US Gambling Regulation Timeline: From the Wire Act to 2026

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There is no single US gambling law. What you can legally play depends on the state you are standing in, on a handful of federal statutes written long before smartphones, and on court rulings that keep shifting the line between them. That is why an online casino can be fully licensed in New Jersey and illegal a few miles away in New York.

This timeline follows US gambling regulation from Nevada’s 1931 law to the court fights of October 2026. Each date below comes from a law, court record or regulator notice, or from trade press where we could not find an official record, and the notes in the infographic show which is which.

1931 to 1992: Federal foundations

For most of the 20th century, legal casino gambling meant Nevada. The state legalized wide-open gaming in 1931, during the Depression, and left licensing to counties at first. Everywhere else, casinos were illegal, and illegal bookmaking was a target for federal law enforcement.

Congress responded to organized crime in 1961 with the Wire Act. It makes it a crime for a betting business to use phone lines, and later the internet, to take bets or send betting information across state lines. The law was written for telephone bookmakers, but it still shapes the modern market: every legal online bet in the US must stay inside the state where the player is located, which is why licensed apps check your location.

Key fact

The 1961 Wire Act makes it a federal crime for a betting business to take bets across state lines by wire. It is still the reason every legal online bet in the US must stay inside one state.

New Jersey became the second casino state after voters approved Atlantic City casinos in 1976, and the first casino opened in 1978. In the late 1980s, tribal gaming grew after the Supreme Court ruled in California v. Cabazon that states could not regulate gaming on tribal land when they allowed similar games elsewhere. Congress answered with the Indian Gaming Regulatory Act in 1988, which created the compact system that tribal casinos still use today.

The phase closed with PASPA in 1992. Instead of banning sports betting directly, it barred states from authorizing it, with exceptions for states such as Nevada that already had legal sports betting. For the next 26 years, a full sportsbook was something you could only find legally in Las Vegas.

1994 to 2012: The early internet and the crackdown

When the internet arrived, offshore operators moved quickly. Sportsbooks and casinos licensed in the Caribbean and elsewhere took bets from Americans with no US license, no state oversight and no local way to complain if a payout never arrived. Federal prosecutors used the Wire Act against some of them; in 2001 an appeals court upheld the conviction of an Antigua bookmaker who took bets from New York.

Congress tried a different tool in 2006. The Unlawful Internet Gambling Enforcement Act, attached to a port security bill, does not make any bet illegal by itself. Instead, it stops gambling businesses from accepting payments for bets that are already illegal under state or federal law. Banks and card networks had to block those payments, and the rules became mandatory in 2010.

Key fact

UIGEA did not make any bet illegal by itself. It stopped gambling businesses from accepting payments for bets that were already illegal under state or federal law.

The biggest blow came on April 15, 2011, which poker players call Black Friday. Federal prosecutors in Manhattan charged the founders of the three largest online poker sites serving US players, seized their domain names and froze bank accounts. The sites stopped real-money play for Americans, and many players waited more than a year for a settlement that let them reclaim their balances.

For players, the lesson of this period still applies. Offshore sites can disappear, freeze funds or change terms, and no US regulator can help you get your money back.

2011 to 2017: States open the door

The turning point came from an unexpected place. In 2011, New York and Illinois asked the Justice Department whether selling lottery tickets online would break the Wire Act. The Office of Legal Counsel answered that the Wire Act covers sports betting only. If a bet on a slot or a poker hand did not fall under the Wire Act, states could license those games online as long as everything stayed inside their borders.

Key fact

In 2011 the Justice Department said the Wire Act only covers sports betting. States read it as a green light for in-state online casino and poker.

Three states moved within two years. Delaware put online casino games under its state Lottery, Nevada changed its online poker law so it could share player pools with other states, and New Jersey legalized online casino games run through its Atlantic City casinos. Nevada’s first legal poker site went live in April 2013, and New Jersey and Delaware followed with full online casinos late that year.

Pennsylvania joined in 2017 with Act 42, a large law that covered online slots, table games and poker, and also legalized sports betting on the condition that the federal ban fell. That condition was met less than a year later.

2018 to 2021: Sports betting goes legal

On May 14, 2018, the Supreme Court decided Murphy v. NCAA. The case came from New Jersey, which had fought for years to allow sports betting at its casinos and racetracks. The Court held that PASPA violated the Constitution because Congress cannot order states to keep a ban on their books. You can read the case record on the Supreme Court’s docket page.

Key fact

On May 14, 2018 the Supreme Court struck down PASPA in Murphy v. NCAA. Since then, every state decides for itself whether to legalize sports betting.

The effect was immediate. Delaware launched full sports betting three weeks later, New Jersey passed its law in June 2018, and other states followed year after year. Most states chose to license mobile apps rather than only retail counters, which is why most legal betting now happens on phones.

There was one scare along the way. In late 2018 the Justice Department issued a new opinion saying most of the Wire Act covers all gambling, not just sports. That would have threatened state online casinos and lottery sales. New Hampshire’s lottery sued, and in January 2021 the First Circuit Court of Appeals ruled that the Wire Act applies to sports betting only. State online casinos and lotteries kept operating.

