A casino is a gambling establishment where people gamble for cash or other types of credit. Gambling is legal in some countries, and casinos are a major source of income for local governments, owners, investors, and employees. In addition to the usual table games and slot machines, some casinos feature entertainment, restaurants, and hotels.

In the United States, casinos are regulated by state and local laws, and the legality of gambling varies by jurisdiction. Most states prohibit the establishment of new casinos, and many have licensing requirements for those that do exist. In general, casinos use the tools of science to ensure fairness and prevent cheating, including video cameras and other technological measures. Some casinos also employ expert mathematicians to evaluate the house edge and variance of each game.

The casinos most well known to the public are in Las Vegas, Reno, and Atlantic City, with other major ones located in cities around the world. In the twenty-first century, the industry has become choosier about its investments, and focuses on high rollers who spend much more than average. These gamblers are often given special rooms and personal attention.

Some of the most famous casinos have beautiful settings, such as the Casino de Monte-Carlo in Monaco and the Venice Casino, which is situated on the Grand Canals. Other casinos make their mark through a combination of thrill, entertainment, and memorable experience, such as Winstar World Casino in Oklahoma, home of Woody Guthrie and chicken fried steak.