C:39-3(e)'s named-knife list (it adds "other dangerous knives" and "bludgeons"), and does not separately name a ballistic knife, though one would likely still fall within the paragraph's general "anything readily capable of lethal use" definition of a weapon. Paragraph (4) adds stun guns and tear-gas devices. This school-grounds offense does not carry 2C:39-3(e)'s "explainable lawful purpose" defense; instead, the only way to lawfully possess a listed knife or an otherwise-inappropriate weapon on school property is with the governing officer's written authorization.

Certain persons may not possess these knives at all

Apart from the felony conviction itself, some people are separately barred from possessing the very knives described above, without an "explainable lawful purpose" defense. N.J.S.A. § 2C:39-7(a) provides that a person previously convicted (in New Jersey or elsewhere) of aggravated assault, arson, burglary, escape, extortion, homicide, kidnapping, robbery, aggravated sexual assault, sexual assault, bias intimidation, carjacking, gang criminality, racketeering, terroristic threats, certain firearms offenses, or endangering the welfare of a child; or convicted of a crime under N.J.S.A. 2C:39-3, 2C:39-4, or 2C:39-9; or ever committed for a mental disorder without a doctor's certificate of recovery; or convicted of most controlled-substance offenses, "who purchases, owns, possesses or controls any of the specified weapons or any ammunition ... is guilty of a crime of the fourth degree." The "specified weapons" are those enumerated in N.J.S.A. 2C:39-1(r), which includes a gravity knife, switchblade knife, dagger, dirk, stiletto, and other dangerous knife. For a person in one of these categories, the "explainable lawful purpose" defense that applies to the general public under 2C:39-3(e) is not available.

Exceptions for the military, law enforcement, and security guards

N.J.S.A. § 2C:39-3(g)(1)(a) exempts, from subsection e among others, "any member of the Armed Forces of the United States or the National Guard, or except as otherwise provided, to any law enforcement officer while actually on duty or traveling to or from an authorized place of duty," provided the possession is duly authorized under applicable laws, regulations, or orders. A separate exception, N.J.S.A. § 2C:39-3(i), provides: "Nothing in subsection e. of this section shall be construed to prevent any guard in the employ of a private security company, who is licensed to carry a firearm, from the possession of a nightstick when in the actual performance of his official duties, provided that he has satisfactorily completed a training course approved by the Police Training Commission in the use of a nightstick." This nightstick exception does not extend to a knife.

Manufacturing, transporting, and selling these knives

Separately from possessing a listed knife, New Jersey also bans the commercial and transport side of the same items, at any buyer's age and with no "explainable lawful purpose" defense written into the subsection. N.J.S.A. § 2C:39-9(d) provides: "Any person who manufactures, causes to be manufactured, transports, ships, sells or disposes of any weapon, including gravity knives, switchblade knives, ballistic knives, daggers, dirks, stilettos, billies, blackjacks, metal knuckles, sandclubs, slingshots, cesti or similar leather bands studded with metal filings, ... is guilty of a crime of the fourth degree." This is a separate offense from 2C:39-3(e)'s possession ban, and from the age-based sale rule below.

Selling a large fixed-blade knife to a minor

A separate statute, specific to a buyer's age rather than to a knife type on the 2C:39-1(r) list, is N.J.S.A. § 2C:39-9.1: "A person who sells any hunting, fishing, combat or survival knife having a blade length of five inches or more or an overall length of 10 inches or more to a person under 18 years of age commits a crime of the fourth degree." The statute allows an affirmative defense, provable by a preponderance of the evidence, if the seller can show the purchaser presented a driver's license or similar photo identification falsely showing an age of 18 or older, the purchaser's appearance would lead an ordinarily prudent person to believe they were 18 or older, and the sale was made in good faith relying on those two facts. This rule applies on top of, not instead of, 2C:39-9(d)'s general manufacture-and-sale ban above.

New Jersey's general Code preemption clause reaches knife ordinances

New Jersey has no knife-specific preemption statute, but its Criminal Code carries a general preemption clause that reaches a conflicting local knife ordinance. N.J.S.A. § 2C:1-5(d) provides: "Notwithstanding any other provision of law, the local governmental units of this State may neither enact nor enforce any ordinance or other local law or regulation conflicting with, or preempted by, any provision of this code or with any policy of this State expressed by this code, whether that policy be expressed by inclusion of a provision in the code or by exclusion of that subject from the code." In State v. Crawley, 90 N.J. 241 (1982), the New Jersey Supreme Court applied this clause to bar enforcement of a Newark loitering ordinance, holding that the Code's omission of a general loitering offense expressed a state policy not to penalize that conduct and that chapter 33 of the Code preempts overlapping municipal legislation. Chapter 39's weapons offenses, including the knife provisions described on this page, are part of the same Code. A local ordinance that conflicts with, or is preempted by, chapter 39's treatment of knives would be void under 2C:1-5(d)'s text; this is a harder, fact-specific question than a flat statement that no preemption statute exists.

