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Maryland Knife Laws 2026: What You Can Own, Carry, and Buy
Last reviewed and updated July 29, 2026
Maryland knife laws draw an important distinction between a non-switchblade folding “penknife” and knives treated as weapons, including switchblades, dirks, and Bowie knives.
Under the main statewide carry law, a penknife without a switchblade is excluded from the statutory definition of a weapon. Concealed carry of other dangerous weapons is generally prohibited, while openly carrying a weapon is prohibited when done with the intent or purpose of unlawfully injuring someone.
Maryland also prohibits the sale, display, or offer for sale of switchblades and shooting knives. Knives are broadly prohibited on public K–12 school property, and local ordinances can be stricter. Baltimore City, for example, prohibits the sale, carry, or possession of switchblades.
Legal notice: This article provides general educational information, not legal advice. Knife classification and carry questions can depend on the knife, location, and circumstances. Check current state and local law or consult a Maryland attorney before carrying or transferring a knife.
Maryland Knife Laws at a Glance
| Question | General Statewide Rule | Important Limits |
|---|---|---|
| Can you carry a non-switchblade folding penknife? | It is excluded from the definition of “weapon” in § 4-101. | School-property rules, local ordinances, and unlawful use still apply. |
| Can you conceal a switchblade, dirk, or Bowie knife? | Generally no. These are listed as weapons, and concealed carry of a dangerous weapon is prohibited. | Section 4-101 contains narrow exceptions, but they do not automatically override other laws. |
| Can you openly carry a listed weapon? | State law does not create a blanket open-carry ban. | Open carry is prohibited when accompanied by an intent or purpose to injure someone unlawfully. |
| Is there a statewide blade-length limit? | The main statewide carry statute does not set a general maximum blade length. | Local laws may use blade length for particular restrictions. |
| Can a switchblade be sold in Maryland? | No. State law prohibits sale, barter, display, or an offer to sell or barter a switchblade or shooting knife. | Baltimore City also prohibits switchblade possession and carry. |
| Can you bring a knife onto public school property? | Generally no. Section 4-102 covers any firearm, knife, or deadly weapon on public school property. | Only the limited statutory exceptions apply. |
This table summarizes state law only. Always check the city or county where you will possess, carry, or transfer the knife.
What Counts as a “Penknife” in Maryland?
Maryland Criminal Law § 4-101 says that “weapon” includes a dirk knife, Bowie knife, switchblade knife, star knife, sandclub, metal knuckles, razor, and nunchaku.
The same section expressly excludes “a penknife without a switchblade.”
The statute does not define “penknife,” so Maryland case law matters. In Thornton v. State, the Appellate Court of Maryland explained that modern penknives encompass knives with blades that fold into the handle. The court held that the folding knife in that case qualified as a penknife regardless of blade length.
The court also explained that the State had to prove that the knife fell outside the penknife exception. Read the official Maryland Courts opinion.
The practical point is that a conventional, non-automatic folding knife receives different treatment under § 4-101 from a switchblade, dirk, Bowie knife, or another dangerous weapon. However, this does not make every folding knife lawful in every location or circumstance.
Is There a Legal Knife Blade Length in Maryland?
Maryland’s primary statewide knife-carry statute does not establish a general maximum blade length.
In Thornton v. State, the court treated the knife’s folding design—not blade length alone—as central to the penknife analysis.
This does not mean blade length never matters. Local ordinances may impose different restrictions.
For example, Baltimore City Code § 59-23 includes a knife with a blade longer than three inches in its definition of a “dangerous knife” for restrictions involving transfers to people under 21 and commercial displays.
Therefore, the common claim that “any knife under three inches is legal in Maryland” is misleading. Knife type, opening mechanism, carry method, location, and intent can all matter.
Concealed Carry of Knives in Maryland
Under § 4-101(c)(1), a person may not wear or carry a dangerous weapon concealed on or about the person.
Because § 4-101 expressly excludes a non-switchblade penknife from its definition of “weapon,” that specific concealed-weapon prohibition generally does not apply to a conventional non-automatic folding penknife.
