Is Switchblades / Automatic Knives Legal in South Dakota? (2026)
Partially — Switchblades / Automatic Knives are legal with restrictions in South Dakota as of 2026.
Law changed in 2019: The law was clarified in 2019 to remove any ambiguity about the legality of switchblades. No major changes since.
Quick Answer
South Dakota law does not specifically prohibit the possession, sale, or carry of switchblades or automatic knives. There are no state statutes restricting automatic knives, making them generally legal to own and sell.
What the Law Says
South Dakota law does not prohibit the possession or carry of switchblades. There are no restrictions on knife types for adults.
— South Dakota Codified Laws - Weapons
| Category | Details |
|---|---|
| Possession | Legal to possess switchblades; no specific restrictions found. |
| Sale & Purchase | Legal to sell and purchase switchblades within the state. |
| Penalties | N/A |
| Age Restriction | None |
| Pending Legislation | None known |
The law was clarified in 2019 to remove any ambiguity about the legality of switchblades. No major changes since.
Enforcement Reality
South Dakota has very permissive knife laws. Switchblades are legal to own and carry, openly or concealed. Enforcement is focused on criminal intent.
A common mistake is to carry a knife into a courthouse or other prohibited location.
Local Exceptions
None identified. State law applies uniformly across South Dakota. Local ordinances may still vary — check with your city or county government for any additional rules.
Real-World Scenarios: Switchblades / Automatic Knives in South Dakota
Can You Fly With Switchblades / Automatic Knives Out of South Dakota?
Since switchblades / automatic knives is restricted in South Dakota, 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 Switchblades / Automatic Knives From South Dakota?
This is where people get burned. South Dakota treats switchblades / automatic knives as restricted, but neighboring North Dakota 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 South Dakota/North Dakota border are known enforcement corridors. If you're driving with out-of-state plates in a state where switchblades / automatic knives is illegal, you're a target.
Bottom Line
Switchblades / Automatic Knives are legal with restrictions in South Dakota. 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.
South Dakota vs. the Rest of the US
Across the US, carrying a switchblade is fully legal in 19 states, restricted in 17, and illegal in 14. South Dakota falls in the RESTRICTED category.
View the full 50-state map →Body Armor Laws Guide
This topic is closely related to body armor and self-defense laws.
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 South Dakota Legal Guides
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