Are Butterfly Knives Legal in Missouri? (2026)
Yes — Butterfly Knives are legal in Missouri as of 2026.
Quick Answer
Butterfly knives are legal to own and carry in Missouri with no specific restrictions beyond general knife laws. No significant legislative changes in recent years.
- Age restriction: 18+ for purchase
What the Law Says
Missouri has no restrictions on the ownership or carry of butterfly knives.
— Mo. Rev. Stat. § 571.030
| Category | Details |
|---|---|
| Possession | Legal |
| Sale & Purchase | Legal |
| Penalties | N/A |
| Age Restriction | 18+ for purchase |
| Pending Legislation | None known |
No significant legislative changes in recent years.
Enforcement Reality
Missouri has no restrictions on the ownership or carry of butterfly knives. Enforcement is not a concern unless the knife is used in a crime.
There are few common mistakes as the laws are very clear and permissive.
Local Exceptions
None identified. State law applies uniformly across Missouri. Local ordinances may still vary — check with your city or county government for any additional rules.
Real-World Scenarios: Butterfly Knives in Missouri
Can You Fly With Butterfly Knives Out of Missouri?
Butterfly Knives may be legal in Missouri, but airports are federal territory. TSA screens under federal rules, not state law. If the item is federally restricted, expect problems at the checkpoint. Even if it clears TSA, the laws of your destination state apply the moment you land. Plenty of travelers have learned this the hard way — legal when they packed, criminal when they arrived.
Bottom Line
Butterfly Knives are legal in Missouri. You can carry them without violating state law, though federal rules and local ordinances may still apply. Always verify current law before acting.
Missouri vs. the Rest of the US
Across the US, carrying a butterfly knife is fully legal in 39 states, restricted in 10, and illegal in 1. Missouri falls in the LEGAL category.
View the full 50-state map →Reviewed by cross-referencing the cited state statute against current legislative databases and regulatory publications.
Sources & Verification
This page was reviewed by Ethan Harper by comparing the legal status against the cited state statute. AllowedHere is an informational resource and does not provide legal advice. Consult a licensed attorney for guidance specific to your situation.
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