Federal law: what it does and does not reach

Federal law does not ban an individual from owning or carrying a switchblade. The Federal Switchblade Act, 15 U.S.C. §§ 1241 to 1245, instead restricts interstate commerce in switchblade knives, barring their manufacture for, or introduction, transport, and sale in, interstate commerce, and, in 15 U.S.C. § 1245, makes it a federal offense to knowingly possess, manufacture, sell, or import a ballistic knife in or affecting interstate commerce or within federal territorial jurisdiction. The two switchblade offense sections, §§ 1242 and 1243, do not apply to certain knives and people, listed as exemptions in 15 U.S.C. § 1244. A 2009 amendment, § 1244(5), exempts any knife with a spring, detent, or other closure-bias mechanism that requires hand, wrist, or arm exertion on the blade itself to overcome the bias and assist opening, the carve-out that keeps modern assisted-opening folding knives legal in interstate commerce. A separate exemption, § 1244(4), covers a person with only one arm possessing or carrying a switchblade with a blade three inches or less. New Jersey's own switchblade ban, at 2C:39-3(e), is a state possession offense independent of the federal interstate-commerce restrictions and does not carry either federal exemption.

Disclaimer: This article provides general legal information about New Jersey's knife laws as of September 2026. It is not legal advice. Consult a lawyer licensed in New Jersey for advice about a specific situation. What counts as an "explainable lawful purpose" or circumstances "not manifestly appropriate" depends on the specific facts and is ultimately for a court to decide.

For a state-by-state comparison, see knife laws by state. New Jersey's self-defense statutes are covered separately on the New Jersey self-defense laws page.

Statutes cited reflect their in-force version as of 2026-09-18. Last updated: 2026-09-18.

Frequently Asked Questions

Are switchblades illegal in New Jersey?

Possessing a switchblade knife without an explainable lawful purpose is a crime of the fourth degree under N.J.S.A. 2C:39-3(e). New Jersey's Supreme Court has held that this does not relieve the State of its burden of proof; it shifts to the defendant only the burden of going forward with evidence of a lawful purpose. Manufacturing, transporting, or selling a switchblade is a separate fourth-degree crime under N.J.S.A. 2C:39-9(d), and a person in a certain-persons category under N.J.S.A. 2C:39-7(a) may not possess one at all.

Can you carry a pocket knife in New Jersey?

An ordinary pocket knife is not named in N.J.S.A. 2C:39-3(e)'s specific list (gravity knife, switchblade, dagger, dirk, stiletto, ballistic knife). It can still fall under the broader 'other weapons' offense in N.J.S.A. 2C:39-5(d), which bans possessing any weapon 'under circumstances not manifestly appropriate for such lawful uses as it may have,' or, if possessed to be used unlawfully against a person or property, the more serious third-degree offense in N.J.S.A. 2C:39-4(d).

Can you keep a knife in your home for self-defense in New Jersey?

New Jersey's Supreme Court, in State v. Montalvo (2017), held that a person has a constitutional right to possess a weapon, in that case a machete, in their own home for self-defense, and that the right would be of little effect if a person had to keep it out of hand and pick it up only spontaneously when danger arose. This does not make every knife possessed at home automatically lawful under N.J.S.A. 2C:39-5(d); it means the 'circumstances not manifestly appropriate' standard has to be applied consistently with that constitutional protection.

Can you carry a knife hunting or fishing in New Jersey?

Yes, for a knife that is legal and appropriate for hunting or fishing, with a valid hunting or fishing license, under the exemption in N.J.S.A. 2C:39-6(f)(2)-(3). If the knife is being transported to or from the hunting, fishing, or target-practice location rather than carried in the field under paragraph (2), N.J.S.A. 2C:39-6(g) requires it be carried unloaded and in a closed and fastened case, gunbox, securely tied package, or locked in the vehicle's trunk. That exemption applies only to N.J.S.A. 2C:39-5(d)'s broader 'other weapons' offense, not to the specific gravity knife, switchblade, dagger, dirk, stiletto, or ballistic knife ban in N.J.S.A. 2C:39-3(e), and not to the unlawful-purpose offense in N.J.S.A. 2C:39-4(d).

What size knife is illegal to sell to a minor in New Jersey?

Selling a hunting, fishing, combat, or survival knife with a blade of 5 or more inches, or an overall length of 10 or more inches, to a person under 18 is a crime of the fourth degree under N.J.S.A. 2C:39-9.1, subject to an affirmative defense for a seller who reasonably relied on false identification and the appearance of age. Separately, manufacturing, transporting, or selling a gravity knife, switchblade knife, ballistic knife, dagger, dirk, or stiletto to anyone, regardless of age, is its own fourth-degree crime under N.J.S.A. 2C:39-9(d).

Can a convicted felon possess a knife in New Jersey?

Not if it is a gravity knife, switchblade knife, dagger, dirk, stiletto, or other dangerous knife enumerated in N.J.S.A. 2C:39-1(r), for a person previously convicted of a specified violent or weapons offense, or of certain controlled-substance offenses, or ever committed for a mental disorder without a doctor's certificate of recovery. N.J.S.A. 2C:39-7(a) makes this a crime of the fourth degree, without an 'explainable lawful purpose' defense.

Does New Jersey preempt local knife ordinances?

There is no knife-specific preemption statute, but New Jersey's general Criminal Code preemption clause, N.J.S.A. 2C:1-5(d), voids a local ordinance that conflicts with, or is preempted by, the Code, including chapter 39's knife provisions. The New Jersey Supreme Court has applied this clause to bar enforcement of a municipal ordinance preempted by the Code of Criminal Justice; whether a specific local knife ordinance conflicts with, or is preempted by, chapter 39 is a fact-specific question rather than a flat no.