Idaho Knife Laws: Legal Carry Points Explained

Idaho is known for being very friendly to knife owners. The state has some of the loosest knife laws in the country, and recent changes have made carrying knives even easier for residents and visitors alike. Whether you carry for work, outdoor use, or everyday use, Idaho offers greater freedom than many other states.

If you carry a folding knife, fixed blade, or any other type of knife, it’s still important to understand where those freedoms begin and end. Certain locations, age limits, and carry rules can affect what is allowed in specific situations. Here are the main things to keep in mind before carrying a knife in Idaho.

What Idaho Allows and Restricts

• Blades six inches or shorter face no restrictions under state law

• Switchblades, automatics, balisongs, and OTF knives are all legal

• Statewide preemption took effect July 1, 2024, voiding local restrictions

• Concealed carry allowed at 18 for U.S. citizens without a permit

• School carry is limited to pocketknives with blades under 2.5 inches

• Courthouses, jails, prisons, and schools remain restricted zones

• Vehicle carry of concealed weapons is permitted

What Idaho Law Says About Knife Carry

Idaho does not ban knives in general. If your knife blade is six inches or shorter, it is not considered a deadly weapon under state law. This covers most folding knives, fixed blades, and everyday carry tools.

Knives used for cooking or eating are not considered deadly weapons, no matter how long the blade is. Carrying a fillet knife or chef’s knife to a campsite is legal under Idaho law.

If your knife blade is longer than six inches, there are additional rules, but Idaho remains more relaxed than most states. The law looks at why and how you are carrying the knife, not just its size.

Switchblades, Automatics, and OTF Knives

Idaho has never prohibited switchblades or automatic knives. Automatic knives, out-the-front models, and other quick-release mechanisms are fully legal to own and carry with no blade-length restrictions.

This means your automatic folder or OTF from us can ride in your pocket without concern for the deployment mechanism. The state treats them the same as manual folders for legal purposes.

Balisong knives, also known as butterfly knives, are legal in Idaho. Unlike some states, Idaho does not restrict them based on their flipping action.

Statewide Preemption: What Changed in 2024

Governor Brad Little signed HB 620, which took effect on July 1, 2024. This law added knife preemption to Idaho’s statutes, preventing cities, counties, and other political subdivisions from enacting rules, ordinances, or taxes on knives that exceed state law restrictions.

Any local rules that were stricter than state law are no longer in effect. Before this change, a knife that was legal in one city might have been a problem in another. Idaho now has uniform knife laws across the state.

Concealed Carry Without a Permit

Idaho allows what’s often called constitutional carry. If you meet the requirements below, you can carry a concealed weapon without a license.

• At least 18 years old

• United States citizen or current member of the U.S. Armed Forces

• Not disqualified from obtaining a concealed weapons license under Idaho law

You can’t carry concealed if you have a felony, certain misdemeanors, mental health rulings, or other issues listed in Idaho law. If you’re allowed to own a gun in Idaho, you can probably carry a knife concealed without extra paperwork.

Vehicle Carry Rules

You can carry any deadly weapon, including knives of any length, concealed in your vehicle, whether it’s loaded or not. You must be at least 18 and either a U.S. citizen or an active-duty military member.

This rule makes it easy to transport larger fixed-blade knives. Even if your knife is long enough to be considered a deadly weapon, you can still carry it in your car or truck without a problem.

Where Knives Are Restricted

Specific locations remain off-limits for weapon carry, including knives. These restricted zones include:

• Courthouses

• Juvenile detention facilities

• Adult correctional facilities

• Prisons and jails

• Public schools (K-12)

• Private schools

If you have a weapon on school grounds, you could face up to a year in jail and a $1,000 fine. It’s important to know where you are and follow the rules.

School Carry Exception

Idaho law makes a slight exception for schools. You can carry a pocketknife with a blade under 2.5 inches on K-12 school grounds and school buses. This allows students or visitors to have small utility knives for daily use.

If your knife blade is longer than 2.5 inches, it’s not allowed on school property. Leave it in your vehicle before going onto school grounds.

Licenses for Reciprocity and Travel

Idaho offers two concealed weapons license types: the basic license under Idaho Code 18-3302 and the Enhanced license under Idaho Code 18-3302K.

You don’t need a license to carry in Idaho, but a license is helpful if you travel. Idaho accepts concealed weapons permits from all other states. If you’re a non-resident carrying concealed in Idaho, you need a valid license from your home state.

The Enhanced license is harder to get, but more states accept it. Right now, 39 states honor Idaho’s Enhanced CWL. Some states accept only the Enhanced version because it requires additional training and background checks.

Both licenses remain valid for five years from the date of issue.

Practical Considerations for EDC Carriers

Most everyday carry knives are legal in Idaho. A regular folding knife, a small fixed blade, or an automatic folder are all fine to carry in the state.

The six-inch rule applies to larger knives. If you carry a large knife for outdoor work or fun, remember this limit. Knives six inches or shorter are not considered deadly weapons.

The 2024 preemption law made travel between Idaho cities easier. Now, places like Boise, Pocatello, and Coeur d’Alene all follow the same knife laws. You don’t have to worry about different city rules anymore.

What to Remember

Idaho grants knife owners significant freedom. The state doesn’t ban any knives, allows adults to carry concealed without a permit, and has removed confusing local rules. Schools, courts, and jails remain off-limits, but the rules are clear and easy to follow.

Carrying a good knife from us is legal in almost all situations in Idaho. For the simplest legal status, keep your blade under six inches, follow the 2.5-inch rule near schools, and enjoy Idaho’s simple knife laws.