A casino (also called a gaming house or a gambling house) is an establishment for certain types of gambling. In some jurisdictions, casinos are licensed by government agencies to operate. They may be standalone facilities or they can be combined with hotels, restaurants, retail shops, cruise ships, and other tourist attractions. In some countries, casinos are operated by private corporations or Native American tribes. In the United States, casinos are regulated by state law. They make billions of dollars each year for their owners, investors, and gamblers.

Most casinos are built in large, beautiful resorts and offer a wide variety of games. They may include card rooms, slots, table games like baccarat, craps, blackjack, and roulette, and video poker machines. Many casinos also have restaurants, bars, and non-gambling entertainment options such as theaters and swimming pools. Casinos are a major source of income for governments, local businesses, and tribal leaders. In some cases, they are subsidized by local taxing authorities or by state governments. In the United States, casinos are a large part of the tourism industry and attract millions of visitors each year. Gambling is legal in most states, but the image of casinos has been marred by the association with illegal activities, such as organized crime, prostitution, and money laundering. Despite this, casinos continue to grow in popularity and are now often located in luxurious resorts. In recent years, they have become more technologically advanced. For example, betting chips with microcircuitry enable casinos to monitor the exact amounts wagered minute by minute, and roulette wheels are electronically monitored for any statistical deviation from their expected results.