Online gambling is legal in the US, but only in some states and only for some activities. Seven states let you play a full online casino from your phone, more than 30 states plus Washington, D.C. allow mobile sports betting, and many others permit narrower categories like online lottery tickets, horse racing wagers, or daily fantasy sports. The rest prohibit it. What matters is the state you’re physically standing in when you place the bet, not the state on your ID or the state where the website is based.
States Where Online Casino Games Are Legal
As of early 2026, seven states allow the full range of online casino play, including slots, table games, and live dealer options: Connecticut, Delaware, Michigan, New Jersey, Pennsylvania, Rhode Island, and West Virginia. Games on these platforms use random number generators audited by independent testing labs, and each state’s gaming commission sets rules on payout percentages and player fund protections.
Online poker is authorized in those same seven states. Because any one state’s player pool can be thin, Delaware, Michigan, Nevada, New Jersey, and West Virginia have joined the Multi-State Internet Gaming Agreement, which lets players in member states share poker rooms. That matters in poker, where you need other players rather than just a game algorithm.
States Where Online Sports Betting Is Legal
Mobile sports betting has expanded much faster than online casinos. More than 30 states plus Washington, D.C. now allow it. The specifics vary: some states route all betting through a single operator tied to the state lottery, while others issue multiple commercial licenses. College betting rules differ too. A handful of states prohibit wagers on in-state college teams or ban certain bet types like player props on college games. Before you download an app, check what your state actually permits.
Other Legal Forms of Online Wagering
Several categories sit outside the casino and sportsbook headlines. Many states sell lottery tickets and instant-win games through official lottery apps. Parimutuel horse racing wagers have been placed remotely through advance deposit wagering accounts for years. Daily fantasy sports contests operate in most states under frameworks that treat them as games of skill; the federal UIGEA exempts fantasy contests whose outcomes are determined predominantly by accumulated statistical results of real sporting events, though individual states still regulate them.
Tribal Sportsbooks and Casino Apps
Native American tribes operate under the Indian Gaming Regulatory Act of 1988, which requires most casino-style games and sports betting (Class III gaming) to take place on Indian lands under a tribal-state compact. Some states have handled mobile betting by writing compact language that treats a wager placed anywhere in the state as occurring where the tribe’s servers sit on tribal land. If you’re using a tribal sportsbook app, the legal mechanism is different from a commercially licensed book, even though the experience on your phone looks the same.
The Federal Laws That Still Matter
The Wire Act
The Federal Wire Act of 1961 makes it a federal crime for anyone in the business of betting to knowingly use a wire communication to transmit bets or wagering information across state or national borders. Penalties for operators can reach two years in prison and fines up to $250,000.1Office of the Law Revision Counsel. 18 USC 1084 – Transmission of Wagering Information; Penalties2Office of the Law Revision Counsel. 18 USC 3571 – Sentence of Fine The law targets operators and businesses, not individual bettors.
In January 2021, the First Circuit Court of Appeals ruled the Wire Act’s prohibitions are limited to sports betting, and the Department of Justice did not appeal. States have since operated with confidence that offering online casino games and poker within their borders does not violate the Wire Act, as long as the transmissions stay intrastate.
The Unlawful Internet Gambling Enforcement Act
The UIGEA of 2006 attacks online gambling from the money side. It makes it a federal crime for gambling businesses to knowingly accept payments connected to unlawful internet gambling, with operators facing up to five years in prison.3Federal Trade Commission. Unlawful Internet Gambling Enforcement Act4Office of the Law Revision Counsel. 31 USC 5366 – Criminal Penalties It also forces card networks, ACH systems, wire services, and money transmitters to block transactions tied to illegal online gambling.5FDIC. Unlawful Internet Gambling Enforcement Act of 2006 That’s why credit card deposits sometimes get declined on gambling sites, including legal ones, when a processor’s filters are cautious.
Importantly, the UIGEA defines “unlawful internet gambling” by reference to the underlying state or federal law. If a state has legalized online gambling and the platform is properly licensed, transactions on that platform are not unlawful under UIGEA.
Minimum Age to Gamble Online
Most states set the minimum age at 21, but it’s not universal. Some states allow online sports betting at 18, typically where the state lottery runs the sportsbook. The age that applies is the one in the state where you’re physically located when you place the bet, not the state on your ID. Even where state law allows 18, some operators enforce a 21-and-over policy on their own platforms. If you’re between 18 and 20, check both your state’s law and the specific operator’s terms.
How Platforms Confirm You’re in a Legal State
Every licensed platform has to confirm two things before you can wager: who you are, and where you are. These are licensing requirements, not optional features.
Location checks use geofencing that combines GPS, Wi-Fi signals, and cellular triangulation. If you’re across a state line in a jurisdiction that hasn’t legalized the activity, the software blocks the bet. The check runs in real time throughout your session, not just at login. People living near state borders regularly run into problems when a signal bounces to the wrong side.
Identity checks follow Know Your Customer protocols. When you open an account, the operator collects your name, date of birth, address, and Social Security number. Many require a photo of a government-issued ID, and some use selfie-matching to compare your face against it. Your information is checked against self-exclusion registries, sanctions lists, and databases flagging people barred from gambling, such as certain casino employees and athletes connected to the sports in play.
Taxes on Online Gambling Winnings
Every dollar you win online is taxable income under federal law, whether or not the platform sends you a tax form. Starting in 2026, operators must issue a Form W-2G when gambling winnings meet or exceed $2,000, a threshold that now adjusts annually for inflation.6Internal Revenue Service. Instructions for Forms W-2G and 5754 For sports betting and parimutuel wagers, reporting kicks in when winnings are at least 300 times the amount wagered and also meet the $2,000 minimum.
When a single payout tops $5,000 after subtracting the wager and meets the 300-to-1 ratio, the operator withholds 24% for federal tax before paying you.7Internal Revenue Service. Instructions for Forms W-2G and 5754 – Rev. January 2026 That’s an estimated payment, not your final bill. Depending on your bracket, you might owe more or get some back when you file.
You can deduct gambling losses to offset winnings, but only if you itemize on Schedule A, and the deduction can’t exceed the gambling income you report. You need documentation: a log of wins and losses plus receipts, account statements, or tickets showing amounts.8Internal Revenue Service. Topic No. 419, Gambling Income and Losses Online platforms usually offer downloadable transaction histories, which makes this easier than tracking paper. Many states also tax gambling winnings at their ordinary income tax rates on top of federal.
What About Offshore Gambling Sites?
Offshore sites without state licenses are easy to find, and millions of Americans use them. Federal law does not typically target individual bettors on those platforms. The UIGEA targets operators and the financial institutions processing their transactions, and federal criminal enforcement focuses on the businesses running illegal books, not their customers.9Federal Bureau of Investigation. Great Odds, High Risk: The FBI Encourages US Bettors to Know the Risks of Illegal Gambling Some states classify placing a bet with an unlicensed operator as a misdemeanor, though prosecutions of individual bettors are rare.10FDIC. Unlawful Internet Gambling Enforcement Act Examination Guidance and Procedures
The bigger risk is practical. Offshore sites sit outside the jurisdiction of U.S. courts and state gaming commissions. If one refuses to pay your winnings, manipulates outcomes, or loses your personal data, you have essentially no legal recourse. You can’t sue in an American court to recover funds from a company based in Curaçao or Costa Rica. These platforms also skip the anti-money laundering protocols and audits that licensed operators undergo. Where a legal option exists in your state, the unlicensed shortcut rarely justifies the risk.