Is Butterfly Knives Legal in Washington? (2026)
Partially — Butterfly Knives are legal with restrictions in Washington as of 2026.
Quick Answer
Butterfly knives are legal to possess in Washington, but concealed carry is generally prohibited. No significant legislative changes in recent years.
- Age restriction: 18+
What the Law Says
Washington law prohibits the possession of butterfly knives. It is a gross misdemeanor.
— Wash. Rev. Code § 9.41.250
| Category | Details |
|---|---|
| Possession | Legal to own at home |
| Sale & Purchase | Legal to sell |
| Penalties | Carrying concealed may result in misdemeanor charges. |
| Age Restriction | 18+ |
| Pending Legislation | None known |
No significant legislative changes in recent years.
Enforcement Reality
It is illegal to possess a butterfly knife in Washington. This is strictly enforced.
The most common mistake is believing that it is legal to own a butterfly knife as a collector's item. It is not.
Local Exceptions
None identified. State law applies uniformly across Washington. Local ordinances may still vary — check with your city or county government for any additional rules.
Bottom Line
Butterfly Knives are legal with restrictions in Washington. This product is permitted, but specific conditions apply. Violating those conditions can result in fines or criminal charges. Read the rules carefully and consult an attorney if unsure.
Washington 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. Washington falls in the RESTRICTED category.
View the full 50-state map →Neighboring States
Laws change at state lines. Here is how bordering states compare on Butterfly Knives:
Frequently Asked Questions
Is it legal to carry Butterfly Knives in Washington?
What are the restrictions on carrying a butterfly knife in Washington?
What mistakes do people make with carrying a butterfly knife in Washington?
What is the age restriction for carrying a butterfly knife in Washington?
Does the law on carrying a butterfly knife change at the Washington border?
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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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