A casino (or gambling house) is an establishment where people can gamble. Most casinos have games of chance, such as blackjack and roulette. Some have live entertainment such as shows or musical performances. People can also wager money on sports events and races. Casinos are most often found in resorts, hotels, and other tourist attractions. They may also be built near or combined with cruise ships, retail shops, and restaurants. In some countries, casinos are licensed and regulated by government authorities.

A modern casino is a specialized business that uses computers to monitor and control gaming activities. These systems allow the casino to track the winnings and losses of players, as well as provide security and customer service. The computers can also track player habits and identify problem gamblers. Some casinos use computer programs to analyze the probability of different outcomes at various tables and slots, and they hire mathematicians to do this work.

Historically, the word casino has been used to refer to an establishment offering a variety of card games, especially those popular in the United States and Europe. These include baccarat, chemin de fer, and the more common games of blackjack, roulette, and poker. The game of keno is also sometimes included in the definition of casino.

The oldest and largest casino in the world is the Monte-Carlo Casino, a famous gambling center located in Monaco. It was opened in 1863 and is a source of income for the Principality of Monaco. It has two floors with about 1,000 slot machines and a number of table games. It has been featured in many movies including the James Bond series.