Idaho is known for having relatively permissive laws when it comes to owning and carrying knives. Whether it’s a folding knife, switchblade, or automatic knife, the state generally allows the ownership and carry of various types of knives.
However, there are important legal distinctions regarding where and how knives—especially pocket knives—can be carried. Understanding these legal considerations is essential to ensure you stay within the law while carrying a pocket knife in Idaho.
Legal Ownership of Pocket Knives in Idaho
No Restrictions on Type or Size
In Idaho, there are no restrictions on the ownership or purchase of knives. This means you can legally own and buy any type of knife, including folding knives, fixed blades, switchblades, and automatic knives. The size of the knife and the mechanism used to open it do not matter from a legal standpoint, as long as the knife is not intended to harm or commit a crime.
Intent Matters
While ownership is generally unrestricted, intent is a crucial factor. If you are carrying or using a knife with the intent to threaten, harm someone, or commit a crime, this is illegal, regardless of the blade length or type. The law prioritizes the intent behind the use of the knife rather than the knife itself.
Carrying Pocket Knives in Idaho
Open Carry
Legal for All Knives: In Idaho, any law-abiding adult can openly carry any type of knife in public places, including pocket knives, regardless of the blade length or type.
No Permit Required: Open carry of knives does not require a special permit or license, making it a simple and legal way to carry a knife in public.
Concealed Carry
When it comes to concealed carry, there are some distinctions based on blade length and type:
| Blade Length / Type | Concealed Carry Without Permit | Concealed Carry With Permit | Notes |
|---|---|---|---|
| Pocket knife ≤ 4 inches | Legal | Legal | Not considered a deadly weapon. |
| Dirk, dagger, bowie > 4 in. | Illegal | Legal | Requires a concealed weapons license (CWL). |
| Any knife > 6 inches | Restricted | Restricted | Additional restrictions apply, especially in certain areas. |
Pocket knives with blades less than or equal to 4 inches can be concealed without a permit.
Dirks, daggers, and bowie knives with blades greater than 4 inches are illegal to carry concealed without a concealed weapons license (CWL).
Knives over 6 inches face further restrictions, particularly in some locations, and may be subject to additional rules.
Exemptions
Knives used for food preparation or eating are typically exempt from concealed carry restrictions, meaning you can carry them without facing legal trouble.
Special Restrictions on Knife Carrying
Schools and Restricted Locations
Schools (K-12) and school buses have strict rules about knives. Only pocket knives with blades less than 2.5 inches are allowed. Any other knives are prohibited on school property and buses.
Other restricted areas include courthouses, jails, juvenile detention centers, and some child care facilities where knives are not permitted.
Penalties for violating these restrictions can result in fines or misdemeanor charges.
Minors
Pocket knives: Minors under 18 are allowed to carry pocket knives.
Other knives: Minors need written parental permission to carry knives other than pocket knives. Additionally, selling knives like dirks, daggers, or bowie knives to minors is considered a misdemeanor.
Statewide Preemption of Knife Laws
As of July 1, 2024, Idaho will enforce statewide preemption for knife laws. This means that local governments cannot enact knife laws that are stricter than the state’s laws.
However, exceptions still exist for certain places like schools, courthouses, and similar restricted areas.
Practical Guidance
Check Local Ordinances: Although statewide preemption applies, always verify local laws for any remaining restrictions, especially in restricted areas.
Carry Openly When in Doubt: Open carry of knives is broadly legal and less likely to result in legal complications.
Avoid Restricted Locations: Be mindful of areas like schools, courthouses, and jails where knives are prohibited.
Use Responsibly: Always be aware of how you use your knife. Never use or display a knife in a threatening manner unless it’s justified by lawful self-defense.
Sources:
1. https://thewrangler.com/understanding-your-knife-rights-in-idaho-a-legal-guide/2025/07/01/
2. https://www.carved.com/blogs/life-at-carved/pocket-knife-rules-laws-by-state
3. https://www.survivalsullivan.com/idaho-knife-laws/
