Maximum Legal Blade Length
- State Maximum: No general statewide maximum
- Local Preemption: No statewide knife preemption; verify local ordinances (cities may add limits)
Categories of Knives
South Dakota is generally knife‑friendly; restrictions mainly arise from location bans (schools, courthouses, Capitol) and intent‑based crimes.
Prohibited and Federally Regulated Knives
- Switchblades/Automatics: Legal under SD law
- Ballistic Knives: Legal under SD law
- Federal Interstate Ban: Switchblade/ballistic knives face interstate commerce restrictions
State-Specific Legal Knives
- Gravity/Balisong Knives: Legal under state law unless used with unlawful intent
- Assisted-Opening Knives: Treated as ordinary folders
- Concealed/Disguised Knives: Generally lawful absent unlawful intent; location bans still apply
Generally Legal Knives
- Pocket/Folding Knives: No statewide length limit; common carry lawful
- Fixed/Utility Knives: Lawful to own/carry; avoid restricted locations
Carry Restrictions
- Concealed Carry: No blanket ban on concealed knives; unlawful intent or restricted places triggers liability
- Open Carry: Generally lawful
- Restricted Locations: Schools, county courthouses, Capitol (unless permitted exceptions)
Local Ordinance Preemption
- Preemption Status: No statewide preemption for knives; check city/county rules
Significant Differences from Gun Laws
- Local Variance: Knife laws may vary locally despite firearm preemption
- School/Courthouse Rules: “Dangerous weapon” definitions can encompass knives in these locations