Colorado Knife Laws

Colorado Knife LawsKnife laws in Colorado are straight forwarded and strict a little but easy to understand and less tricky. There are some knives totally banned in Colorado.

According to Colorado knife laws, people can carry and keep knives to protect them but they cannot conceal those.

C.R.S. Const. Art. No. 2, 13: “The right of no person to keep and bear arms in defense of his home, person and property, or in aid of the civil power when thereto legally summoned, shall be called in question; but nothing herein contained shall be construed to justify the practice of carrying concealed weapons.”

Knives that are Banned in Colorado

Gravity knives, switchblades, and ballistic knives were illegal to carry but own one in the knife laws of Colorado 2014 and the code was C.R.S. 18-12-102.

From the newly updated law of August 9th, 2017, with the code C.R.S. 18-12-101, gravity knives or automatic knives are no more illegal or dangerous weapon in Colorado.

But still, “Ballistic knives” are illegal and mentioned as the dangerous weapon in the section. So, the ballistic knives are totally banned in Colorado now.

What will happen if you still possess one?

If you possess this dangerous or deadly weapon, “ballistic knife”, it will be a felony offense and you will be punished by a year (1 year) or more years in jail and/or, a fine of $1,000-$100,000.


Concealing knives & Length of the Blade is Important in Colorado

“3.5 inches” is the number you should remember always.

If the size of the blades of knives is over 3.5 inches, those knives are illegal. You cannot carry a knife concealed over 3.5 inches blade sized. It will be illegal.

Code 18-12-105 says,

“ ‘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 hunting or fishing knife must be raised as an affirmative defense.”

If you are there for fishing and hunting then all fishing and hunting knives are legal in Colorado with no fixed length of blade size.

In code, C.R.S. 18-12-101 says, all fishing and hunting knives more than 3.5 inches blade sized can be carried concealed.

A Bowie knife, machete or sword, and hunting knives can be carried openly with any size of blades.

Legal Defenses if you are charged

  • If you are a member of the armed forces of the United States or Colorado.
  • If you have a valid permit or license for the possession of that dangerous or illegal knife.
  • If you had no idea you possessed an illegal one.
  • If the knife you are possessing does not work or have the quality of being dangerous or deadly even if it shows as one.

You can defend yourself when charged if you can prove one of the followings.

Knives that are Legal in Colorado

Other than the restrictions, most of the knives are legal in Colorado. These are,

  • Pocket knives/ Folding knives
  • Butterfly knives
  • Switchblades
  • Bowie knives
  • Machete
  • Swords
  • Dirks/Daggers/Stilettos

All educational institutions are highly restricted for any deadly weapons

Dangerous or deadly weapons or knives are illegal to carry in any school campus, ground or buildings in Colorado. From kindergarten to schools even university areas are restricted to possess one.

Code 18-12-105 (5) explains the illegality of carrying knives or deadly weapons in these places.

A conclusion to the knife laws in Colorado

In Colorado, concealing a knife over 3.5 inches is a crime. Otherwise, you can carry any knives (except ballistic knife) openly. And about hunting and fishing, there are some exceptions.

Till 2017, gravity knives, ballistic knives, and switchblades were banned but now only ballistic knives are illegal there. The law is now updated. So, don’t get confused.


Hi this is Patricia Smith! I am a 30 year old mom blessed with two Beautiful children! I love cooking & this blog is a small effort of mine to guide others on a healthy cooking habit.

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