Delaware Knife Laws: What Determines Legal Carry

For decades, carrying certain knives in Delaware could expose someone to felony charges without much warning. The state’s knife laws were stricter than many people realized, and plenty of residents carried everyday blades without knowing they were close to a legal boundary.

That changed on July 30, 2025, when Governor Matt Meyer signed Senate Bill 108 into law, ending a switchblade ban in place since 1953. The legislation did more than legalize automatic knives. It also expanded the definition of an “ordinary pocketknife” under Delaware’s criminal code.

For anyone who carries a knife for work, utility, or daily use, the legal landscape now looks different from what it did before. Knowing how the new definition applies and how the state classifies other knives determines whether carry is routine or a criminal offense.

What Determines Knife Legality in Delaware

• Delaware legalized automatic (switchblade) knives on July 30, 2025, ending a 72-year ban.

• An “ordinary pocketknife” is now defined as a knife with a blade up to 3.75 inches, increased from the previous 3-inch limit.

• The word “folding” was removed from the pocketknife definition, meaning all types of knives can qualify.

• Any knife that does not meet the pocketknife definition is classified as a “deadly weapon” under Delaware law.

• Open carry of a deadly weapon is legal; concealed carry without a permit is a felony.

• Knuckles, combination knives, and undetectable knives remain illegal.

• Delaware does not have statewide preemption so that local jurisdictions can set their own rules.

• The Concealed Deadly Weapons permit covers knives classified as deadly weapons, not only firearms.

How Delaware Defines a Knife Under the Law

Delaware law treats knives as potentially deadly weapons under Title 11 of the Delaware Code. The determining factor is blade length and how the knife is carried. A knife with a blade of 3.75 inches or less, carried in a closed position, falls under the “ordinary pocketknife” category and is not considered a deadly weapon.

Anything with a longer blade, or carried in an open or exposed position that doesn’t meet the pocketknife criteria, gets classified as a deadly weapon.

Before Senate Bill 108 passed, the definition of an ordinary pocketknife included the word “folding,” and the maximum blade length was 3 inches. The new law removed that restriction, so fixed-blade knives and automatic knives can now qualify as ordinary pocketknives if their blades are under 3.75 inches.

One point worth noting comes from a 2002 Delaware Supreme Court ruling. In State v. Harmon (800 A.2d 1289), the court determined that blade length means the entire length of the knife minus the handle.

It does not matter how much of the blade is sharpened. If the metal portion extending from the handle exceeds 3.75 inches, that knife is a deadly weapon in the eyes of Delaware law.

The 2025 Switchblade Legalization

Delaware had banned the sale, offering for sale, and possession of switchblade knives since 1953. Senate Bill 108, signed by Governor Matt Meyer on July 30, 2025, removed those restrictions entirely. The law went into effect immediately upon signing.

This was a bipartisan effort. The bill passed with bipartisan support in the state legislature and brought Delaware in line with the vast majority of states nationwide. As of the signing, only three states still restrict civilian possession of automatic knives: New Mexico, Minnesota, and Washington.

The practical result is straightforward. You can now legally buy, own, sell, and carry an automatic knife in Delaware. But the blade-length rules and concealed-carry restrictions still apply. A switchblade with a blade over 3.75 inches is treated as a deadly weapon, and carrying it concealed without a permit is a felony.

How Delaware Treats Open and Concealed Carry

Delaware draws a firm line between open and concealed carry of knives classified as deadly weapons.

Open carry of a deadly weapon is legal. There is no permit requirement, and there is no prohibition against walking around with a large knife visible on your belt or in a sheath.

Concealed carry of a deadly weapon without a license is classified as a Class G felony and is punishable by up to two years’ confinement in a Level V facility.

The standard for what counts as “concealed” was addressed in Robertson v. State (704 A.2d 267, 1997). The Delaware Supreme Court adopted the majority rule in that case, holding that a weapon is concealed when it is hidden from the ordinary sight of another person.

So, if a knife is tucked inside a jacket, clipped inside a waistband, or stored in a bag where it cannot be readily seen, it meets the legal definition of concealed.

Prohibited Knives in Delaware

Even after the 2025 law change, certain knives remain banned.

• Undetectable knives: It is unlawful to engage in commerce involving knives that cannot be detected by standard security screening equipment.

• Knuckles-combination knives: Possession of or dealing in any knife combined with brass knuckles is illegal. This applies across the state.

• Martial arts throwing stars: These are specifically addressed under Delaware’s Safe School and Recreation Zone provisions in §1457 of Title 11.

Owning a knuckle-combination knife is a Class B misdemeanor. If the offense happens within a Safe School Zone, the penalties increase to a fine of up to $2,300 and up to 1 year of confinement.

Penalties at a Glance

The penalties for knife law violations escalate depending on the offense and location.

A Class G felony conviction remains on a criminal record. Penalties for carrying a concealed weapon in a school zone increase to a Class F felony, with up to three years in prison.

The Concealed Deadly Weapons Permit

Delaware issues a Concealed Deadly Weapons permit that covers more than firearms. If you hold this permit, you are legally authorized to carry knives classified as deadly weapons in a concealed manner. That includes fixed-blade knives with blades over 3.75 inches, large folding knives, and any other knife that exceeds the ordinary pocketknife definition.

The permit process involves an application through the state court system, and you should confirm the current requirements with the Prothonotary’s office in the county where you reside. Getting this permit is the only legal path to concealed carry of a deadly weapon, a knife, in Delaware.

Local Ordinances Matter

Delaware does not have statewide preemption for knife laws. This means that cities, towns, and counties are free to pass their own regulations on knives, and those local rules can be stricter than state law.

A knife legal under Title 11 may be prohibited by local ordinances in cities such as Wilmington, Dover, or Newark. Local governments may impose stricter regulations than state law, particularly in urban areas.

What You Can and Cannot Do With a Knife in Delaware

Here is a condensed summary of where things stand under current law:

Legal

• Owning and carrying automatic (switchblade) knives

• Owning and carrying fixed-blade knives of any size

• Open carry of knives classified as deadly weapons

• Concealed carry of deadly weapons, knives with a valid permit

• Carrying any pocketknife with a blade of 3.75 inches or less in a closed position

Illegal

• Concealed carry of a deadly weapon, a knife without a permitPossession of or dealing in knuckle-combination knives

• Commerce involving undetectable knives

• Possessing martial arts throwing stars in Safe School and Recreation Zones

• Using any knife during an assault, which remains a serious criminal offense regardless of the type of knife

Carrying a Knife in Delaware After 2025

Senate Bill 108 repealed a long-standing restriction and updated the legal definition of ordinary pocketknife, increasing the blade limit to 3.75 inches and removing the “folding” requirement.

Still, the core framework of Delaware knife law has not loosened across the board. Concealed carry of a deadly weapon remains a felony. Certain knives are still completely banned. Local governments retain the authority to impose additional restrictions on top of state law.

Carrying a knife in Delaware requires attention to detail. Small differences in blade length or visibility can determine whether a violation is treated as a misdemeanor or felony.