SD ยท Checked Oct. 21, 2026
Prediction market law in South Dakota
No public action found
South Dakota has taken no direct action against prediction markets but has joined multistate amicus briefs opposing Kalshi.
No South Dakota lawsuit, cease-and-desist, or prediction-market bill was found. The attorney general's office has joined multistate amicus filings that dispute Kalshi's preemption argument, including the June 2026 Sixth Circuit brief supporting Ohio. Deadwood casino interests cited prediction markets in 2026 debate over a failed resolution to put statewide mobile sports betting on the ballot.
Timeline of state actions
Other development, Kalshi
South Dakota joined a 37-state coalition (36 states plus California) that filed an amicus brief in the Sixth Circuit supporting Ohio's enforcement position against Kalshi (date is the coalition announcement).
Laws and bills
No enacted laws or pending bills specific to prediction markets found.
Court cases
No court cases involving South Dakota found.