A casino is a facility for certain types of gambling. Casinos are often built near or combined with hotels, restaurants, retail shopping, cruise ships, and other tourist attractions. Some casinos are also known for hosting live entertainment, such as stand-up comedy, concerts, and sports

Casino is of Italian origin; the root casa means a house. The term casino may mean a small country villa, summerhouse, or social club. During the 19th century, the term casino came to include other public buildings where pleasurable activities took place; such edifices were usually built on the grounds of a larger Italian villa or palazzo, and were used to host civic town functions, including dancing, gambling, music listening, and sports. Examples in Italy include Villa Farnese and Villa Giulia, and in the US the Newport Casino in Newport, Rhode Island. In domino qq -day Italian a casino is a brothel (also called casa chiusa, literally "closed house"), a mess, or a noisy environment; a gaming house is spelt casinò, with an accent.

Not all casinos are used for gaming. The Catalina Casino, overlooking Avalon Harbor on Santa Catalina Island, California, has never been used for traditional games of chance, which were already outlawed in California by the time it was built., The Copenhagen Casino was a theatre, known for the mass public meetings often held in its hall during the 1848 Revolution, which made Denmark a constitutional monarchy. Until 1937, it was a well-known Danish theatre. The Hanko Casino in Hanko, Finland—one of that town's most conspicuous landmarks—was never used for gambling. Rather, it was a banquet hall for the Russian nobility which frequented this spa resort in the late 19th century and is now used as a restaurant.