Missouri is known for its relatively permissive knife laws, but there are important distinctions and restrictions every resident and visitor should understand. This guide explains what types of knives are legal, how and where you can carry them, and the key limitations you need to know to stay within the law.
What Knives Are Legal in Missouri?
Most types of knives are legal to own and carry in Missouri, including folding knives, fixed-blade knives, daggers, dirks, stilettos, bowie knives, balisongs (butterfly knives), and even automatic knives or switchblades (since 2012, as long as federal law is not violated).
There are no statewide bans on specific knife types. However, using any knife in the commission of a crime is illegal and can result in severe penalties.
Carrying Knives: Open vs. Concealed
Open Carry
Open carry of any legal knife is generally permitted throughout Missouri.
There are location-based restrictions (see below) where carrying any weapon, including knives, is not allowed.
Concealed Carry
Ordinary pocketknives (folding knives with blades 4 inches or less) can be carried concealed without restriction.
Knives with blades over 4 inches or non-pocketknife styles (fixed blades, daggers, etc.) cannot be carried concealed unless you have a concealed carry permit or fall under specific exceptions.
Concealed carry of restricted knives without proper authorization can result in a misdemeanor charge.
Table: Missouri Knife Carry Laws
| Knife Type | Open Carry | Concealed Carry (No Permit) | Notes |
|---|---|---|---|
| Ordinary pocketknife ≤4″ | Yes | Yes | Folding blade only |
| Fixed-blade knife >4″ | Yes | No | Concealed carry restricted |
| Switchblade/Automatic | Yes | Yes (≤4″ folding blade) | Legal since 2012, federal law applies |
| Other (dagger, stiletto) | Yes | No | Concealed carry restricted |
Restricted Locations
Even if your knife is legal, you cannot carry any knife (open or concealed) in certain locations, including:
Schools (public and private)
Government buildings (courthouses, police stations)
Polling places on election day
Bars and restaurants serving alcohol (may have their own policies)
Airports and secure areas
Local ordinances may impose stricter rules, especially in urban areas. Always check city or county laws before carrying a knife in a new area.
Who Cannot Carry Knives?
Convicted violent felons and individuals deemed mentally incompetent may be prohibited from possessing or carrying knives.
There are no specific age restrictions for knife ownership or carry in Missouri, but minors are subject to the same rules as adults.
Key Points and Practical Tips
No permit is required for open or concealed carry of ordinary pocketknives (≤4″ folding blade).
Do not conceal carry knives with blades over 4 inches or non-pocketknife styles unless you have a concealed weapons permit.
Check local laws before carrying knives in different cities or counties.
Never bring knives to restricted locations listed above.
Using a knife unlawfully (threatening, brandishing, or committing a crime) can result in felony charges, regardless of the knife’s legality
Missouri law is generally favorable to knife owners, allowing open carry of most knives and concealed carry of ordinary pocketknives. However, concealed carry of larger or non-folding knives is restricted, and there are important location-based prohibitions. Always check local ordinances and use knives responsibly to avoid legal trouble.
Sources
[1] https://tkellknives.com/knife-laws-in-missouri-your-guide-to-legal-carry-and-restrictions/
[2] https://www.tektoknives.com/blogs/news/missouri-knife-laws-updated-2021-is-it-legal-to-carry-a-knife-in-2021
[3] https://www.battlbox.com/blogs/carry-laws/can-you-open-carry-a-knife-in-missouri-a-comprehensive-guide
[4] https://nobliecustomknives.com/us-knife-laws/missouri-knife-laws/
[5] https://www.akti.org/state-knife-laws/missouri/
