Arizona has broad knife preemption and generally permissive ownership rules, but the carry rules are not simply “everything is legal at age 18.” The statute distinguishes pocket knives from other deadly weapons and sets an important concealed-carry threshold at age 21.
Arizona generally permits common pocket knives, fixed blades, automatic knives, OTF knives, and balisongs. A person age 21 or older may generally carry a lawful knife openly or concealed, but criminal conduct, prohibited possessors, schools, polling places, public establishments and events, generating stations, federal facilities, and private-property rules still matter. A person under 21 may not generally conceal a deadly weapon other than a pocket knife.
How does Arizona classify knives?
Arizona defines a “deadly weapon” as anything designed for lethal use. A “dangerous instrument” is an item that, under the circumstances in which it is used, attempted to be used, or threatened to be used, is readily capable of causing death or serious physical injury. [1]
The prohibited-weapon list in § 13-3101 focuses on explosives, suppressors, automatic firearms, certain short firearms, and similar devices. It does not list ordinary switchblades, gravity knives, balisongs, or fixed-blade knives as prohibited weapons. [2]
Arizona’s carry statute uses the term “pocket knife” but does not provide a simple blade-length definition. Do not assume that any folding knife, regardless of design and size, automatically qualifies.
Which knives can adults own?
Arizona does not impose a general state ban on ordinary manual folders, fixed blades, switchblades, spring-assisted knives, OTF knives, gravity knives, or butterfly knives merely because of their opening mechanism. There is no general state knife registry, permit, or maximum blade length for ownership.
Possession can still be unlawful for a prohibited possessor if the knife qualifies as a deadly weapon, and criminal use or prohibited locations can change the result. Retailer age policies and federal shipping rules may also be stricter than state ownership law.
What are the open-carry and concealed-carry rules?
Arizona Revised Statutes § 13-3102 prohibits carrying a deadly weapon other than a pocket knife concealed on the person or within immediate control in a vehicle when the person is under 21, subject to stated exceptions. It also prohibits concealed deadly-weapon carry in furtherance of a serious offense, violent crime, or felony, and requires an accurate answer if an officer asks about a concealed deadly weapon during a qualifying law-enforcement contact. [3]
For a person age 21 or older who is not otherwise prohibited, Arizona generally does not require a permit to carry a lawful knife openly or concealed. The pocket-knife exception is especially important for a person under 21.
Practical takeaway: a restrained everyday pocketknife is the clearest concealed-carry category for a person under 21. A larger fixed blade, dagger, or purpose-built weapon should not be concealed by someone under 21 without Arizona-specific legal advice.
How does vehicle carry work?
Section 13-3102 treats a deadly weapon concealed within a person’s immediate control in a means of transportation similarly to one concealed on the person. For a person under 21, the pocket-knife exception remains relevant. The statute also contains firearm-specific vehicle exceptions that should not be casually extended to every knife. [3]
For lower-risk transport, keep a knife closed or sheathed and secured against movement. A person under 21 should avoid keeping a non-pocket-knife deadly weapon concealed within immediate control. Crossing into another state can change the rule immediately.
What restrictions apply at schools?
Section 13-3102(A)(12) prohibits possessing a deadly weapon on school grounds, subject to limited statutory exceptions. For this section, “school” means a public or nonpublic kindergarten program, common school, or high school, and “school grounds” means in or on the grounds of a school. [3]
The statute includes an exception for a weapon used in preparing for, conducting, or participating in hunter or firearm safety courses. School policies can be broader than the criminal statute. Do not bring a knife to a school without clear authorization for a specific lawful program.
What rules apply at public establishments and public events?
A person may not enter a public establishment or attend a public event carrying a deadly weapon after a reasonable request by the operator or sponsor to remove it and place it in temporary secure storage. Arizona requires the operator or sponsor to provide readily accessible temporary storage and allow immediate retrieval on exit, with an exception for certain liquor-licensed premises. [4]
For this rule, a public establishment is a structure, vehicle, or craft owned, leased, or operated by the state or a political subdivision. A public event is a specifically named or sponsored event of limited duration conducted by a public entity or under a public permit or license.
What other restricted locations matter?
Section 13-3102 separately addresses deadly weapons at election polling places on election day and at nuclear or hydroelectric generating stations. Federal courthouses, federal buildings, and secured airport areas are governed by federal rules. [3]
Private property owners and event operators may also set access or conduct policies. A posted sign is not the only way a property owner can communicate a rule; refusing a request to remove the item or leave can create trespass exposure.
Does Arizona preempt local knife ordinances?
Yes. Arizona has a knife-specific preemption statute. Section 13-3120 generally bars political subdivisions from enacting ordinances or rules relating to transportation, possession, carrying, sale, transfer, purchase, gift, devise, licensing, registration, or use of knives. More restrictive local knife rules are declared null and void. [5]
The statute allows rules that implement state law, generally applicable taxes, and regulation of a political subdivision’s own employees or contractors acting within the scope of work. Statewide preemption also does not erase state location restrictions, federal law, or private-property policies.
Are there general age restrictions?
The key statewide age rule is not a blanket “under 18 cannot possess a knife” rule. Instead, § 13-3102(A)(2) restricts a person under 21 from carrying a deadly weapon other than a pocket knife concealed on the person or within immediate control in a vehicle, subject to stated exceptions. [3]
Retailers may impose their own minimum age, and minors remain subject to school, parental, employment, and activity rules. A parent should supervise use and verify the exact carry situation.
What federal travel rules apply?
The Transportation Security Administration prohibits knives in carry-on baggage except for plastic or round-bladed butter knives; checked-baggage and airline requirements still apply. [6]
Federal rules also apply on federal property and can be more restrictive than Arizona law. Interstate travelers must verify the destination and every jurisdiction where they will leave the vehicle or carry the knife.
What should you verify before carrying?
- Whether the knife is an ordinary pocket knife or is designed for lethal use.
- The carrier’s age, especially for concealed carry under age 21.
- Whether the carry is connected to a crime or threatening conduct.
- Whether the destination is a school, polling place, public establishment, public event, generating station, federal facility, workplace, or private venue.
- Whether a later statutory amendment or court decision changes the interpretation.
Conclusion
Arizona broadly protects lawful knife ownership and creates uniform statewide rules through knife-specific preemption. The most important carry distinctions involve whether the item is a pocket knife or deadly weapon, whether the carrier is under 21, and whether the destination is restricted.
Last reviewed: August 24, 2026.
This article provides general information, not legal advice. Knife laws and their interpretation can change and may depend on knife design, age, carry method, location, and use. Verify current law through official sources or consult a qualified Arizona attorney about a specific situation.
Sources & References
- [1] Arizona Revised Statutes § 13-105. Definitions of deadly weapon and dangerous instrument.
- [2] Arizona Revised Statutes § 13-3101. Weapons definitions and prohibited-weapon list.
- [3] Arizona Revised Statutes § 13-3102. Concealed carry, under-21 rule, prohibited possessors, schools, polling places, public establishments, and other location restrictions.
- [4] Arizona Revised Statutes § 13-3102.01. Temporary secure storage at public establishments and public events.
- [5] Arizona Revised Statutes § 13-3120. Knife-specific statewide preemption.
- [6] Transportation Security Administration — Knives. Federal carry-on and checked-baggage guidance.
