South Dakota does not impose one statewide blade-length limit or a general ban on automatic, OTF, or butterfly knives. Its current general concealed-weapon provision is narrow: it penalizes concealing a controlled or dangerous weapon with intent to commit a felony. Older general concealed-carry sections were repealed in 2019. [1]
Ordinary lawful knife possession and carry are generally not prohibited by a statewide design or blade-length rule, but schools, courthouses, the State Capitol, secured events, unlawful intent, and threatening use create separate restrictions.
How does South Dakota define a dangerous weapon?
South Dakota defines a “dangerous weapon” or “deadly weapon” to include a firearm, stun gun, knife, or other object that is calculated or designed to inflict death or serious bodily harm, or that is used in a manner likely to do so. [2]
The definition is context-sensitive. It should not be summarized as a ban on every ordinary pocketknife.
Can adults own and carry common knife types?
The cited statutes do not create a general prohibition on adults owning manual folders, fixed blades, automatic knives, OTF knives, or balisongs, and they do not set a statewide maximum blade length.
Section 22-14-8 prohibits concealing a controlled or dangerous weapon when the person also has intent to commit a felony. Sections 22-14-9, 22-14-9.1, 22-14-10, and 22-14-11—the older general concealed-carry provisions—are repealed. [1]
Using, displaying, or possessing a knife during another crime can create separate liability. Legal carry never authorizes threats, assault, burglary, or other unlawful conduct.
How should knives be transported in a vehicle?
South Dakota’s cited general knife statutes do not create a separate blade-length limit for vehicle transport. Keep the knife closed or sheathed and secured during travel, and verify the destination’s rules. A vehicle located on public K–12 school property is specifically included in the school restriction. [3]
Where are dangerous weapons restricted?
Section 13-32-7 makes it a Class 1 misdemeanor to intentionally carry, possess, store, keep, or leave a dangerous weapon on or in public elementary or secondary school premises, vehicles, buildings, or premises used for public school functions, unless an enumerated exception applies. The text includes an exception for nonpublic schools, among others. [3]
Knowingly possessing a dangerous weapon in a county courthouse or the State Capitol is also a Class 1 misdemeanor unless an exception applies. Courts retain authority to regulate weapons in court buildings and related grounds. [4]
Local governments may restrict lawful dangerous-weapon carry in a building or facility during an event when metal detectors screen entrants and armed security is posted at every public entrance. [5]
Do local and property rules matter?
South Dakota’s local-government provisions do not justify a claim that every knife rule is preempted statewide. Event restrictions, court rules, school rules, employer policies, private-property conditions, and tribal or federal law may all apply. Verify the exact location before carrying.
Practical takeaway
South Dakota has no general statewide four-inch rule and no current general ban on concealed knives. The important limits are conduct- and location-based: felony intent, public K–12 property, courthouses, the State Capitol, secured events, and other property rules.
Last reviewed: August 24, 2026.
This article provides general information, not legal advice. South Dakota knife law can depend on design, intended use, concealment, criminal intent, age, school status, location, tribal or local rules, and court interpretation. Verify current official sources or consult a qualified South Dakota attorney about a specific situation.
Sources & References
- [1] South Dakota Codified Laws Chapter 22-14. Felony-intent concealment rule and repealed former concealed-carry sections.
- [2] SDCL 22-1-2(10). Dangerous-weapon or deadly-weapon definition.
- [3] SDCL 13-32-7. Dangerous weapons on public elementary and secondary school property and listed exceptions.
- [4] SDCL 22-14-23 to 22-14-28. Courthouse and State Capitol restrictions, exceptions, notices, and court authority.
- [5] SDCL 9-14-45. Municipal dangerous-weapon restrictions at screened, guarded events.
