Idaho Pepper Spray and Stun Gun Laws (2026)

Idaho's concealed-weapons statute writes both pepper spray and a stun gun out of its own definition of "deadly weapon" by name, and that exclusion governs most of Idaho's weapons chapter. But two K-12 school-related sections define "deadly or dangerous weapon" their own way, borrowing a federal capability test that does not name or exclude either device, so whether they reach pepper spray or a stun gun on K-12 school property is a further question those sections' own text does not answer; neither section reaches a college or university.

Jurisdiction scope: This page covers Idaho state law only, principally Idaho Code Sections 18-3302, 18-3302A, 18-3302D, 18-3302E, 18-3302I, 18-3302J, 18-3324, and 18-3327. It does not cover Idaho's concealed weapons license statute in detail as it applies to firearms and knives, which is a separate licensing scheme from the one described here.

Is pepper spray legal to carry in Idaho?

Yes, across most of Idaho's weapons chapter, though two K-12 school-related sections use a different, broader definition that raises an open question on school property; see the school-property section below. Idaho Code Section 18-3302 governs concealed carry of a "deadly weapon," and subsection (2)(c) lists what that term does not include: "(i) Any knife, cleaver or other instrument that is intended by the person to be used in the processing, preparation or eating of food; (ii) Any knife with a blade six (6) inches or less; or (iii) Any taser, stun-gun, pepper spray or mace." Section 18-3302(2) opens "As used in this chapter," so this exclusion governs every section of Chapter 33 that relies on the undefined term "deadly weapon" rather than writing its own definition, including the concealed-carry license requirement itself, Section 18-3302C's courthouse/jail/certain-locations ban, and Section 18-3303's exhibition-or-use offense.

Idaho's chemical-weapons statute, Section 18-3324, separately confirms this for pepper spray. That section makes it a felony, punishable by up to life imprisonment or a fine of up to $50,000, to develop, produce, stockpile, or use a "chemical weapon," a term defined around toxic chemicals and munitions designed to cause mass harm. Subsection (4) states plainly: "Nothing in this section shall be construed to prohibit the possession or use of any individual self-defense device, including devices which contain pepper spray or chemical mace." Idaho Code Section 18-3302A limits the sale-to-minors offense to "any dirk, dirk knife, bowie knife, dagger, pistol, revolver or gun," and Section 18-3302E's minor-possession offense adopts that same definition, so neither reaches pepper spray; Idaho's weapons chapter sets no age minimum, capacity or formula limit, or purchase restriction for it.

Is a stun gun legal to carry in Idaho?

Yes, under the same statutory exclusion, and subject to the same K-12 school-property open question described below. Idaho Code Section 18-3302(2)(c)(iii) excludes "any taser, stun-gun" from the "deadly weapon" definition alongside pepper spray and mace, so a stun gun or taser does not require a concealed weapons license to carry, openly or concealed, and is not swept into any other Chapter 33 offense that relies on the undefined "deadly weapon" term. This exclusion is unchanged in the version of Section 18-3302 that takes effect January 1, 2027, so it is a stable feature of Idaho law rather than one scheduled to change. Section 18-3302A's and Section 18-3302E's sale-to-minors and minor-possession offenses are limited to "any dirk, dirk knife, bowie knife, dagger, pistol, revolver or gun," so Idaho's weapons chapter sets no age minimum, license, or purchase restriction specific to stun guns either.

Idaho school property: an open question, K-12 only

Two sections write their own definition of "deadly or dangerous weapon" instead of relying on Section 18-3302's exclusion, and both apply only to a K-12 school, not to a college, university, community college, or technical school. Section 18-3302D makes it "unlawful and is a misdemeanor for any person to possess a firearm or other deadly or dangerous weapon while on the property of a school" or in school-used portions of a building, stadium, or other structure, or while riding school-provided transportation, and it extends to students attending any school-sponsored activity regardless of location. Section 18-3302D(2)(e) defines "school" for this section as "a private or public elementary or secondary school," so the offense does not reach an Idaho college or university campus.

Section 18-3302D(2)(a) defines "deadly or dangerous weapon" for this section as "any weapon as defined in 18 U.S.C. 930," the federal statute discussed below, not Section 18-3302's narrower list. Section 930's own "dangerous weapon" definition is an affirmative capability test, not an exclusion list: it reaches "a weapon, device, instrument, material, or substance ... that is used for, or is readily capable of, causing death or serious bodily injury," with only a pocketknife carve-out, and it names neither pepper spray nor a stun gun. Whether a compact self-defense spray or a stun gun is "readily capable of" causing serious bodily injury is a question of fact this federal test does not answer, so Section 18-3302D's own text does not itself say whether it bars either device on K-12 school property, only that it borrows a definition that neither names nor excludes them.

