The Idaho Constitution states that individuals have a right to own and bear an arm and this right will not be infringed upon. However, these provisions may not prohibit the laws associated with governing weapons that are carried in a concealed manner on an individual or stop legislation that provides the minimum sentences related to crimes that have been committed while the person was carrying the firearm or weapon. Nor will it stop the legislation passage that comes with penalties for possessing a firearm when recognized as a convicted felon or stop the process of any type of legislation that punishes using this firearm. None of the laws will impose special taxation, registration or license for the possession or ownership of a firearm along with its ammunition. In addition, no law will allow for the confiscation of a firearm provided that they have not been in use to act out a felony.

The Idaho law states a very clear rule that involves that an individual is permitted to carry any type of knife in a concealed manner, provided the blade on the knife does not exceed 4 inches. In these chapters it states:

A.A concealed weapon which translates into any weapon that is deadly that is carried about or on the person in a way that it is not detectable with an ordinary observation.

B.A Deadly weapon is associated with:

• Any dirk knife, bowie knife, firearm, dirk or dagger

• Any other type of substance, material, instrument, device or weapon manufactured or designed that is capable of initiating serious types of bodily injuries or death

• Any substance, weapon, material, instrument or device that has been intended by an individual to be capable of producing serious types of bodily harm or death

C.The term is known as “deadly weapon” will not include:

• Any cleaver, knife or other types of instruments which serve the purpose of being used in eating, preparing or processing food

• Any type of knife that has a blade that is under 4 inches

• Any mace, pepper-spray, taser or stun gun

In order to carry around a dagger, bowie knife, dirk or knife that has larger blades the law in Idaho states that the individual must obtain or possess a license in order to carry these concealed weapons. No individual will be allowed to carry one of these concealed weapons about or on their person without a license except when:

• The weapon is in the individual’s home or their fixed business location

• On a property whereby the individual has leasehold interest or ownership

• On a private property when the individual has been granted permission to carry a concealed weapon from an individual with leasehold interest or ownership

• Outside the confines or limits of the city when the individual is over the age of 18 and has not been disqualified from the issue meant of such a license.
It is important to note that statute has no outlaw carrying concealed knives in the state of Idaho. However, the law of the state states that it is an unlawful action for any individual to carry these concealed weapons when they have become intoxicated or are currently under the influence of a drug or drink that is intoxicating. Any violations associated with these provisions are regarded as a type of misdemeanor.


No individual is permitted to possess or carry dangerous or deadly weapons or firearms on a school property. Dangerous or deadly weapons that include a knife will have a blade that exceeds 2 and a half inches. Knives that exceed 2 and a half inches are prohibited on any type of school grounds or school transport or functions. This is to ensure that children under the age of 18 are kept safe in their school environment.

This information that is presented as a brief description of the laws and not as any kind of legal advice. aStraightArrow will not and cannot be a legal service provider. The use of the site does not create any sort of client/lawyer relationship. The knife laws are interpreted differently by prosecuting attorneys, enforcement officers, and judges. aStraightArrow suggests you consult legal counsel for further guidance.