Read the docket, not just the statute. Most Polymarket state pages on this site describe an old gambling law that might, in theory, reach event contracts, and a government that hasn't said a word about it either way. Rhode Island isn't that story. Attorney General Peter Neronha sued Polymarket by name in May 2026, the same week he sued Kalshi, and the fallout has since pulled in the federal government too.
Rhode Island Sued Both Companies By Name — That's Rare
On May 21, 2026, after AG Neronha's office met with Kalshi representatives and concluded the platforms were violating state gambling law, Rhode Island filed suit in Superior Court against Kalshi and Polymarket together, asking the court to declare their sports event contracts illegal sports betting and permanently block both. That distinction matters: on most state pages in this series, Kalshi gets the cease-and-desist letter and Polymarket gets a pass. Rhode Island named both from day one.
What Rhode Island is asking for: a declaratory judgment that Kalshi and Polymarket's sports-related event contracts constitute sports betting under RIGL 42-61.2, plus a permanent injunction stopping both platforms from offering them to Rhode Island residents. As of this writing, no court has granted either.
Is Polymarket Legal in Rhode Island? Nobody Knows Yet
Rhode Island's only licensed sports wagering runs through RIGL 42-61.2, which since 2018 has handed the Rhode Island Lottery sole authority over the market, operated by IGT's Sportsbook Rhode Island app at Bally's Lincoln and Tiverton casinos — 51% of revenue to the state, 32% to the operator, 17% to the retail location. That monopoly is already ending on its own terms: Bally's won a license in May 2026 to run a second online sportsbook before IGT's contract expires in November 2026. None of that licensing structure was written with event contracts in mind, which is exactly what Rhode Island's lawsuit is trying to settle by court order instead.
The State's Real Motive: An 8% Revenue Drop
Neronha's complaint isn't shy about the money. It cites a roughly 8% decline in the Lottery's sports-betting handle from 2024 to 2025 and lays it at Kalshi and Polymarket's door — bettors trading event contracts instead of placing bets through the state's single licensed sportsbook, which sends just over half its revenue back to Rhode Island. Whether a judge treats that as legally relevant to the question of whether an event contract counts as “sports betting” under Rhode Island law is a separate question from whether the number is accurate. It reads as the honest reason the state moved when 40-plus other states haven't.
The Rhode Island timeline so far:
- May 20, 2026 — Neronha's office meets Kalshi, signals a violation finding
- May 21, 2026 — Rhode Island sues Kalshi and Polymarket in Superior Court
- Same week — Kalshi countersues in U.S. District Court, D.R.I., citing CEA preemption
- May 29, 2026 — CFTC files its own complaint and moves to intervene against Rhode Island
- June 9, 2026 — deadline for the state's opposition to Kalshi's preliminary-injunction motion
- Rhode Island agrees to pause its state-court case pending the federal outcome
Then the Federal Government Sued Rhode Island Back
On May 29, 2026, the CFTC filed its own complaint and a motion to intervene — not on Kalshi's side of a private dispute, but against Rhode Island directly, arguing the Commodity Exchange Act gives the agency exclusive jurisdiction over the contracts it designates, Polymarket US and Kalshi included, and that no state can regulate them as gambling regardless of what it calls them. Judge Mary S. McElroy is now overseeing a preliminary-injunction fight with the state, Kalshi, and the federal government all as parties. A ruling here could shape how the entire prediction-market fight plays out in every other state suing over the same theory.
Is Polymarket Legit and Safe in Rhode Island?
Legit: nothing in Rhode Island's lawsuit questions whether Polymarket US honors a winning contract — the state's claim is about licensing and lost handle, not fraud, and the CFTC designation and KYC process work the same in Rhode Island as anywhere else. Safe: mechanically, an account still opens today, since no injunction has issued and Rhode Island paused its own case. But being named directly in an active lawsuit, with a federal judge already setting briefing deadlines, is a firmer legal position against the platform than the no-action column most states sit in. The Lottery's consumer-protection framework around SBRI — licensing, self-exclusion, an operator on contract with the state — doesn't extend to Polymarket either way.
Watch Judge McElroy's ruling on the preliminary injunction; it is likely to be the first concrete signal of which way this goes. Until then, an event contract can lose the full stake regardless of who wins the jurisdiction argument — this is not a way to make money. 21+ only; Rhode Island's problem gambling helpline, 1-800-522-4700, is free and confidential.