Is Polymarket legal in Missouri?

Yes, but contested: Polymarket's sports contracts face an open dispute in Missouri, with no restriction in force. Missouri's Attorney General sent Polymarket US (QCX LLC) a cease-and-desist letter dated September 16, 2026, calling its sports contracts unlicensed sports wagering. It gave the exchange 30 days to stop or get a Missouri Gaming Commission license. Polymarket US has not sued, and no court order is in force.

Updated Oct 19, 2026 · not legal advice

Reviewed by Vardan Khachatryan · Oct 19, 2026

The short answer

Yes, but contested: Polymarket's sports contracts face an open dispute in Missouri, with no restriction in force.

Missouri Attorney General cease-and-desist letter to QCX Limited Liability Company (Sep 16, 2026) – source

What you can trade from Missouri

Everything Polymarket lists nationally, including sports contracts: no restriction on them is in force in Missouri while the dispute continues. Other venues here: Kalshi (disputed), Robinhood (disputed), DraftKings (not covered), FanDuel (not covered).

What Missouri's regulator has said

Sep 16, 2026
cease and desist · openMissouri's Attorney General ordered Polymarket US (QCX LLC) to stop offering sports wagering to Missourians unless licensed by the Missouri Gaming Commission. She asked it to confirm compliance within 30 days, by October 16, 2026.
Source

Change log

Oct 19, 2026
Current statusYes, but contested: Polymarket's sports contracts face an open dispute in Missouri, with no restriction in force. It rests on Missouri Attorney General cease-and-desist letter to QCX Limited Liability Company (Sep 16, 2026).
Sep 16, 2026
cease and desist (open)Missouri's Attorney General ordered Polymarket US (QCX LLC) to stop offering sports wagering to Missourians unless licensed by the Missouri Gaming Commission. She asked it to confirm compliance within 30 days, by October 16, 2026.

How this compares to Missouri sports betting

Where a state allows sports betting, sportsbooks are licensed and taxed by that state; an event contract on a federal exchange is neither, which is the whole dispute. The Missouri action concerns Polymarket's sports contracts. Whether a state may enforce at all is the question the federal appeals courts have split on. Missouri is outside the Third, Sixth and Ninth Circuits, the three appeals courts that have ruled. The question is unresolved there. Litigation tracker

Common questions

Is Polymarket legal in Missouri?

Yes, but contested: Polymarket's sports contracts face an open dispute in Missouri, with no restriction in force. Missouri's Attorney General sent Polymarket US (QCX LLC) a cease-and-desist letter dated September 16, 2026, calling its sports contracts unlicensed sports wagering. It gave the exchange 30 days to stop or get a Missouri Gaming Commission license. Polymarket US has not sued, and no court order is in force.

Can I still use Polymarket in Missouri for non-sports markets?

Yes. The Missouri dispute concerns sports contracts only.

Is this legal advice?

No. It summarises public rulings and actions, each cited. For a decision that matters, ask a lawyer licensed in the state.