Knife laws in Colorado are tricky, luckily we are here to help. Below is a list of legal and illegal knives in Colorado written in plain English. We will also then give you more specific details with quotes from the law and case precedence.

    Colorado Knife Laws in Brief

    These knives are legal to own:

    • Dirks, daggers, push knives and stilettos are legal.
    • Bowie knives and other large blades are legal.
    • Disguised knives like belt knives, pen knives, cane knives, and lipstick knives are legal.
    • Balisong/butterfly knives are in a legal gray area.
    • Gravity knives and switchblades.

    These knives are illegal to carry:

    • Ballistic knives

    These knives are illegal to carry concealed:

    • Any knife with a blade over 3.5 inches in length

    Knives that are Banned in Colorado

    18-12-102. Possessing a dangerous or illegal weapon – affirmative defense

    (1) As used in this section, the term “dangerous weapon” means a firearm silencer, machine gun, short shotgun, short rifle, or ballistiknife.

    (2) As used in this section, the term “illegal weapon” means a blackjack, gas gun, metallic knuckles, gravity knife, or switchblade knife.

    (3) A person who knowingly possesses a dangerous weapon commits a class 5 felony. Each subsequent violation of this subsection (3) by the same person shall be a class 4 felony.

    (4) A person who knowingly possesses an illegal weapon commits a class 1 misdemeanor.

    What the Colorado knife law states is that it is a crime to possess a dangerous or illegal weapon. A ballistiknife is a dangerous weapon and is a felony offense (1 or more years in jail).

    What Colorado Law Says About Concealed Knives

    18-12-105. Unlawfully carrying a concealed weapon – unlawful possession of weapons

    (1) A person commits a class 2 misdemeanor if such person knowingly and unlawfully:

    (a) Carries a knife concealed on or about his or her person;

    Knife” means any dagger, dirk, knife, or stiletto with a blade over three and one-half inches in length, or any other dangerous instrument capable of inflicting cutting, stabbing, or tearing wounds, but does not include a hunting or fishing knife carried for sports use. The issue that a knife is a hunting or fishing knife must be raised as an affirmative defense.

    It is illegal to carry a knife other thaa fishing or hunting knife that is greater than 3.5 inches concealed. Concealed means to be out of sight and close enough to be available for immediate use. It is not illegal to carry a concealed knife on your property. It is also not illegal to carry a concealed knife when you are driving if you are carrying the knife to protect yourself.

    It is legal to carry concealed a push knife if it is less than 3.5 inches.

    In the case A.P.E vs People in 2001, it was found that a knife that is less than 3.5 inches is not a weapon if the prosecution can not prove that the person intended on using it as a weapon. In the case, the defendant was found with a push knife that was less than 3.5 inches and the police charged him with unlawful carry of a concealed weapon. The prosecution could not prove that he intended to use it as a weapon and he was found not guilty of the charge.

    Conclusion on Colorado Knife Law

    In Colorado, you can own almost any knife as long as it is not a  ballistic knifeAll legal knives can be carried in the open. It is illegal to carry concealed a knife that is larger than 3.5 inches unless it is a fishing or hunting knifeAny knife with a blade shorter than 3.5 inches can be carried openly or concealed.

    This article is not exhaustive and there are city laws that also come into play. Check with your city before you consider doing anything.  For example, it is illegal to carry any knife concealed in Boulder County.

    Note: this is not legal advice and I am not an attorney. Talk to a real attorney if you need legal advice. Post any question you have below and I’ll try to answer them to the best of my abilities. We are also trying to find an attorney in Colorado who is willing to do an interview.

    *updated May 8, 2018

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    Is a butterfly knife illegal in Colorado?
    Colorado Knife Laws in Brief Bowie knives and other large blades are legal. Disguised knives like belt knives, pen knives, cane knives, and lipstick knives are legal. Balisong/butterfly knives are in a legal gray area. Gravity knives and switchblades. more
    Is it legal to carry a knife in Colorado?
    Colorado law allows you to own and openly carry any kind of knife except ballistic knives. Switchblades are also legal to possess except in certain cities, including Denver. But you may never conceal carry knives with a blade length of 3.5 inches or more unless they are for hunting or fishing. more
    Can I carry a knife in my car in Colorado?
    You can also conceal carry these knives in a private automobile (or other private transportation) for lawful protection purposes. Note that there is also an exemption of the concealed carry law for law enforcement officers. CCW permits are usually not necessary to carry concealed knives in Colorado. more
    How big of a knife can you open carry in Colorado?
    Conclusion on Colorado Knife Law All legal knives can be carried in the open. It is illegal to carry concealed a knife that is larger than 3.5 inches unless it is a fishing or hunting knife. Any knife with a blade shorter than 3.5 inches can be carried openly or concealed. more
    Can I carry a knife in Colorado?
    Colorado knife laws generally allow people to carry knives openly in public. It is also lawful to carry a knife concealed on the person – so long as (1) it is not a ballistic knife and (2) the blade length is 3.5 inches or less. The statute 18-12-101 C.R.S. more
    What size knife is legal in Colorado?
    Conclusion on Colorado Knife Law All legal knives can be carried in the open. It is illegal to carry concealed a knife that is larger than 3.5 inches unless it is a fishing or hunting knife. Any knife with a blade shorter than 3.5 inches can be carried openly or concealed. more
    Can a felon own a knife in Colorado?
    Since many Coloradoans enjoy the outdoors we are frequently asked if felons can possess a knife or other equipment for hunting or fishing. According to Colorado Revised Statutes (C.R.S) 8-12-108 a felon cannot possess a weapon. more
    How long of a knife can you carry in Colorado?
    Conclusion on Colorado Knife Law All legal knives can be carried in the open. It is illegal to carry concealed a knife that is larger than 3.5 inches unless it is a fishing or hunting knife. Any knife with a blade shorter than 3.5 inches can be carried openly or concealed. more
    Can you keep a knife in your car Colorado?
    You can also conceal carry these knives in a private automobile (or other private transportation) for lawful protection purposes. Note that there is also an exemption of the concealed carry law for law enforcement officers. CCW permits are usually not necessary to carry concealed knives in Colorado. more
    Can a felon carry a knife in Colorado?
    Since many Coloradoans enjoy the outdoors we are frequently asked if felons can possess a knife or other equipment for hunting or fishing. According to Colorado Revised Statutes (C.R.S) 8-12-108 a felon cannot possess a weapon. more
    What is the difference between a bread knife and a serrated knife?
    A bread knife looks like a longer, more exaggerated version of a serrated utility knife. Its serrated grooves are specifically designed to cleanly slice through bread without crushing it. more

    Source: knifeup.com

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