California is the richest and most populous state in the U.S., and therefore an important market for gambling. However, its political landscape is complex, and competing interests have tended to sink most attempts at gambling expansion, despite the state’s overall liberal politics.

Retail poker is huge in California, thanks to its many cardrooms, which can legally offer only player-vs.-player, card-based forms of gambling. Many of the biggest tournaments and most popular poker streams in the U.S. take place at venues in California, like Bay 101, Commerce Casino, the Bicycle, and Stones Gambling Hall.

Online poker is a different story, being illegal for real money in the state. For a time, sweepstakes poker rooms targeted California residents, but the state banned that business model in September 2025.