Are Prediction Markets Legal in Missouri?

Last updated September 27, 2026. Snapshot — not legal advice.

As of September 27, 2026, the legality of prediction markets in Missouri is unresolved — litigation is ongoing with no final ruling yet.

Prediction markets in Missouri

Contested — cease-and-desist letters, no suit yet
Missouri moved for the first time in September 2026. Attorney General Catherine L. Hanaway sent cease-and-desist letters dated September 16 and 17 to Kalshi, Polymarket, Crypto.com, Robinhood, Novig and Underdog, calling their sports event contracts unlicensed sports wagering and demanding they stop, or be licensed by the Missouri Gaming Commission and pay its 10% wagering tax. Each letter gives thirty days and says the State will sue otherwise; the windows close October 16 and 17. No lawsuit has been filed by either side.

Litigation affecting Missouri

Missouri Attorney General cease-and-desist letters (September 2026)Missouri’s Attorney General gave six platforms thirty days to stop offering sports event contracts or be licensed and taxed as sportsbooks (letters dated September 16–17, 2026).
Pre-suit letters; response window running

Which platforms are available in Missouri?

Each platform’s own published availability list, checked September 24, 2026. This table covers the platforms whose complete list we could verify from a primary source: Kalshi, Polymarket (international), DKeX (DraftKings Predictions), Underdog (Underdog Predict), Novig.

Platform availability in Missouri
PlatformStatus in MissouriSource
KalshiOffered here, per the platform’s own availability listPlatform’s list
Polymarket (international)Unavailable herePlatform’s list
DKeX (DraftKings Predictions)Offered, with sports restrictedPlatform’s list (archived Sep 16)
Underdog (Underdog Predict)Offered here, per the platform’s own availability listPlatform’s list
NovigOffered here, per the platform’s own availability listPlatform’s list

Sports betting & gambling in Missouri

Legal — Online & Retail

Amendment 2 passed Nov 2024; live Dec 2025 The market is regulated by the Missouri Gaming Commission. Tribal gaming: not a factor.

The federal-vs-state fight

Every entry in this fight turns on the same question: does a prediction-market platform's federal regulation by the CFTC preempt a state's gambling law, or does the state retain authority to restrict it? Courts around the country are answering that question differently — sometimes for the platform, sometimes for the state — and almost every ruling so far is preliminary and under appeal. Treat this page as a snapshot, not a final word.

This page is informational, not legal advice. Nearly every litigation entry referenced here is a preliminary ruling under appeal. Always verify a platform's current, location-specific eligibility directly with the venue before relying on this page.