By contrast, the statute expressly lists switchblades, dirks, and Bowie knives as weapons. Concealing one of these knives can violate § 4-101 unless a statutory exception applies.
Whether a knife is considered concealed can depend on the facts. Do not assume that a visible pocket clip, storage inside a bag, or placement inside a vehicle automatically makes the carry lawful. Local ordinances and rules for restricted properties may also apply.
Open Carry of Knives in Maryland
Section 4-101(c)(2) prohibits openly wearing or carrying a dangerous weapon when the person has the intent or purpose of injuring someone unlawfully.
The statute does not impose a blanket statewide ban on openly carrying every listed knife. However, the carrier’s intent and the surrounding circumstances matter.
Maryland law also contains a fact-specific exception for a person carrying a weapon as a reasonable precaution against an apprehended danger. A court has the right to decide whether the precaution and the occasion for carrying the weapon were reasonable.
For that reason, carrying a knife with a general intention of using it for self-defense does not guarantee that the exception will apply.
Are Switchblades Legal in Maryland?
There is no single yes-or-no answer because Maryland regulates possession, carry, and sale differently.
Sale and Display
Maryland Criminal Law § 4-105 prohibits selling, bartering, displaying, or offering to sell or barter:
- A knife or penknife with a blade that opens automatically through pressure applied to a button, spring, or other device in the handle.
- A shooting knife designed to propel a blade from a metal sheath using a high-compression ejector spring.
This means Maryland businesses and individuals should not offer switchblades or shooting knives for sale or barter.
Concealed Carry
A switchblade is expressly listed as a weapon under § 4-101. Its concealed carry is therefore generally prohibited unless a specific statutory exception applies.
Open Carry
The statewide statute prohibits openly carrying a dangerous weapon when accompanied by an intent or purpose to injure someone unlawfully.
Baltimore City
Baltimore City has a stricter rule. Baltimore City Code § 59-22 prohibits the sale, carry, or possession of any knife with an automatic spring or another device for opening or closing the blade, commonly known as a switchblade.
For an explanation of automatic-opening mechanisms, see What Is a Switchblade?
What About Gravity Knives and Butterfly Knives?
Maryland Criminal Law § 4-101 does not separately name or define gravity knives or butterfly knives.
That absence should not be interpreted as a guarantee that either type of knife is lawful to conceal or carry. A knife may still be analyzed under the broader “dangerous weapon” language, and local ordinances may specifically regulate it.
Baltimore City, for example, includes a gravity knife in its “dangerous knife” definition for the transfer and commercial-display restrictions in § 59-23.
When a knife does not fit clearly within the statutory penknife exception, obtain advice based on the knife’s specific design and the location where it will be possessed or carried.
Knives on Public School Property
Maryland Criminal Law § 4-102 generally prohibits carrying or possessing a firearm, knife, or deadly weapon of any kind on public school property.
This rule is broader than the penknife exception found in § 4-101.
The statute provides limited exceptions, including:
- Law-enforcement officers acting in the regular course of duty.
- Certain qualified off-duty or retired law-enforcement officers.
- A person hired by a county board of education to guard school property.
- A person participating in an organized shooting activity for educational purposes.
- A person participating in a historical demonstration with a written invitation from the school principal.
Do not assume that an ordinary pocket knife or folding penknife is permitted on public school property.
Maryland Knife Rules for Minors
Section 4-101 contains an additional nighttime restriction for minors in the following counties:
- Anne Arundel County
- Baltimore County
- Caroline County
- Cecil County
- Harford County
- Kent County
- Montgomery County
- Prince George’s County
- St. Mary’s County
- Talbot County
- Washington County
- Worcester County
In these counties, a minor may not carry a dangerous weapon from one hour after sunset until one hour before sunrise, whether the weapon is concealed or openly carried.
The statute provides exceptions when the minor is:
- On a bona fide hunting trip.
- Participating in or traveling to or from a bona fide trap shoot.
- Participating in a sport-shooting event.
- Participating in an organized civic or military activity.
Because a non-switchblade penknife is excluded from § 4-101’s definition of a weapon, it is not covered by that particular dangerous-weapon provision.
