Has Ohio sued Polymarket US or ordered it to stop?

Yes. Oct. 2, 2026: The OCCC sent cease-and-desist letters to ten firms offering sports event contracts: Polymarket, Novig, Underdog, Coinbase, ProphetX, Robinhood, Gemini Titan, Webull, Plus500US and Moomoo. Recipients were told to confirm compliance in writing by October 16. Kalshi, already in litigation with the state, was not a recipient.

How old do you have to be to use Polymarket US in Ohio?

18. That is Polymarket US's minimum age, and it lists no different rule for Ohio.

Is sports betting legal in Ohio?

Legal online. Online and retail sports betting live since January 1, 2023; minimum age 21.

Which court will decide whether Ohio can regulate Polymarket US?

Federal appeals from Ohio go to the Sixth Circuit, which ruled for the states on Sept. 25, 2026. 3 petitions now ask the U.S. Supreme Court to settle the question nationally.

OH · Polymarket US · Checked Oct. 21, 2026

Is Polymarket US legal in Ohio?

No restriction found Ohio: In litigation

The short answer

Polymarket US does not publish a list of states where it is unavailable, and we found no court order, regulator action or Polymarket US notice that stops it from serving Ohio as of Oct. 22, 2026. After the Ohio Casino Control Commission ordered it to stop offering sports contracts, QCX LLC sued Ohio officials in the Southern District of Ohio on October 16, 2026 (No. 2:26-cv-01502). Polymarket says complying would mean blocking Ohio users. No source confirmed that it has stopped sports contracts in Ohio.

Ohio has 3 public actions on record that name Polymarket US. The latest (Oct. 16, 2026): At the Oct. 16 compliance deadline, most of the ten recipients were still offering sports contracts in Ohio, according to local reporting; Plus500US told the commission it would stop. Gov. Mike DeWine said the state would file lawsuits, and Attorney General Andy Wilson said the state could seek to recover the companies' Ohio revenue.

Federal appeals from Ohio go to the Sixth Circuit, which ruled for the states on Sept. 25, 2026.

Availability: Polymarket App Terms & Conditions (ISV Front End), effective October 22, 2026 (embedded at polymarket.us/tos), checked Oct. 22, 2026. A summary of public actions, not legal advice.

Follow Ohio

Cite this page

Bluebook

Is Polymarket US Legal in Ohio?, Prediction Market Laws (last updated Oct. 22, 2026), https://predictionmarketlaws.com/platforms/polymarket/ohio.

APA

Prediction Market Laws. (2026, October 22). Is Polymarket US Legal in Ohio?. https://predictionmarketlaws.com/platforms/polymarket/ohio

What Ohio has done about Polymarket US

Oct. 16, 2026
Other development
At the Oct. 16 compliance deadline, most of the ten recipients were still offering sports contracts in Ohio, according to local reporting; Plus500US told the commission it would stop. Gov. Mike DeWine said the state would file lawsuits, and Attorney General Andy Wilson said the state could seek to recover the companies' Ohio revenue.
Source: News 5 Cleveland (WEWS)
October 2026
Operator lawsuit
QCX LLC (Polymarket US) sued Ohio officials in the Southern District of Ohio, alleging that Ohio's in-state requirements for sports wagering discriminate against interstate commerce.
Source: DeFi Rate legal tracker
Oct. 2, 2026
Cease-and-desist
The OCCC sent cease-and-desist letters to ten firms offering sports event contracts: Polymarket, Novig, Underdog, Coinbase, ProphetX, Robinhood, Gemini Titan, Webull, Plus500US and Moomoo. Recipients were told to confirm compliance in writing by October 16. Kalshi, already in litigation with the state, was not a recipient.
Source: SBC Americas

All 13 actions in Ohio

Court cases

QCX LLC v. WilsonU.S. District Court for the Southern District of Ohio, 2:26-cv-01502Pending

The legal backdrop in Ohio

State status: In litigationThe state and a prediction market operator are actively in court, and no order blocking the operator is in force.
Online sports betting: Legal onlineOnline and retail sports betting live since January 1, 2023; minimum age 21.
Federal appeals court: Sixth CircuitRuled for the states.
Who regulates: Ohio Casino Control Commission; Ohio Attorney General
Laws and bills: 2 on record

Using Polymarket US in Ohio

Minimum age: 18
Identity checks: Polymarket US requires date of birth, a phone number confirmed by text code, legal name, residential address and Social Security number. Most users are verified automatically; others may be asked for a government-issued ID and a selfie check. KYC must be completed before depositing or trading, and the terms require KYC, AML and sanctions screening. Source

Other platforms in Ohio

KalshiNo restriction found
Polymarket USNo restriction found
Gemini PredictionsNo restriction found
RobinhoodNo restriction found
Crypto.comNo restriction found
CoinbaseNo restriction found
WebullNo restriction found
DraftKings PredictionsSports blocked
FanDuel PredictsSports blocked
UnderdogOffered
PrizePicksSports blocked
Fanatics MarketsNot offered

Questions people ask

Is Polymarket US legal in Ohio?: Polymarket US does not publish a list of states where it is unavailable, and we found no court order, regulator action or Polymarket US notice that stops it from serving Ohio as of Oct. 22, 2026. After the Ohio Casino Control Commission ordered it to stop offering sports contracts, QCX LLC sued Ohio officials in the Southern District of Ohio on October 16, 2026 (No. 2:26-cv-01502). Polymarket says complying would mean blocking Ohio users. No source confirmed that it has stopped sports contracts in Ohio. Ohio has 3 public actions on record that name Polymarket US. The latest (Oct. 16, 2026): At the Oct. 16 compliance deadline, most of the ten recipients were still offering sports contracts in Ohio, according to local reporting; Plus500US told the commission it would stop. Gov. Mike DeWine said the state would file lawsuits, and Attorney General Andy Wilson said the state could seek to recover the companies' Ohio revenue. This summarises public actions; it is not legal advice.
Has Ohio sued Polymarket US or ordered it to stop?: Yes. Oct. 2, 2026: The OCCC sent cease-and-desist letters to ten firms offering sports event contracts: Polymarket, Novig, Underdog, Coinbase, ProphetX, Robinhood, Gemini Titan, Webull, Plus500US and Moomoo. Recipients were told to confirm compliance in writing by October 16. Kalshi, already in litigation with the state, was not a recipient.
How old do you have to be to use Polymarket US in Ohio?: 18. That is Polymarket US's minimum age, and it lists no different rule for Ohio.
Is sports betting legal in Ohio?: Legal online. Online and retail sports betting live since January 1, 2023; minimum age 21.
Which court will decide whether Ohio can regulate Polymarket US?: Federal appeals from Ohio go to the Sixth Circuit, which ruled for the states on Sept. 25, 2026. 3 petitions now ask the U.S. Supreme Court to settle the question nationally.