Polymarket US has filed a federal lawsuit against Ohio officials, arguing that the state’s online sports betting rules unlawfully discriminate against interstate commerce. The company is challenging Ohio’s licensing requirements and enforcement actions, which it says threaten its ability to offer federally regulated sports event contracts.
The case, QCX LLC v. Wilson et al., was filed on October 16, 2026, in the U.S. District Court for the Southern District of Ohio under case number 2:26-cv-01502. The constitutional challenge was publicly reported on October 20, days after Ohio’s deadline for prediction market operators to stop offering sports contracts.
QCX LLC, which operates as Polymarket US, runs a prediction market regulated by the Commodity Futures Trading Commission (CFTC). Its lawsuit challenges conditions Ohio imposes on operators seeking online sports betting licenses.
Under the state’s licensing framework, operators must maintain servers within Ohio and establish a local corporate presence to obtain licenses from the Ohio Casino Control Commission, according to Deadspin.
Polymarket argues these requirements violate the Dormant Commerce Clause, a constitutional principle that restricts states from discriminating against or unduly burdening interstate commerce.
The company describes the rules as “unlawful protectionism,” claiming they favor businesses with an established presence in Ohio and restrict participation by companies operating across state borders.
Polymarket is seeking an injunction to prevent Ohio officials from enforcing state gambling laws against its sports event contracts. The company argues that enforcement would cause imminent and irreparable harm.
The Ohio lawsuit combines two legal arguments. Polymarket maintains that federal commodities law gives the CFTC exclusive authority over its event contracts while also challenging the constitutionality of Ohio’s licensing requirements.
The second argument introduces another dimension to the legal disputes surrounding prediction markets. Rather than focusing exclusively on whether federal law overrides state gambling regulations, Polymarket also questions whether Ohio can impose licensing conditions that allegedly discriminate against interstate commerce.
The case follows a setback for prediction market operators in the Sixth Circuit Court of Appeals.
On September 25, the court upheld a decision denying Kalshi preliminary relief against Ohio’s gambling enforcement. It also vacated an injunction Kalshi had obtained in Tennessee.
The appeals court concluded that Kalshi had not established that its sports event contracts qualified as swaps under the relevant federal framework. It also rejected the company’s preemption argument, finding that federal law would not displace the states’ gambling restrictions even if the contracts qualified as swaps.
Polymarket US is represented by Gibson, Dunn & Crutcher, a law firm previously involved in efforts to overturn the federal sports betting ban known as PASPA.
The firm advised former New Jersey Governor Chris Christie during the state’s campaign to legalize sports betting between 2012 and 2018.
The lawsuit follows Ohio’s latest enforcement action against prediction market operators.
On October 2, Governor Mike DeWine and Ohio Casino Control Commission Chair Thomas Stickrath sent cease-and-desist letters to 10 companies offering sports event contracts.
The recipients included Polymarket, Coinbase, Robinhood, Underdog and Novig.
Operators were given until October 16 to stop offering sports contracts in Ohio. The regulator warned that continued activity could result in civil penalties linked to revenue generated from the contracts.
However, most platforms remained accessible when the deadline arrived, according to reporting from News 5 Cleveland and the Ohio Capital Journal.
“The law is on our side, and they’ve lost up to this point,” Ohio Attorney General Andy Wilson told News 5 Cleveland.
Governor DeWine also rejected the distinction between sports event contracts and traditional wagering, stating: “This is pure and simple gambling.”
Ohio officials maintain that platforms offering sports-related contracts should comply with the state’s gambling regulations, while prediction market operators argue that their products fall under federal derivatives oversight.
The federal court has not ruled on Polymarket’s constitutional challenge or granted the requested injunction.
The dispute raises questions about whether states can require federally regulated prediction market operators to obtain local sports betting licenses and whether those licensing conditions unlawfully restrict interstate commerce.
Ohio’s licensed sportsbooks operate under a framework that includes a 20% tax on sports wagering revenue and a minimum customer age of 21.
Prediction market exchanges operate under a different federal regulatory structure and are not licensed as Ohio sportsbooks. However, that distinction does not mean they operate without age restrictions or other compliance obligations.
Polymarket also faces legal challenges elsewhere in the United States, including separate proceedings involving New York’s efforts to regulate sports event contracts as gambling.
For now, the Ohio lawsuit adds a constitutional challenge to the growing number of disputes over state gambling laws and federal oversight of prediction markets. Its outcome remains uncertain, with no final ruling on the legality of Ohio’s requirements as applied to Polymarket US.
Vladimir is a senior iGaming writer and editor, adept at breaking down the key details of crypto casinos and sportsbooks so players don’t have to, delivering honest, player-focused information that actually matters.
