Three companies got a letter from Connecticut in December 2025 telling them to stop. Polymarket wasn't one of them. That single fact gets recycled into "Polymarket is fine here" more than any other detail on this page, and it's the wrong read — Connecticut just went after its highest-profile targets first.
Is Polymarket Legal in Connecticut? Start With Who Got the Letter
Connecticut's sports-betting market runs through exactly three licensed doors: DraftKings, tied to the Mashantucket Pequot Tribe and Foxwoods; FanDuel, tied to the Mohegan Tribe and Mohegan Sun; and PlaySugarHouse, run by the Connecticut Lottery Corporation with Rush Street Interactive. That structure came out of a May 2021 law letting Governor Ned Lamont renegotiate the tribal compacts to add sports betting, iGaming and online lottery. The Department of Consumer Protection's Gaming Division licenses all of it and enforces Conn. Gen. Stat. § 53-278b, the state's gambling statute, plus CUTPA, its unfair-trade-practices law.
On December 3, 2025, DCP used that authority against three prediction platforms — Kalshi, Robinhood Derivatives and Crypto.com — ordering them to stop offering sports event contracts to Connecticut residents. The department's consumer protection commissioner said only licensed entities may offer sports wagering in the state, and that none of the three held a license, adding that the contracts had reached users under 21. Polymarket ran the same kind of contract and wasn't named.
A judge sided with the state, which is rare. Kalshi sued DCP almost immediately. U.S. District Judge Vernon D. Oliver denied Kalshi's emergency injunction and ruled the sports contracts weren't "swaps" — meaning no automatic CFTC shield. That's close to the opposite of what a Third Circuit panel found months later in Kalshi's New Jersey case. Two federal courts, two readings, same underlying product. On April 2, 2026, the CFTC and DOJ sued Connecticut directly to try to flip that result statewide — a fight still open as of this writing.
Why Wasn't Polymarket on the December List?
DCP didn't explain its sequencing publicly, and there's no Connecticut filing that says Polymarket is exempt from § 53-278b. What exists instead is silence on this one brand, in a state that has shown it will issue the letter when it decides to. Attorney General William Tong has taken the broader route since then — joining Utah's AG in asking Congress to legislate against offshore prediction platforms marketing to people under 21, a category argument, not a brand-specific one.
What Connecticut's own numbers say, August 2026:
- Comptroller Sean Scanlon's monthly economic report names Kalshi, Polymarket US and smaller platforms directly in a section on prediction markets
- More than $100,000 was wagered on Connecticut's August 11, 2026 primary elections through these platforms
- A cited Wall Street Journal analysis found 0.1% of accounts captured 67% of platform profits
- Connecticut collected over $110 million in tax revenue from licensed sports betting and iGaming in 2025 — whether prediction markets are pulling from that base isn't yet visible in the state's data
Is Polymarket Legit and Safe in Connecticut?
Legit, nationally: Polymarket US (QCX LLC) is a CFTC-designated exchange running KYC accounts and dollar settlement, and nothing DCP or the comptroller's office has published accuses it of a bad payout — the arguments on the table are about licensing and youth marketing, not fraud. Safe, in Connecticut specifically: no. The state built age verification, licensing oversight and consumer protection into DraftKings, FanDuel and PlaySugarHouse. None of that framework currently reaches Polymarket, and the comptroller's own report — a state government document, not an advocacy group — is the one saying so.
None of this is a way to make money, whichever rail you're on or whichever letter did or didn't arrive. 21+ only, and if it stops feeling like a choice, 1-800-GAMBLER is free and confidential.