If you carry a pocketknife to work, keep a fixed-blade knife in your truck, or just bought an automatic knife and want to know whether you can actually use it, ohio knife laws are probably simpler than you expect — but only since 2021. Before that year, Ohio’s rules were a trap for ordinary people: a knife carried in a pocket could be treated as a concealed deadly weapon, and whole categories of knives could not legally be made or sold in the state even though owning them was not banned. A reform bill changed both of those things. This guide explains the current rules in plain language: what changed in 2021, which knives are legal to own and carry, how open and concealed carry work, and the places where knives are still restricted.
Ohio Knife Laws at a Glance
Here is the short version, with the details in the sections that follow:
- Most knives are legal to own in Ohio, including folding knives, fixed-blade knives, and automatic knives such as switchblades.
- Concealed carry of a knife is allowed under state law as long as the knife is not used as a weapon, thanks to a specific carve-out in the carrying concealed weapons statute.
- No knife carry permit exists or is required under the state statutes covered in this guide, and the state carry statute sets no blade-length limit.
- One category is different: a ballistic knife — a knife with a detachable blade propelled by a spring-operated mechanism — is classified as dangerous ordnance under Ohio law, a far more restricted category.
- Some places are still off-limits, most importantly school safety zones and courthouses, and property owners and employers can set their own rules on their premises.
What Changed in 2021: Senate Bill 140
Almost everything people find confusing about Ohio knife law traces back to one bill. Senate Bill 140 of the 133rd General Assembly took effect on April 12, 2021, and it made two separate changes that are worth understanding individually, because older articles and forum posts still describe the law as it stood before that date.
The manufacture and sale ban was repealed
Before Senate Bill 140, Ohio Revised Code Section 2923.20 made it an unlawful transaction in weapons to manufacture, possess for sale, sell, or furnish to anyone other than a law enforcement agency a list of items that included switchblade knives, springblade knives, and gravity knives. The odd result was that Ohioans could legally own these knives but could not legally buy them from an Ohio seller, and Ohio makers could not legally manufacture them. The Legislative Service Commission’s final analysis of the bill confirms that Senate Bill 140 eliminated that prohibition. The same repeal also covered the other non-firearm items on that list, such as brass knuckles and blackjacks, as far as manufacturing and selling went.
A knife not used as a weapon is not a “deadly weapon” for concealed carry
The second change fixed the bigger everyday problem. Ohio’s carrying concealed weapons statute, Section 2923.12, bans knowingly carrying a concealed deadly weapon other than a handgun. Before 2021, whether an ordinary pocketknife counted as a deadly weapon was uncomfortably vague, and people were charged over tools they used for work. Senate Bill 140 added division (H) to Section 2923.12, which states, in the part that matters here: for purposes of this section, “deadly weapon” or “weapon” does not include any knife, razor, or cutting instrument if the instrument was not used as a weapon. In plain terms, carrying a knife in your pocket, bag, or waistband is not the concealed-weapons offense under state law simply because the knife is hidden — the legal problem starts when a knife is used as a weapon.
The Definition That Still Matters
It helps to understand why the wording of the 2021 fix is narrow. Ohio’s general weapons definitions live in Ohio Revised Code Section 2923.11. There, a “deadly weapon” means any instrument, device, or thing capable of inflicting death, and designed or specially adapted for use as a weapon, or possessed, carried, or used as a weapon. That general definition still exists, and it still applies in other parts of Ohio weapons law.
The knife carve-out from Senate Bill 140 was written into the concealed-carry section specifically — it says “for purposes of this section.” So the safe way to think about Ohio law is in two layers. For the everyday question “can I carry this knife, openly or concealed?” the 2021 carve-out gives a clear, permissive answer for knives not used as weapons. For other legal questions — especially the rules for sensitive places discussed below, which are written around the general definition of a deadly weapon — do not assume the carve-out travels with you. A knife that is designed as a weapon, or that someone carries or uses as one, can still meet the general definition.
Which Knives Are Legal to Own and Carry?
Working through the common categories, using the statutes above:
- Pocketknives and folding knives: legal to own and carry, openly or concealed, in ordinary circumstances. This is the everyday case the 2021 reform was aimed at.
- Fixed-blade knives, including hunting and kitchen knives: legal to own and carry. Transporting them sensibly — sheathed, in a toolbox, tackle box, or hunting pack — matches how the law expects tools to be treated, and context matters if a knife is ever questioned.
- Automatic knives, switchblades, springblade knives, and gravity knives: the old manufacture-and-sale ban was repealed in 2021, and possession was not banned before that either. These knives now sit in the same general position as other knives for ownership and carry.
- Ballistic knives: the exception. Section 2923.11 defines a ballistic knife as a knife with a detachable blade that is propelled by a spring-operated mechanism, and lists ballistic knives among “dangerous ordnance” — the same restricted category as items like sawed-off firearms and explosive devices. Dangerous ordnance is subject to separate, much stricter possession rules, so treat ballistic knives as prohibited for ordinary ownership purposes and do not confuse them with ordinary automatic knives, which merely open a folding blade.
