Polymarket New Jersey: The State That Lost the Landmark Case

Polymarket New Jersey is worth reading closely for one reason: New Jersey is the state that actually lost. Every other state page on this site describes a fight still underway or a platform still on the back foot. New Jersey tried to shut prediction markets down first, in March 2025, and a federal appeals court ruled against it a year later — the first appellate decision anywhere to say the CFTC, not a state gambling law, gets to call the shots. New Jersey is not done fighting. Here is what actually happened, and what is still open.

Legal status in New Jersey

New Jersey legalized sports wagering under the Sports Wagering Act (P.L. 2018, c.33, N.J.S.A. 5:12A-1 et seq.), passed after New Jersey itself won the U.S. Supreme Court case that struck down the federal PASPA ban in 2018. The Division of Gaming Enforcement (DGE) licenses online and retail sportsbooks tied to Atlantic City casinos and the state's racetracks, requires 21+ age verification and in-state geolocation, and — under a state constitutional carve-out — bars wagering on college teams or college events actually held in New Jersey. On March 27, 2025, with the NCAA tournament's East Regional set for Newark, DGE Interim Director Mary Jo Flaherty sent cease-and-desist letters to Kalshi and Robinhood, arguing their March Madness event contracts were unlicensed sports wagering under that statute. Robinhood complied. Kalshi sued instead, in KalshiEX LLC v. Flaherty, and won a preliminary injunction in district court. New Jersey appealed, and on April 6, 2026 a divided Third Circuit panel affirmed, holding 2-1 that Kalshi's sports event contracts are "swaps" under the Commodity Exchange Act and that federal law field- and conflict-preempts New Jersey's gambling statute from reaching them — the first federal court of appeals ruling on the question nationally. Judge Jane Roth dissented, writing the contracts are "virtually indistinguishable" from bets on a licensed New Jersey sportsbook. Polymarket was not the named defendant in Flaherty, but coverage of the ruling describes it as blocking New Jersey's attempted ban on "Kalshi, Polymarket and others" alike, since the holding turns on CFTC designation, not the individual company. New Jersey is not conceding: after the Sixth Circuit ruled the opposite way on a similar Ohio dispute on July 30, 2026, creating a circuit split, Justice Samuel Alito gave New Jersey until August 4, 2026 to petition the U.S. Supreme Court, docketed as Flaherty v. KalshiEX — a shorter deadline than the state wanted, but enough time to frame the petition around the split. Whether the Court takes it is still unresolved.

State gambling authority: New Jersey Division of Gaming Enforcement licenses sports wagering under the Sports Wagering Act; it sent Kalshi and Robinhood cease-and-desist letters in March 2025 and lost the resulting case at the Third Circuit

Most prediction-market legal fights on this site have the platform playing defense. New Jersey is the exception on the other side too: it is the one state whose own cease-and-desist letter got knocked down by a federal appeals court, in the only appellate ruling on this question so far.

March 2025: The Letter That Started It

New Jersey’s Sports Wagering Act carries a quirk written into the state constitution’s own gambling carve-out: no wagering on college teams or college events physically held in New Jersey. With the NCAA tournament’s East Regional set for Newark in late March 2025, DGE Interim Director Mary Jo Flaherty sent cease-and-desist letters to Kalshi and Robinhood on March 27, arguing their March Madness event contracts amounted to unlicensed sports wagering. Robinhood pulled the contracts. Kalshi didn’t — it sued.

Polymarket was never named. The letter, and the lawsuit that followed, targeted Kalshi and Robinhood specifically. Polymarket rides on the outcome because the legal question — does CFTC designation preempt state gambling law — doesn’t turn on which company is asking.

Is Polymarket Legal in New Jersey?

On April 6, 2026, a divided Third Circuit panel affirmed a preliminary injunction against New Jersey, ruling 2-1 that sports event contracts on a CFTC-designated exchange are “swaps” under the Commodity Exchange Act — and that federal law preempts New Jersey from treating them as gambling. It was the first federal appeals court in the country to rule on the question, and it went against the state that filed first. Judge Jane Roth dissented, writing that the contracts are “virtually indistinguishable” from bets placed on a licensed New Jersey sportsbook — a preview of the argument New Jersey is now taking further.

