Are Prediction Markets Legal in Connecticut?
Last updated September 27, 2026. Snapshot — not legal advice.
As of September 27, 2026, the legality of prediction markets in Connecticut is unresolved — litigation is ongoing with no final ruling yet.
Litigation affecting Connecticut
United States v. State of ConnecticutThe United States and the CFTC moved for a preliminary injunction on September 11, 2026 (ECF 102), the day after Connecticut’s cease-and-desist orders to nine more platforms.
Preliminary-injunction motion filed (September 2026)
Connecticut cease-and-desist letters (December 2025)Connecticut’s consumer-protection regulator ordered Kalshi, Robinhood and Crypto.com to stop offering sports event contracts in the state (December 2, 2025), triggering the platform suits and then the federal preemption suit against Connecticut.
Ripened into a state enforcement action
KalshiEX LLC v. CafferelliJudge Oliver denied Kalshi a preliminary injunction (August 2026); Kalshi appealed the same day.
Injunction denied; on appeal (2d Cir.)
State of Connecticut v. KalshiEX LLCConnecticut sued Kalshi directly (August 2026), converting its earlier cease-and-desist into an enforcement action.
Removed; remand motion pending
Coinbase Financial Markets, Inc. v. TongJudge Oliver denied Coinbase a preliminary injunction (August 2026) on the same day and the same reasoning as the parallel Kalshi denial, then denied an injunction pending appeal.
Injunction denied; on appeal (2d Cir.)
Connecticut cease-and-desist orders to nine platforms (September 2026)Connecticut ordered nine more platforms to stop offering sports event contracts (September 10, 2026) and issued about thirty subpoenas to vendors, app stores and media organizations.
Orders issued; first platform suit filed
Underdog Exchange DCM, Inc. v. TongUnderdog sued Connecticut’s Attorney General and consumer-protection regulators (September 15, 2026) days after receiving one of the state’s new cease-and-desist orders.
Filed; no ruling
Which platforms are available in Connecticut?
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 | Status in Connecticut | Source |
|---|---|---|
| Kalshi | Offered here, per the platform’s own availability list | Platform’s list |
| Polymarket (international) | Unavailable here | Platform’s list |
| DKeX (DraftKings Predictions) | Financial markets only | Platform’s list (archived Sep 16) |
| Underdog (Underdog Predict) | Offered here, per the platform’s own availability list | Platform’s list |
| Novig | Offered here, per the platform’s own availability list | Platform’s list |
Sports betting & gambling in Connecticut
Legalized 2021; retail and online launched October 2021 The market is regulated by the Connecticut Department of Consumer Protection (Gaming Division). Tribal gaming: Significant (Mashantucket Pequot and Mohegan tribes anchor the market).
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.