Polymarket Halts Sports-Event Contracts in Michigan
Mike Goodpaster Published 29/10/2026
Polymarket is the latest prediction market site to bring a halt to its offering of sports-event contracts in the state of Michigan. The Michigan Gaming Control Board (MGCB) announced that Polymarket has agreed to stop offering new sports-related event contracts to Michigan customers. It will close out any remaining open customer positions by the end of the day, Eastern time, on November 25, 2026.
The agreement was negotiated between the state and Polymarket. It is the latest in a series of actions Michigan has taken this year against prediction market operators that are offering sports-event contracts. In exchange for this decision, Michigan will not pursue legal action against Polymarket.
Polymarket is complying with the demands of Michigan's state regulator
Polymarket is following the legal statute approved by the U.S. District Court for the Western District of Michigan. Michigan Attorney General Dana Nessel successfully secured a preliminary injunction in which a judge was in agreement that sports-event contract offerings from prediction market sites are nothing more than illegal sports betting.
Under the terms of the stipulation, Polymarket will cease offering new sports-related event contracts in Michigan. It will also close any open contracts held by Michigan residents that customers have not closed out voluntarily. All of these measures will be completed by the November 25 deadline agreed to by Polymarket.
The state is agreeing not to take any enforcement action against Polymarket as long as the company remains in compliance with this agreement.
Polymarket was originally suing the state of Michigan
In March of 2026, Polymarket sued Michigan state officials in federal court. The prediction market site was seeking to block Michigan from enforcing its gaming laws.
The court denied Polymarket’s request for a temporary restraining order in March. A second motion for a preliminary injunction was denied in June.
Polymarket’s appeal of that ruling is pending before the Sixth Circuit. On September 10, the Michigan Department of Attorney General notified Polymarket that it would take legal action if the company did not cease offering sports-related event contracts to Michigan residents.
Michigan rulemakers are celebrating this victory. Polymarket is another site that they believe is offering illegal, unlicensed sports betting in the state.
“Polymarket ... in stepping back from these unlicensed sports contracts shows that Michigan’s approach is working,” MGCB Executive Director Henry Williams said in a statement. “We expect all operators to respect Michigan’s regulatory framework.
"If you want to offer sports wagering to Michigan residents, you need a Michigan license.”
Four prediction market sites have now halted offering sports-event contracts in Michigan
Michigan has now secured agreements or court orders halting sports-related event contracts from four prediction market sites. That list includes Kalshi, Robinhood, Coinbase, and Polymarket.
Polymarket, Robinhood, and Coinbase all ceased operations voluntarily. Michigan obtained a state-court preliminary injunction against Kalshi.
The Attorney General’s office and the Michigan Gaming Control Board are proving to be relentless in their continuing joint efforts. The combined goal of these groups is to ensure that sports wagering in Michigan is offered only through properly licensed and regulated operators.
“One by one, from Kalshi to Robinhood and Coinbase, and this latest agreement with Polymarket, we’re holding the national sports betting industry accountable to Michigan law,” Michigan Attorney General Dana Nessel said in a statement. “Alongside the MGCB, we’re protecting Michigan residents by ensuring gaming in our state occurs in licensed and regulated ways, and under the protections and safeguards afforded by the law.”