Online casinos spread more slowly than sportsbooks. Pennsylvania opened in July 2019, West Virginia in July 2020, Michigan in January 2021 and Connecticut in October 2021. In each case, the state limited licenses to existing casinos, tribes or the state lottery, and players had to be 21 and physically in the state.

2022 to 2025: Expansion and prediction markets

Sports betting reached the biggest markets in this period. New York’s mobile launch in January 2022 drew close to $2 billion in bets in its first month, according to the Governor’s office. Ohio launched on January 1, 2023, Massachusetts in March 2023 and North Carolina in March 2024.

Online casinos did not keep pace. Rhode Island became the seventh online casino state on March 1, 2024, with the state Lottery as operator and Bally’s as its only vendor. No other state opened an online casino between 2022 and 2025.

A new type of product appeared next to licensed sportsbooks. Prediction markets, such as Kalshi, offer event contracts on federally regulated exchanges supervised by the Commodity Futures Trading Commission, not by state gaming regulators. In September 2024, a federal judge ruled that the CFTC could not block Kalshi’s election contracts, and in May 2025 the CFTC dropped its appeal. Operators then expanded into sports contracts, which look much like sports bets to many players and to many state regulators.

For players, the difference matters. A state-licensed sportsbook follows that state’s rules on age, self-exclusion and complaints. A prediction market follows federal commodities rules instead, and whether states can regulate it is still being decided in court.

2025 to 2026: Sweepstakes bans and the prediction market fight

Sweepstakes casinos had grown fast by using a two-coin model: one currency for fun play and another that can be redeemed for prizes. States that never legalized online casinos began to treat the model as unlicensed gambling. Montana passed a ban in May 2025, followed by New Jersey and Connecticut, then California with AB 831 and New York in December 2025. Indiana, Maine, Tennessee, Louisiana and Oklahoma acted in 2026. Our news report on the Oklahoma sweepstakes casino ban explains what changes there from November 1, 2026.

Legal sports betting kept growing. Missouri launched retail and online sportsbooks on December 1, 2025. Two other states passed laws that are not live yet: Maine’s law giving the Wabanaki Nations exclusive online casino rights took effect in January 2026 but faces a lawsuit, and Wisconsin’s April 2026 law on tribal online sports betting still needs compact changes and federal approval.

The prediction market fight moved to the courts and to Washington. Federal appeals courts have split: the Third Circuit sided with Kalshi in a New Jersey case, while the Ninth and Sixth Circuits ruled against it in cases from Nevada, Ohio and Tennessee. On October 19, 2026, the CFTC published an interim final rule stating that state-licensed sportsbook bets and casino games are not swaps, alongside a proposal to define event contracts as swaps. Our coverage of the CFTC swap rules covers what the agency changed and why state regulators object.

States kept pushing back. Utah, where the state constitution bars gambling, sued Kalshi in state court on October 20, 2026; read our report on Utah’s lawsuit against Kalshi. New Jersey has asked the Supreme Court to hear its case. In the same month, New Jersey also made data-driven responsible gaming rules mandatory for online operators, which we cover in New Jersey’s new responsible gaming rules.

Where US gambling stands today

Online casinos: Seven states have legal, live real-money online casinos: New Jersey, Pennsylvania, Michigan, West Virginia, Connecticut, Delaware and Rhode Island. Maine has passed a law but has no live sites. In every one of these states you must be 21 and physically inside the state to play. Our guide to real money online casinos covers the licensed options.

Online sports betting: 31 states and the District of Columbia have statewide online or mobile sports betting, according to our October 15, 2026 check. A few other states allow sports betting only in person, for example at casinos or on tribal land.

Key fact

As of October 15, 2026, real money online casinos are live in 7 states, and online sports betting in 31 states plus the District of Columbia.

Sweepstakes casinos: Ten states have passed laws against online sweepstakes casinos: California, Connecticut, Indiana, Louisiana, Maine, Montana, New Jersey, New York, Tennessee and Oklahoma, where the ban applies from November 1, 2026. Several other states block the model under existing law or through regulator action. Our page on sweepstakes casinos explains how they work and where brands are restricted.

Prediction markets: Event contracts on CFTC-regulated exchanges are available in many states, but their legal status is disputed. Several states have sent cease-and-desist orders or filed lawsuits, federal appeals courts disagree, and the Supreme Court has not taken a case as of October 2026.

What to watch next

These items are scheduled or pending. None of them is decided yet.

• November 1, 2026: Oklahoma’s SB 1589 is reported to take effect,, and at least two sweepstakes brands have published dates for leaving the state.
• November 3, 2026: Nebraska voters decide on Initiatives 440 and 441, which would allow online sports betting through the state’s racetrack casinos. See our report on Nebraska’s online sports betting ballot measures.
• November 18, 2026: The comment period closes on the CFTC’s interim final rule and on its proposal to define event contracts as swaps.
• Pending: New Jersey’s petition asking the Supreme Court to hear its Kalshi case, and Kalshi’s appeal of Utah’s federal court win in the Tenth Circuit.
• Pending: Maine’s online casino launch, which has no date, and Wisconsin’s online sports betting, which still needs compact amendments and federal approval.

US gambling regulation FAQ