Section 18-3302D(4) lists several exceptions, on an expressly non-exhaustive basis: a peace officer; a qualified retired law enforcement officer licensed under Section 18-3302H; a person lawfully possessing the item as part of a program, event, activity, or other circumstance approved by the school's board of trustees or governing board; a person complying with Section 19-202A; an adult over 18 who is not enrolled and keeps the item secured and locked in a vehicle in an unobtrusive, nonthreatening manner; and a person who lawfully possesses the item in a private vehicle while delivering minor children, students, or school employees to and from school or a school activity. Violating Section 18-3302D is punishable by up to a year in jail, a fine of up to $1,000, or both.

Section 18-3302I separately makes it a misdemeanor to willfully threaten, by word, electronic means, or act, to use a firearm or other deadly or dangerous weapon to do violence to a person on school grounds or to disrupt a school's normal operations, and a felony to knowingly possess, make, alter, or repair one in furtherance of such a threat. Its own definition, Section 18-3302I(2)(a), is "a weapon, device, instrument, material or substance that is used for, or is readily capable of, causing death or serious bodily injury," the same affirmative capability test rather than an exclusion list, so it likewise does not name or exclude pepper spray or a stun gun, and whether either meets that test is a further question the statute's text does not answer. Section 18-3302I(2)(b) limits "on school grounds" to "property owned or operated by a school district, public charter school or private school," the same K-12 limit as Section 18-3302D.

Local ordinances

Idaho has two statutes that occupy the field of weapons regulation at the state level, and neither reaches pepper spray or a stun gun. Section 18-3302J, "Preemption of firearms regulation," declares it "the legislature's intent to wholly occupy the field of firearms regulation within this state" and bars a county, city, agency, board, or other political subdivision from regulating "the sale, acquisition, transfer, ownership, possession, transportation, carrying or storage of firearms or any element relating to firearms and components thereof, including ammunition," subject to narrow exceptions for county and city discharge ordinances. Section 18-3327, "Consistency in Knife Regulation," added in 2024, applies only to "a knife or knife making components." Because Idaho's occupied field covers only firearms and knives, nothing in state law bars a city or county from separately regulating pepper spray or stun guns.

Federal law: what it does and does not reach

No federal statute regulates a civilian's purchase or possession of pepper spray or a stun gun. Federal law matters in three places.

Federal buildings. Under 18 U.S.C. § 930(a), whoever knowingly possesses or causes to be present "a firearm or other dangerous weapon in a Federal facility (other than a Federal court facility)" faces a fine, imprisonment of up to 1 year, or both. Subsection (e) sets up to 2 years for a federal court facility, and subsection (b) up to 5 years where the weapon is intended to be used in a crime. Section 930(g)(2) defines the term:

The term "dangerous weapon" means a weapon, device, instrument, material, or substance, animate or inanimate, that is used for, or is readily capable of, causing death or serious bodily injury, except that such term does not include a pocket knife with a blade of less than 2½ inches in length.

The definition names neither device. Whether a particular spray or stun gun is "readily capable of" causing serious bodily injury is a question of fact the statute does not answer. Subsection (d)(3) exempts "the lawful carrying of firearms or other dangerous weapons in a Federal facility incident to hunting or other lawful purposes," and subsection (h) requires notice of the ban to be posted at each public entrance. A "Federal facility" is "a building or part thereof owned or leased by the Federal Government, where Federal employees are regularly present for the purpose of performing their official duties."

Air travel. The Transportation Security Administration's screening rules, which are agency policy rather than statute, bar both devices from carry-on bags. One 4 fl. oz. (118 ml) container of mace or pepper spray is permitted in checked baggage if it has a safety mechanism to prevent accidental discharge, and sprays containing more than 2 percent by mass of tear gas (CS or CN) are prohibited in checked baggage. Tasers, stun guns and other electro-shock weapons may travel in checked baggage only if transported so the device cannot discharge accidentally. Airlines may set stricter rules.

National parks. National Park Service regulations prohibit possessing, carrying or using a "weapon" in a park area except as the regulations provide (36 CFR 2.4(b)(1)). 36 CFR 1.4 defines "weapon" to include an "irritant gas device" and any "weapon the possession of which is prohibited under the laws of the State in which the park area or portion thereof is located."

Disclaimer: This article provides general legal information about Idaho's pepper spray and stun gun laws as of September 2026. It is not legal advice. Consult a lawyer licensed in Idaho for advice about a specific situation.

For a state-by-state comparison, see pepper spray and stun gun laws by state. Idaho's self-defense statutes are covered separately on the Idaho self-defense laws page.

Statutes cited reflect their in-force version as of 2026-09-18. Last updated: 2026-09-18.