A casino is an establishment for gambling. It is a specialized type of business that may offer food, drinks, entertainment and other services to its patrons. Its operations are usually regulated by the law. It is not to be confused with a gambling house (Spanish, Italian and German: casin) or a gaming room (Japanese: ).

Modern casinos have an extensive use of technology to monitor activities. For example, in the United States, casinos use chip tracking to oversee minute-by-minute bets and warn dealers of any anomaly; roulette wheels are electronically monitored regularly for statistical deviations from expected results; and slot machines are adjusted for maximum gross profit through a combination of software and mechanical adjustments.

Some casino games have a skill element, and players with sufficient skills can eliminate the inherent long-term advantage of the house. Such players are known as advantage players.

Despite the prevalence of technology in the industry, some casinos have a distinct low-tech feel. The Monte Carlo casino, for instance, has been praised for its architecture and ambience. In addition, it has been depicted in many novels and films.

A UK native, Ben Pringle is a respected online casino expert with years of experience covering the North American iGaming market. He prioritizes user experience when assessing operators and produces in-depth casino reviews, bonus code walkthroughs, and educational guides to help newcomers to the scene. He is also the creator of Play+, a reloadable prepaid card that allows casino players to avoid transaction fees when playing on legal and grey market websites.