A casino, also known as a gaming establishment or a gambling hall, is a place where various types of gambling activities take place. Casinos are most often found in the United States and are considered to be entertainment centers. They usually offer a variety of games, such as card games, dice games, dominoes, and gambling devices, such as the roulette wheel or traditional slot machines. The term casino may also be used to refer to a large building that houses one or more such establishments.

A successful casino makes billions of dollars each year for the companies, investors, and Native American tribes that own and operate them. In addition, state and local governments reap significant revenues in the form of taxes, fees, and other payments.

Gambling is legal in most jurisdictions, and the casino industry is highly regulated to ensure fair play and honesty. However, the casino business is not without controversy. Some critics argue that casinos encourage excessive gambling and have a negative effect on the economy and society. Others point out that casino profits help support charitable and philanthropic causes.

In the United States, there are over 1,000 casinos, including commercial and tribal casinos. The largest casino by revenue is in Las Vegas, Nevada, followed by Atlantic City and Chicago. Other major casinos are located in Colorado, Illinois, Indiana, Iowa, Michigan, and Mississippi. In some states, such as New Hampshire and Hawaii, casinos are not permitted. In addition to providing stimulating atmospheres and an extensive array of gambling opportunities, casinos offer a number of other amenities. For example, they frequently give away free rooms, show tickets, and other perks to encourage patrons to gamble and spend more money.