Casinos of the type that operate in Las Vegas and Atlantic City are illegal in California. The state constitution bans them outright. Two exceptions explain why gambling floors still exist in the state: federally recognized tribes run full-scale casinos on tribal land under compacts with the state, and licensed cardrooms host player-versus-player card games without acting as the house. Everything outside those two lanes remains prohibited.
What the Constitution and Penal Code Actually Ban
Article IV, Section 19 of the California Constitution directs the Legislature to “prohibit casinos of the type currently operating in Nevada and New Jersey.” That language was added by Proposition 37 in 1984, the same measure that created the California State Lottery.1Justia. California Constitution Article IV Section 19 – Legislative2Justia. California Government Code – California State Lottery Act of 1984
Penal Code Section 330 does the statutory work. It makes it a misdemeanor to operate or play any “banking or percentage game” using cards, dice, or any similar device for money. A banking game is one where the house has a financial stake in the outcome. Roulette, craps, and traditional blackjack all sit inside that definition. A conviction carries a fine of $100 to $1,000, up to six months in county jail, or both.3California Legislative Information. California Code PEN 330 – Gaming
The Gambling Control Act, at Business and Professions Code Section 19800 and following, layers the regulatory structure on top of the criminal ban. It created the California Gambling Control Commission (CGCC) to oversee legal gaming statewide, with the Bureau of Gambling Control inside the Department of Justice handling investigations and enforcement.4California Gambling Control Commission. California Business and Professions Code – The Gambling Control Act
Why Tribal Casinos Are Legal
The most visible exception is tribal gaming. Federally recognized tribes operate casinos with slot machines, blackjack tables, and other banked games that would be illegal anywhere else in California. Two pieces of law make that possible.
The federal Indian Gaming Regulatory Act of 1988 sets the framework. Under 25 U.S.C. ยง 2710, tribes can offer Class III gaming, which includes slots and banked card games, on tribal lands if they negotiate a compact with the state and the Secretary of the Interior approves it.5Office of the Law Revision Counsel. 25 USC 2710 – Tribal Gaming Ordinances The governor negotiates, the Legislature ratifies, and the federal government publishes the final approval.
Federal authorization alone wouldn’t have been enough. In March 2000, California voters passed Proposition 1A, which amended the state constitution to explicitly allow the governor to negotiate compacts permitting tribes to run slot machines, lottery games, and banked card games on tribal land.6California Secretary of State. California Voter Information Guide – Proposition 1A Gambling on Tribal Lands Without that amendment, tribal casinos would have collided with Article IV, Section 19’s ban.
Compacts generally run about 20 years and then must be renegotiated. They set regulatory standards, labor terms, and revenue-sharing obligations. Some tribes pay into the state’s General Fund; others contribute to the Revenue Sharing Trust Fund, which distributes money to tribes that don’t operate casinos. Oversight is shared across tribal gaming commissions, the CGCC and Bureau of Gambling Control at the state level, and the National Indian Gaming Commission at the federal level.7National Indian Gaming Commission. NIGC Approval of Chicken Ranch Rancheria Amended Gaming Ordinance
Why Cardrooms Aren’t Casinos Under California Law
Cardrooms exist in a separate lane. They aren’t casinos in the constitutional sense because the house never bets against the player. Everyone at the table plays against the other players. The cardroom’s revenue comes from a fee it charges for hosting the game, not from winning or losing money on the outcome.
State law is strict about how that fee is calculated. The fee can’t be a percentage of the pot or of any wager. It has to be set before play begins, and a single table can’t offer more than five different fee tiers. Every player at the same level of participation pays the same amount, and the floor is $0.50 per wager.8Office of the Attorney General – State of California. Regulatory Review of Cardroom Collection Fee Waivers
The CGCC and Bureau of Gambling Control license cardrooms jointly. Applicants go through background checks, financial audits, and suitability reviews that reach owners, key employees, and financial backers.4California Gambling Control Commission. California Business and Professions Code – The Gambling Control Act A state license alone doesn’t open the doors. Cities and counties can block a licensed cardroom through zoning or refuse local operating permits.
Because cardrooms can’t legally bank games, many contract with third-party proposition player services. These independent companies sit at the table and take the bank role in games like California-style blackjack. Tribal gaming interests have argued in court that the arrangement effectively creates house-banked games and encroaches on tribal exclusivity. Those cases are ongoing.
What Stays Illegal Even With the Exceptions
Sports betting is illegal in California. In November 2022, voters rejected Propositions 26 and 27, which would have legalized it through tribal-and-track and online frameworks respectively. Both lost decisively after tribal gaming interests and online sportsbook companies spent more than $400 million campaigning against each other’s proposals. No successor measure has passed. Offshore sites are reachable from a California IP address but operate outside U.S. jurisdiction and offer bettors no legal protection.
Online casinos and online poker sites are also illegal in the state. There are no California-licensed platforms. Federally, the Unlawful Internet Gambling Enforcement Act of 2006 blocks financial institutions from processing payments tied to illegal online gambling.9eCFR. 12 CFR Part 233 – Prohibition on Funding of Unlawful Internet Gambling (Regulation GG) At the state level, Penal Code Section 330 reaches online games to the extent they involve banking or percentage play.3California Legislative Information. California Code PEN 330 – Gaming
The Legislature has tried and failed to legalize online poker. Senate Bill 1366 in 2014 would have set up the Internet Poker Consumer Protection Act.10California Legislative Information. SB-1366 Internet Gambling Assembly Bill 2863 in 2016 made a similar attempt.11California Legislative Information. California Legislature – AB 2863 Gambling: Internet Poker Neither reached the governor’s desk. Tribes, cardrooms, and tech companies couldn’t agree on who would qualify for licenses or whether “bad actors” who had operated in the pre-regulation U.S. market should be excluded.
Online horse race wagering is the one online exception. Licensed platforms offer pari-mutuel betting under the federal Interstate Horseracing Act.
Penalties for Running or Playing at an Unauthorized Casino
A basic Section 330 violation is a misdemeanor punishable by a fine of $100 to $1,000, up to six months in county jail, or both. Judges can substitute summary probation for jail.3California Legislative Information. California Code PEN 330 – Gaming
Operators face steeper exposure. Large-scale illegal gambling operations, especially those linked to organized crime, can draw additional felony charges. The Bureau of Gambling Control investigates underground casinos and unlicensed gambling rings, and raids often produce asset seizures under the California Control of Profits of Organized Crime Act, which lets prosecutors confiscate cash, equipment, and property connected to criminal enterprises.12California Legislative Information. California Penal Code 186.1 – California Control of Profits of Organized Crime Act Running an unlicensed online gambling site from inside California adds federal exposure under UIGEA on top of the state charges.