Is Switchblades / Automatic Knives Legal in Idaho? (2026)
Yes — Switchblades / Automatic Knives are legal in Idaho as of 2026.
Law changed in 2024: In 2024, Idaho passed a law prohibiting cities and counties from enacting knife regulations stricter than state law.
Quick Answer
Idaho law does not specifically prohibit switchblade knives. According to Idaho Code §18-3302, switchblades are not listed among prohibited weapons, making their possession and sale generally legal.
What the Law Says
Idaho law does not prohibit the possession or carry of switchblades. There are no blade length restrictions for adults.
— Idaho Code Title 18, Chapter 33
| Category | Details |
|---|---|
| Possession | Legal to possess switchblades. |
| Sale & Purchase | Legal to sell and purchase switchblades. |
| Penalties | N/A |
| Age Restriction | None |
| Pending Legislation | None known |
In 2024, Idaho passed a law prohibiting cities and counties from enacting knife regulations stricter than state law.
Enforcement Reality
Idaho has very permissive knife laws. Switchblades are legal to own and carry. Enforcement is focused on the use of a knife in a crime, not on the type of knife being carried.
A common mistake is to carry a knife with a blade over 6 inches concealed without an enhanced concealed weapons license. Also, knives are prohibited in schools and courthouses.
Local Exceptions
None identified. State law applies uniformly across Idaho. Local ordinances may still vary — check with your city or county government for any additional rules.
Real-World Scenarios: Switchblades / Automatic Knives in Idaho
Can You Fly With Switchblades / Automatic Knives Out of Idaho?
Switchblades / Automatic Knives may be legal in Idaho, but airports are federal territory. TSA screens under federal rules, not state law. If the item is federally restricted, expect problems at the checkpoint. Even if it clears TSA, the laws of your destination state apply the moment you land. Plenty of travelers have learned this the hard way — legal when they packed, criminal when they arrived.
Can You Cross State Lines With Switchblades / Automatic Knives From Idaho?
This is where people get burned. Idaho treats switchblades / automatic knives as legal, but neighboring Oregon treats it as illegal. The law changes at the state line — not gradually, not with a warning sign, instantly. "I bought it legally" is not a defense in the new state. Interstate highways near the Idaho/Oregon border are known enforcement corridors. If you're driving with out-of-state plates in a state where switchblades / automatic knives is illegal, you're a target.
Bottom Line
Switchblades / Automatic Knives are legal in Idaho. You can carry them without violating state law, though federal rules and local ordinances may still apply. Always verify current law before acting.
Idaho vs. the Rest of the US
Across the US, carrying a switchblade is fully legal in 19 states, restricted in 17, and illegal in 14. Idaho falls in the LEGAL category.
View the full 50-state map →Body Armor Laws Guide
This topic is closely related to body armor and self-defense laws.
Reviewed by cross-referencing the cited state statute against current legislative databases and regulatory publications.
Sources & Verification
This page was reviewed by Ethan Harper by comparing the legal status against the cited state statute. AllowedHere is an informational resource and does not provide legal advice. Consult a licensed attorney for guidance specific to your situation.
Comprehensive Idaho Legal Guides
Explore all related legal topics in Idaho — statutes, penalties, and enforcement in one place.