Are Butterfly Knives Legal in California? (2026)
Partially — Butterfly Knives are legal with restrictions in California as of 2026.
Law changed in 2023: In August 2023, the 9th U.S. Circuit Court of Appeals overturned California's ban on butterfly knives.
Quick Answer
Butterfly knives are legal to possess in California, but concealed carry is generally prohibited. In August 2023, the 9th U.S.
- Age restriction: 18+
What the Law Says
California law, following a 2023 court ruling, allows for the ownership and open carry of butterfly knives. Concealed carry is a misdemeanor, and local ordinances may impose stricter regulations.
— Cal. Pen. Code § 21510
| 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 |
In August 2023, the 9th U.S. Circuit Court of Appeals overturned California's ban on butterfly knives.
Enforcement Reality
Following a 2023 court ruling, the state-level ban on butterfly knives has been overturned. However, local ordinances may still be enforced, and open-carry is recommended to avoid issues.
A common mistake is believing that butterfly knives are still completely illegal. While the state ban is gone, it's crucial to be aware of local city or county restrictions.
Local Exceptions
None identified. State law applies uniformly across California. Local ordinances may still vary — check with your city or county government for any additional rules.
Real-World Scenarios: Butterfly Knives in California
Can You Fly With Butterfly Knives Out of California?
Since butterfly knives is restricted in California, bringing it to the airport compounds your legal exposure. You're now dealing with both state law and federal jurisdiction. Don't do it.
Can You Cross State Lines With Butterfly Knives From California?
This is where people get burned. California treats butterfly knives as restricted, but neighboring Nevada treats it as legal. The law changes at the state line — not gradually, not with a warning sign, instantly. "I bought it legally" is not a defense in the new state. Interstate highways near the California/Nevada border are known enforcement corridors. If you're driving with out-of-state plates in a state where butterfly knives is illegal, you're a target.
Bottom Line
Butterfly Knives are legal with restrictions in California. 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.
California 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. California falls in the RESTRICTED 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.
Comprehensive California Legal Guides
Explore all related legal topics in California — statutes, penalties, and enforcement in one place.