A casino is a facility where customers can gamble using cash or other items of value in games of chance. The games are usually conducted by dealers or croupiers. Some casinos offer table games such as baccarat and blackjack, while others specialize in slot machines or video poker. Some casinos also feature Far Eastern games such as sic bo (which spread to several European and American casinos in the 1990s), fan-tan, or pai gow.

Casinos are found in many places worldwide and are a major source of income for some governments. Some countries have laws prohibiting gambling, while others endorse it or regulate it. Some casinos are famous for their glitz, glamour and luxury, such as Monte Carlo in Monaco, or the Bellagio in Las Vegas.

While the precise origin of gambling is unknown, it is widely believed that humans have engaged in it since ancient times. In modern societies, people often gamble to relieve boredom or frustration or as a form of entertainment. The global casino and online gaming industry contributes over $231 billion to the world economy. In the United States alone, the gaming industry employs over 2 million workers and generates nearly $10 billion in tax revenue each year.