Is sports betting legal in Ohio? Yes for adults 21 and over, but prediction markets face a court fight

Yes. Sports betting is legal in Ohio for adults 21 and over. Online sportsbooks and retail sportsbooks have operated since January 1, 2023, and all of them are licensed by the Ohio Casino Control Commission. DraftKings is one of the licensed operators, and every major sportsbook app is live in the state. Betting with an unlicensed operator, or betting while under 21, is not legal.

The full Ohio guide covers the app lineup and the basics. This story covers what has changed this fall. The shift is not on the sportsbook side. It involves prediction markets, the exchange-style platforms that let users trade on game outcomes, and Ohio has become the Big Ten state where their legal status is most contested.

The court ruling

On September 25, a three-judge panel of the U.S. Court of Appeals for the Sixth Circuit ruled in appeals from Ohio and Tennessee. It held that Kalshi's sports-related event contracts are not "swaps" and do not fall under the exclusive jurisdiction of the Commodity Futures Trading Commission. As VitalLaw reported, the panel also found that even if the contracts were swaps, the Commodity Exchange Act would not preempt Ohio's or Tennessee's gambling laws. The decision deepens a split among federal appeals courts over whether states can regulate this kind of trading. That kind of split often leads to Supreme Court review.

The practical result is that Ohio can apply its gambling laws to sports contracts offered by prediction markets. The commission had already moved in April 2026 to fine Kalshi $5 million for offering sports gaming without a license. The September ruling put the state in a stronger position in that dispute.

Where the platforms stand

As of this site's latest review, Polymarket US does not serve Ohio. Novig, one of the venues that lists sports markets, remains open to Ohio users. Because the law now favors the state, Ohio is the Big Ten state where that is most likely to change. Check the Ohio page before a game day, not after.

Some readers have asked whether Betr or another particular app is legal in Ohio. The answer depends on the product and its license status. Sportsbooks need a license from the Casino Control Commission, and the commission publishes its list of licensed operators. If a sports-wagering product is not on that list, it is not authorized in Ohio.

Rules that matter for Big Ten fans

Ohio's law has a few limits Buckeyes fans run into most often.

• Age: You must be 21 or older. There is no exception for online play.
• Location: You must be physically inside Ohio to place a mobile bet with an Ohio-licensed book. The apps use geolocation to check this.
• College player props: In 2024, at the NCAA's request, the commission barred player-specific prop bets on college games. That covers Ohio State and every other college team. Game lines, totals and futures are still allowed.

For team news, injuries and the Buckeyes' standing in the Big Ten and playoff race, see the Ohio State page.

What to watch next

Three things to watch from here:

• Whether Kalshi asks the full Sixth Circuit or the Supreme Court to review the ruling.
• How the commission enforces its $5 million action against Kalshi.
• Whether Ohio regulators turn to other prediction-market platforms still operating in the state.

Any of these could change which platforms Ohioans can use before the season ends. The sportsbook side, licensed apps for adults 21 and over, is not affected by the case.

If gambling stops being fun, help is available around the clock at 1-800-GAMBLER.