A casino is a place or building where people can play gambling games. It is also known as a gaming house or a kasino. Casinos are most commonly built near or combined with hotels, resorts, restaurants, retail shops, and other tourist attractions. Some casinos are operated by government-owned or private corporations, while others are owned by individuals. In the United States, the most famous casinos are in Las Vegas, Atlantic City, and Chicago.

Modern casinos offer a variety of gambling options, including blackjack, roulette, poker, craps, and slots. Some casinos have several types of each game, while others specialize in high-limit or non-traditional games. Some casinos are more luxurious than others, with opulent suites and gourmet dining available for high rollers.

In the United States, there are over 1,000 casinos. The industry is regulated in most jurisdictions. Some casinos are operated by Native American tribes. Most casinos are located in cities with large populations of tourists, such as Las Vegas, Reno, and Atlantic City. Some are located in small towns with few residents. Others are isolated from population centers, such as the Dakota Dunes Casino Resort in the interior of Canada.

People gamble by playing games of chance or skill, where the outcome is determined mostly by luck, but sometimes also by knowledge or strategy. The mathematical advantage of the house in these games is known as the house edge. While some gamblers are able to overcome this disadvantage, most do not.