However, it would be too broad to say that a minor may always carry a manual folding knife. School-property rules, Baltimore City provisions, other local ordinances, and the circumstances of possession may produce a different result.
Does a Maryland Handgun Permit Change the Knife Rules?
Section 4-101(b)(3) provides an exception for a holder of a Maryland handgun carry permit.
This should be treated as a limited exception to § 4-101—not as a universal knife permit.
A handgun permit does not eliminate the public-school prohibition in § 4-102 and does not automatically override Baltimore City or other local restrictions.
Local Knife Ordinances Can Be Stricter
Maryland state law is only the starting point.
Baltimore City demonstrates why a statewide summary cannot answer every local knife-law question. The city prohibits switchblade possession and carry and separately regulates transfers and commercial displays of dangerous knives.
Before carrying a knife, check the current code for both the city and county where you will be located—not only the jurisdiction where you live.
Penalties Under Maryland Knife Laws
Violations of § 4-101
A violation is a misdemeanor punishable by:
- Up to three years of imprisonment.
- A fine of up to $1,000.
- Both imprisonment and a fine.
If the evidence shows that the weapon was carried with the deliberate purpose of injuring or killing another person, the statute directs the court to impose the highest prescribed imprisonment sentence.
Knives on Public School Property
A violation of § 4-102 is generally a misdemeanor punishable by up to three years of imprisonment, a fine of up to $1,000, or both.
Switchblade and Shooting-Knife Sales
A violation of § 4-105 is a misdemeanor punishable by up to 12 months of imprisonment, a fine of between $50 and $500, or both.
Baltimore City Switchblade Violations
A violation of Baltimore City’s switchblade ordinance is punishable by up to 12 months of imprisonment, a fine of up to $1,000, or both.
Frequently Asked Questions
Can I carry a pocket knife in Maryland?
A conventional non-switchblade folding penknife is excluded from the definition of “weapon” in § 4-101. However, public-school restrictions, local ordinances, and laws concerning unlawful use still apply.
Can I conceal a fixed-blade knife in Maryland?
Do not assume so. Section 4-101 prohibits concealed carry of a dangerous weapon and expressly includes dirk and Bowie knives. The treatment of another fixed-blade design may depend on the knife and the surrounding circumstances.
Are automatic knives legal in Maryland?
Maryland prohibits selling, displaying, or offering automatic switchblades for sale under § 4-105. Switchblades are also listed weapons for carry purposes under § 4-101. Baltimore City additionally prohibits their possession and carry.
Is a knife under three inches always legal in Maryland?
No. Maryland’s main statewide carry rule is not a simple three-inch rule. Knife type, opening mechanism, carry method, intent, location, and local ordinances can all affect legality.
Can I carry a knife for self-defense?
Do not rely on a blanket yes. Section 4-101 contains a fact-specific exception for carrying a weapon as a reasonable precaution against an apprehended danger. A court decides whether the precaution and the occasion were reasonable.
Can I carry a knife in my vehicle?
Vehicle storage can still raise questions about concealment, accessibility, knife classification, and local law. Do not assume that placing a knife in a glove compartment, console, bag, or under a seat automatically makes it legal.
Can I carry a knife in Baltimore City?
Baltimore City has stricter rules than the statewide baseline. Switchblade sale, carry, and possession are prohibited. The city also imposes additional transfer and display rules for dangerous knives.
Bottom Line
- Non-switchblade folding penknives receive a specific exception under the main statewide carry statute.
- Concealed carry of dangerous weapons is generally prohibited.
- Selling or displaying switchblades and shooting knives for sale is prohibited.
- Carrying or possessing any knife on public school property is generally prohibited.
Local laws—especially Baltimore City’s—may be stricter than the statewide rules.
If you are choosing a conventional everyday tool, review your local laws first and then explore manual folding pocket knives. Never purchase, carry, or use a knife in violation of applicable law.
Official Legal Sources
Baltimore City Code § 59-23 — Dangerous-Knife Transfers and Displays
Maryland Criminal Law § 4-101 — Dangerous Weapons
Maryland Criminal Law § 4-102 — Weapons on Public School Property
Maryland Criminal Law § 4-105 — Switchblade and Shooting-Knife Sales