They are all on Native American Reservations and are dotted throughout the state. More casinos than any other stateĬalifornia currently has more casinos than any other US state. Also, in 2000, California voters voted on and passed Proposition 1A.This opened up the possibility for people to found casinos on Native American Reservations. The creation of the California Bureau of Gambling Control in 1998. At that time, it charged the Attorney General with creating uniform state-wide regulation. In 1984, the Golden State began to seriously regulate the gaming industry. While offline sports betting remains illegal in California, some form of gambling, such as poker, has been legal in California for over a century. Outside of Berkely, this is the only horse racing track remaining in Northern California.