Legal note: This page is a CJRB educational summary, not legal advice. Missouri knife law can change, and local, federal, school, courthouse, airport, workplace, event, public-property, private-property, and transit rules may add restrictions. Use the source links below as a starting point and consult a qualified attorney for legal advice.
Last checked: July 25, 2026 · Primary sources: official state code, Justia, and official local/agency sources listed below
Missouri Knife Law Snapshot
Short version: Missouri's unlawful-use statute includes concealed carry of a knife or other weapon readily capable of lethal use. Ordinary pocketknife treatment depends heavily on definition, concealment, place, and lawful-use facts.
Concealed carry of a knife can trigger unlawful-use analysis.
Exhibiting a weapon in an angry or threatening manner is restricted.
Place rules remain important.
Use the current statutory definition and facts.
Can You Carry a Knife in Missouri?
| Situation | Plain-English summary | Status | Source |
|---|---|---|---|
| Ordinary pocketknife | Lower risk than weapons readily capable of lethal use, but facts and local/place rules still matter. | Medium caution | RSMo section 571.030 |
| Concealed knife | Missouri's unlawful-use statute includes knowingly carrying concealed upon or about the person a knife or other weapon readily capable of lethal use. | Concealed caution | RSMo section 571.030 |
| Angry or threatening display | Exhibiting a weapon readily capable of lethal use in an angry or threatening manner is restricted. | Restricted | RSMo section 571.030 |
| Knife definition | Missouri weapon rules rely on definitions for knife and weapon categories; verify current definitions before carry. | Definition caution | RSMo section 571.010 |
| Restricted places | Schools, courthouses, government facilities, private property, and federal locations should be checked separately. | Check place | RSMo chapter 571 |
Knife Type Notes
Use this as a practical EDC check. Ownership, open carry, concealed carry, place restrictions, age, and intent can be separate questions.
| Knife type | State summary | Carry risk |
|---|---|---|
| Pocket knives | Lower risk, but definition facts matter. | Medium |
| Large/fixed knives | Higher risk when concealed or displayed threateningly. | Medium |
| Switchblades / automatic knives | No simple statewide possession ban found in reviewed Missouri sources. | Medium |
| Balisongs | No balisong-specific statewide rule found in reviewed sources. | Medium |
Concealment and Conduct
Place-based and local rules are where many EDC mistakes happen. Check the exact school, courthouse, airport, park, transit system, workplace, venue, and private-property rule before carrying.
| Rule area | What to know | Status | Source |
|---|---|---|---|
| Concealed knife | Concealed carry is the main statewide knife issue. | Caution | RSMo section 571.030 |
| Threatening display | Threatening display can create risk even when simple possession would not. | Caution | RSMo section 571.030 |
Practical EDC Checklist
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01Start with knife type: Confirm whether the knife is ordinary utility carry or a listed/restricted weapon category.
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02Check carry method: Open carry and concealed carry can be treated differently.
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03Check the place: Schools, courthouses, airports, jails, public buildings, parks, and private venues often have stricter rules.
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04Check age and status: Minors, prohibited persons, and restricted-license contexts can change the answer.
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05Avoid weapon-like conduct: Threatening display, unlawful intent, or criminal-use facts can turn a tool into a legal problem.
Relevant Legal Sources
| Source | Why it matters | Status | Citation |
|---|---|---|---|
| RSMo section 571.030 | Unlawful use of weapons. | Source | RSMo section 571.030 |
| RSMo chapter 571 | Missouri weapons chapter. | Source | RSMo chapter 571 |
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