Why New Jersey Is Racing to the Supreme Court

New Jersey didn’t stop at losing. On July 30, 2026, the Sixth Circuit ruled the opposite way in a similar Ohio dispute, handing New Jersey the one thing a certiorari petition needs most: an actual split between circuits. Justice Samuel Alito gave the state until August 4, 2026 — a shorter window than New Jersey asked for — to file, in a case now docketed Flaherty v. KalshiEX. Whether the Court agrees to hear it is unresolved; most analysts covering the filing expect the justices to let the circuit split develop further before stepping in, not to grant review immediately.

Is Polymarket Legit and Safe in New Jersey?

Legit: the strongest legal argument any prediction-market platform has made in court so far is the one that just won in New Jersey, and it wasn’t even Polymarket’s case. Safe: mechanically usable today, protected for now by an injunction the state is actively trying to get reversed. Neither word means New Jersey has approved Polymarket, or that this outcome is final — it means the state that tried hardest to shut prediction markets down is, for the moment, the one that lost.

What This Means If You’re in New Jersey

Right now: Polymarket US is reachable from New Jersey, and the state cannot enforce its original cease-and-desist theory while KalshiEX v. Flaherty is on appeal. That could change if the Supreme Court takes the case and reverses — or it could get more entrenched if the Court declines and the Third Circuit’s holding stands. Watch the cert docket, not the app working today. This isn’t a sportsbook account and it isn’t income — a contract can still expire worthless no matter which court wins. 21+ only, and if it stops feeling like a choice, 1-800-GAMBLER is free and confidential.

Polymarket New Jersey — Frequently Asked Questions

Is Polymarket legal in New Jersey?

On the US rail, functionally yes right now — a federal appeals court ruling in April 2026 held that New Jersey's gambling law cannot reach CFTC-designated sports event contracts, and that holding was not limited to Kalshi by name. But New Jersey is actively petitioning the Supreme Court to reverse it, docketed Flaherty v. KalshiEX, so "legal" here describes the state of a case still being fought, not a settled statute. The international polymarket.com site remains geo-blocked for US IPs, New Jersey included.

Did New Jersey send Polymarket a cease-and-desist letter?

No — the March 27, 2025 cease-and-desist letters from DGE Interim Director Mary Jo Flaherty named Kalshi and Robinhood specifically, tied to March Madness contracts during the NCAA East Regional in Newark. Polymarket was not sent one and was not a party to the resulting lawsuit. It benefits from the Third Circuit's ruling by extension, not because New Jersey ever targeted it directly.

What did the Third Circuit actually rule?

On April 6, 2026, a divided panel ruled 2-1 in KalshiEX LLC v. Flaherty that sports-related event contracts are "swaps" under the Commodity Exchange Act, and that federal law preempts New Jersey from applying its own gambling statute to them — both field preemption (regulation of trading on a CFTC-designated contract market) and conflict preemption. It affirmed a lower court's preliminary injunction against New Jersey, meaning the state still cannot enforce its cease-and-desist while the case continues. Judge Jane Roth dissented, arguing the contracts function exactly like licensed sportsbook bets.

Is New Jersey taking this to the Supreme Court?

It's trying to. After the Sixth Circuit ruled against Kalshi in a similar Ohio case on July 30, 2026 — creating a split between federal circuits — Justice Samuel Alito set New Jersey a deadline of August 4, 2026 to file a certiorari petition, shorter than the state's requested extension. The case is docketed as Flaherty v. KalshiEX. Legal analysts covering the filing expect the Court probably won't take it up immediately given how fresh the circuit split is, but consider it likely to reach the Court eventually given the stakes for the entire prediction-market industry.

Is Polymarket legit in New Jersey?

As a company, yes on the fundamentals: the US arm is a CFTC-designated exchange with KYC accounts and dollar settlement, and the only federal appellate ruling on point so far found that structure entitled to the same protection Kalshi won. New Jersey's objection has always been about which regulator has authority, not that the platform is fraudulent or mishandling funds.

Is Polymarket safe to use from New Jersey right now?

Mechanically, nothing currently blocks a New Jersey resident from opening a Polymarket US account, and the Third Circuit's injunction keeps DGE from enforcing its cease-and-desist theory while the case is live. But "safe" should account for the fact that New Jersey is actively asking the Supreme Court to undo the ruling this rests on, and a state-favorable outcome there could reopen enforcement against every CFTC-designated platform operating here, Polymarket included. This was never a savings product — a contract can expire worthless regardless of which court wins.

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