Missouri has some of the most permissive knife laws in the United States. Residents and visitors enjoy broad rights to own, carry, and use knives, but there are important rules and exceptions you should know to stay within the law.
What Types of Knives Are Legal?
Most knives are legal to own and carry in Missouri. This includes pocket knives, folding knives, hunting knives, Bowie knives, and even automatic (switchblade) knives, provided they comply with federal law.
There are no state-level bans on specific knife types, but using any knife in a crime is illegal.
Open Carry vs. Concealed Carry
Open Carry
Open carry of knives is generally legal for all types and blade lengths, except in certain restricted locations (see below).
Concealed Carry
Ordinary pocket knives (folding knives with blades 4 inches or less) can be carried concealed without restriction.
Other knives (fixed blades, daggers, dirks, stilettos, etc.) with blades longer than 4 inches cannot be carried concealed without a concealed carry weapons permit.
Concealed carry permits: Holders may carry larger or otherwise restricted knives concealed, but must still follow location-based restrictions.
Blade Length Rules
| Knife Type | Concealed Carry Legal? | Blade Length Limit |
|---|---|---|
| Ordinary pocket knife | Yes | 4 inches or less |
| Other knives (fixed, etc) | No (unless permitted) | Over 4 inches |
Restricted Locations
Even with a permit, you cannot carry knives (open or concealed) in certain places, including:
Schools and school buses
Courthouses and government buildings
Police stations and jails
Bars and establishments where alcohol is served
Airports and other federally regulated areas
Local ordinances may impose additional restrictions, so always check city or county rules before carrying a knife in urban areas.
Who Cannot Carry Knives?
Convicted felons and those judged mentally incompetent may be prohibited from possessing knives.
Minors: There are no specific state restrictions on minors owning or carrying knives, but general criminal statutes apply.
Automatic and Switchblade Knives
Legal to own and carry in Missouri, as long as they comply with federal law (e.g., not transported across state lines in violation of the Federal Switchblade Act).
Using Knives for Self-Defense
Missouri law recognizes the right to self-defense, but using a knife as a weapon must be justified by the circumstances. Using a knife unlawfully or with criminal intent can result in serious charges.
Key Takeaways
Missouri allows open carry of most knives.
Concealed carry is legal for pocket knives with blades 4 inches or less.
Larger or fixed-blade knives cannot be carried concealed without a permit.
Knives are banned in certain locations, regardless of permit status.
Always check local ordinances for additional restrictions.
If you are unsure about your rights or face charges related to knife possession or use, consult a qualified Missouri attorney for legal guidance.
Sources:
- https://www.akti.org/state-knife-laws/missouri/
- https://www.battlbox.com/blogs/carry-laws/can-you-open-carry-a-knife-in-missouri-a-comprehensive-guide
- https://nobliecustomknives.com/us-knife-laws/missouri-knife-laws/
