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Polymarket Sues Ohio Over Sports Betting Licensing Rules in Federal Court

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Altay Celikkaya

Content Manager

Updated: 21/10/26

Reading Time: 3 minutes

Polymarket US has filed a federal lawsuit challenging Ohio’s sports betting licensing requirements, arguing that the state’s restrictions unlawfully interfere with federally regulated prediction markets. Filed on 16 October 2026 in the US District Court for the Southern District of Ohio, the complaint names Attorney General Andy Wilson and officials from the Ohio Casino Control Commission (OCCC).

The lawsuit follows an enforcement warning directing Polymarket to stop offering sports event contracts without a state gambling licence. The company is seeking court protection against potential enforcement action.

Polymarket challenges Ohio sports betting rules in federal court, with Ohio flag in background.

Regulation & Compliance

Key Takeaways From Polymarket's Ohio Lawsuit

Polymarket filed its lawsuit on 16 October 2026, the deadline Ohio regulators set.
The company challenges state licensing requirements for federally regulated prediction market exchanges.
Ohio requires licensed sportsbook operators to maintain a physical presence and local servers.
The lawsuit follows a September ruling by a federal appeals court against Kalshi.
Polymarket seeks declaratory and injunctive relief, but no court decision has been issued.

Polymarket Challenges Ohio's Sports Betting Licensing Requirements

According to the federal court docket, QCX LLC, operating as Polymarket US, filed its complaint on 16 October under case number 2:26-cv-01502.

The OCCC issued a cease-and-desist letter on 2 October, giving the company 14 days to confirm it had stopped offering sports event contracts without the required licence.

Ohio’s sportsbook framework requires operators to maintain an in-state physical presence, including an operational business location or qualifying sportsbook facility. The state also requires servers accepting wagers to be located in Ohio.

Polymarket argues that these conditions discriminate against interstate commerce and place unconstitutional restrictions on federally regulated exchanges. The company is asking the court to prevent Ohio from applying its gambling licensing requirements to its exchange operations.

Sixth Circuit Ruling Creates a Legal Challenge

The lawsuit follows a September 25 Sixth Circuit Court of Appeals ruling against Kalshi in a separate Ohio and Tennessee dispute.

The appeals court found that Kalshi’s sports event contracts did not qualify as swaps under the Commodity Exchange Act. It also concluded that federal commodities law did not prevent states from enforcing their gambling regulations.

Circuit Judge Julia Smith Gibbons wrote:

It is the states, rather than the federal government, that are best suited to regulate sports betting.

Polymarket is pursuing a narrower argument, distinguishing direct regulation of federally licensed exchanges from state laws governing sports wagering.

Its complaint claims Ohio’s licensing requirements improperly target the operation of a federally regulated exchange.

The dispute differs from the Illinois ruling that granted Kalshi and Coinbase preliminary protection, highlighting ongoing differences in how US courts interpret federal authority.

CFTC Rulemaking Adds Another Regulatory Dimension

The lawsuit also coincides with developments at the Commodity Futures Trading Commission (CFTC). On 19 October, an interim final rule excluding casino-style gambling products from the federal swap definition took effect.

Separately, the CFTC published a proposal addressing the classification of event contracts involving sports, politics and other outcomes. The proposed inclusion of event contracts remains subject to public consultation and has not become a final rule.

These developments follow the CFTC’s earlier review of event contract regulations. For prediction market operators, the Ohio dispute raises questions about whether federal exchange authorisation limits state licensing requirements.

No injunction has been granted in Polymarket’s new case. The outcome remains uncertain as courts continue examining the boundary between derivatives trading and sports betting regulation.