One caution applies to every category: legality of the knife itself is not the whole analysis. Using any knife to threaten or injure someone is prosecuted under the general criminal laws on assault and related offenses, and the moment a knife is used as a weapon it loses the protection of the 2021 concealed-carry carve-out as well. Ohio’s rules on when force may be used in self-defense are a separate subject, covered in our guide to Ohio’s stand-your-ground law.
Open Carry vs. Concealed Carry
Because of the way the 2021 reform was written, Ohio does not draw the sharp open-versus-concealed line for knives that it once did, and that some other states still do. Open carry of a knife — on a belt, in a visible sheath, or clipped to a pocket — was broadly permitted before 2021 and remains so. Concealed carry is where the law changed: since April 12, 2021, a knife, razor, or cutting instrument that is not used as a weapon is excluded from the definition of a deadly weapon for the concealed-carry statute, so carrying one concealed is not that offense.
There is also no state knife license or permit to apply for, and you will not find a blade-length limit in Section 2923.12 — pre-2021 advice about keeping blades under an arbitrary length reflects the old vagueness, not a number in the current statute. That said, common sense still applies. A large fixed-blade knife worn openly in a crowded place may be perfectly lawful and still draw police attention, questions, and requests to leave private property. Lawful carriers generally keep knives sheathed, avoid handling them unnecessarily in public, and comply calmly if an officer asks about a knife during a stop.
Where Knives Are Still Restricted
Statewide carry freedom has real limits. The most important restricted places are written into the Revised Code using the general definition of a deadly weapon:
- School safety zones. Section 2923.122 makes it an offense to knowingly convey or possess a deadly weapon or dangerous ordnance in a school safety zone, with exceptions mainly for law enforcement, authorized security, and people with specific written authorization from the school’s governing body who meet the statute’s training conditions. Schools also enforce their own student and visitor rules, which typically ban knives outright. The practical rule is simple: do not bring a knife onto school property unless you are clearly within an exception.
- Courthouses. Section 2923.123 similarly bans knowingly conveying or possessing a deadly weapon or dangerous ordnance in a courthouse or a building containing a courtroom, again with exceptions for officials such as judges and law enforcement acting in their duties. Expect screening at the door, and expect a pocketknife to be turned away even if no charge follows.
- Other controlled spaces. Government buildings, airports and other federally controlled facilities, and secure venues operate under their own federal rules, screening practices, or conditions of entry. Private businesses, employers, landlords, and event venues can also prohibit knives on their property as a condition of entry or employment, and being asked to leave is something to comply with first and question later.
Notice the pattern: the 2021 carve-out answers the concealed-carry question on the street. It is not a pass to carry a knife everywhere, and the sections on schools and courthouses were not rewritten to include it.
What About City and County Ordinances?
Older Ohio knife guides warn, correctly for their time, that cities could impose knife rules stricter than state law because Ohio had no knife preemption. That picture has changed too. Ohio’s uniformity statute, Section 9.68, now expressly includes knives: it declares a need for uniform state laws on the ownership, possession, carrying, sale, and manufacture of firearms and knives, states that political subdivisions may not impose further licensing, permission, restrictions, or process beyond what state and federal law provide, and gives people adversely affected by a conflicting local ordinance a right to sue the subdivision. Knives were added to that statute by Senate Bill 156, effective September 13, 2022, and the current text was updated again in 2025.
Two practical qualifications remain. First, the statute preserves certain zoning ordinances about where and when commercial sales may occur, so retail-sale zoning can still vary. Second, preemption governs government rules — it does not stop a private employer, business, school, or property owner from setting conditions on their own premises, and it does not override the school and courthouse statutes above. If you find an old city knife ordinance quoted online, check its date before treating it as current law.
Practical Rules for Carrying a Knife in Ohio
- Carry knives as tools: sheathed or folded, put away, and not in your hand in public without a reason.
- Never use or display a knife to threaten someone — that is the fact pattern that turns a lawful tool into a deadly weapon in the eyes of the law.
- Leave knives in the car or at home for schools, courthouses, and other screened or secure buildings.
- Respect private-property and workplace rules even when state law allows carry.
- When traveling, check the law of your destination — Ohio’s reform does not follow you across state lines, and other states regulate automatic knives and concealed carry very differently.
- If you are charged over a knife, talk to an Ohio criminal defense attorney promptly; how a knife was possessed, carried, or used is exactly what these statutes turn on.
The Bottom Line
Ohio knife laws today are permissive by design. Since April 12, 2021, a knife that is not used as a weapon is not a deadly weapon for the state’s concealed-carry statute, and the old ban on making and selling switchblade, springblade, and gravity knives is gone. Most common knives can be owned and carried, openly or concealed, without any permit, and state preemption now limits stricter local rules. The hard edges are specific: ballistic knives sit in the dangerous ordnance category, schools and courthouses remain restricted places, and any knife used as a weapon is treated as one. Carry a knife like the tool it is, and Ohio law largely leaves you alone.
This article summarizes Ohio law for general information only and is not legal advice. Knife cases are fact-specific; if you have been charged or are unsure whether a particular knife or place is covered, consult an Ohio attorney about your situation.
