Delaware knife laws let you own and openly carry almost any knife, including switchblades and other automatic knives, which became legal in 2025. The rule that governs everyday carry is a single measurement: a folding knife with a blade of 3.75 inches or less, carried closed, is an “ordinary pocketknife” and needs no permit, concealed or not. Anything larger, or any knife that doesn’t fold, is a “deadly weapon” — legal to carry in plain view, but a felony to conceal without a state-issued permit.
The 3.75-Inch Rule
Delaware’s whole system runs on one distinction in Title 11, Section 222: whether your knife is an “ordinary pocketknife” or a “deadly weapon.” A deadly weapon includes “a knife of any sort, other than an ordinary pocketknife carried in a closed position.”1Delaware Code Online. Delaware Code Title 11 – Crimes and Criminal Procedure An ordinary pocketknife is a folding knife with a blade of 3.75 inches or less, carried closed.
That threshold was 3 inches until 2025, when SB 108 raised it. Blade length is measured across the full metal portion extending from the handle, not just the sharpened edge. A knife that exceeds 3.75 inches, or one that doesn’t fold closed (a fixed-blade hunting or utility knife, for example), is a deadly weapon under the statute regardless of what you plan to use it for.
Landing in the deadly weapon category doesn’t make a knife illegal. It changes how you can carry it and raises the stakes if the knife is ever used in a crime.
Switchblades and Automatic Knives After 2025
Before July 30, 2025, Delaware banned the sale and possession of switchblades and any knife opened by a spring mechanism or gravity. SB 108 repealed that ban by striking Section 1446 from the code.2Delaware General Assembly. Delaware General Assembly – Senate Bill 108 Buying, owning, and openly carrying automatic knives and gravity knives is now legal.
One thing SB 108 did not do: it did not remove switchblades from the Section 222 definition of “deadly weapon.”1Delaware Code Online. Delaware Code Title 11 – Crimes and Criminal Procedure So while owning one is fine, concealing a switchblade without a permit is still a felony under the general concealed-weapon rules.
Open Carry vs. Concealed Carry
This is where people get into trouble. Delaware treats open and concealed carry very differently.
Open carry is legal for every knife the state allows you to own, including deadly weapons. A large fixed-blade knife in a belt sheath, or a machete in a visible scabbard, is fine without any permit. There is no blade-length ceiling for open carry.
Concealed carry without a permit is legal only for ordinary pocketknives — folding knives with blades of 3.75 inches or less, carried closed. Concealing anything else is a class G felony under Section 1442, punishable by up to two years in prison.3Justia. Delaware Code 11-1442 – Carrying a Concealed Deadly Weapon; Class G Felony; Class D Felony A knife inside a jacket, clipped inside a waistband, or stashed in a bag counts as concealed.
Practical version: if your daily knife is a folder under 3.75 inches, carry it however you want. If it’s bigger, fixed-blade, or a switchblade, keep it visible or get a permit.
Getting a Concealed Deadly Weapons Permit
Delaware issues concealed deadly weapons permits through the Superior Court, and the process runs longer than in many states. Under Section 1441, you’ll need to:4Delaware Courts. Concealed Deadly Weapons – Superior Court
- Be at least 18 and of good moral character.
- File a written application with the Prothonotary in your county at least 15 days before the next Superior Court term, including information for a criminal background check.
- Submit a signed certificate from five respectable citizens of your county attesting to your sobriety, character, and need for a concealed weapon.
- Complete a firearms training course certified by a nationally recognized organization or law enforcement agency and file a notarized certificate of completion.
- Pay a $65 fee to the Prothonotary at filing.
- Accept public notice: the Prothonotary publishes your application in a local newspaper at least 10 days before the court term.
Despite the “firearms training” label, the permit itself covers all concealed deadly weapons, knives included. If your permit expires while a renewal is pending, carrying concealed during that gap is a valid defense under the statute.3Justia. Delaware Code 11-1442 – Carrying a Concealed Deadly Weapon; Class G Felony; Class D Felony
Knives That Remain Illegal
Two categories of knives are prohibited outright, no matter how you carry them:
- Undetectable knives — any commercially manufactured knife that can’t be picked up by a metal detector at standard calibration. Possession is a class G felony. Narrow exceptions exist for law enforcement, military sales, and historical museums with proper security.5Justia. Delaware Code 11-1446A – Undetectable Knives; Commercial Manufacture, Import for Commercial Sale, or Offers for Commercial Sale; or Possession
- Knuckles-combination knives — any knife with a blade that opens or releases from a handle designed as brass knuckles. Possession is a class B misdemeanor.6Justia. Delaware Code 11-1452 – Unlawfully Dealing with Knuckles-Combination Knife
Where You Still Can’t Carry: Safe School and Recreation Zones
Even with a legal knife and a valid permit, Delaware’s Safe School and Recreation Zone law under Section 1457 restricts certain places, and the recreation category catches people off guard:
- School buildings, school grounds, and surrounding areas.
- Any recreation center, athletic field, or sports stadium owned or operated by a county, municipality, the state, or a private organization.7FindLaw. Delaware Code Title 11 Crimes and Criminal Procedure 1457
A community softball field, a county-run gym, or a privately operated sports stadium all qualify. Inside these zones, possessing a deadly weapon knife bumps the underlying offense up by one grade — an unclassified misdemeanor becomes a class B misdemeanor, a class B becomes a class A, and felonies climb one class as well.
Even smaller folding knives can trigger the zone rules if they’ve been modified with features like serrated edges, locking blades, or spring-assisted opening mechanisms designed to inflict serious injury.8Delaware General Assembly. Delaware Code 11 1457A – Unlawful Possession or Dealing with a Deadly Weapon or Dangerous Instrument in a Safe School Zone
Penalties
The jump from misdemeanor to felony happens quickly under Delaware’s knife statutes:
- Possessing an undetectable knife: class G felony, up to two years in prison.5Justia. Delaware Code 11-1446A – Undetectable Knives; Commercial Manufacture, Import for Commercial Sale, or Offers for Commercial Sale; or Possession
- Possessing a knuckles-combination knife: class B misdemeanor, up to six months in jail and a fine up to $1,150.6Justia. Delaware Code 11-1452 – Unlawfully Dealing with Knuckles-Combination Knife
- Carrying a concealed deadly weapon without a permit: class G felony, up to two years in prison.3Justia. Delaware Code 11-1442 – Carrying a Concealed Deadly Weapon; Class G Felony; Class D Felony
- Possessing a prohibited knife in a Safe School or Recreation Zone: one grade above the base offense.7FindLaw. Delaware Code Title 11 Crimes and Criminal Procedure 1457
Using any deadly weapon knife during a robbery, assault, or other violent crime adds the deadly-weapon element to the underlying charge, which can push it into a higher felony class. The knife doesn’t need to cause injury; having it present and accessible during the crime is enough.
Local Ordinances Can Be Stricter
Delaware has no statewide preemption law for knives. Cities and counties can pass their own ordinances that go further than state law, so a knife that’s legal under Title 11 could still violate a municipal rule. Before carrying in an unfamiliar area, especially in larger cities like Wilmington or Dover, checking the local code is worth the time.