San Carlos de Bariloche, usually known as Bariloche, is a city in the province of Río Negro, Argentina, situated in the foothills of the Andes on the southern shores of Nahuel Huapi Lake. It is located within the Nahuel Huapi National Park. After development of extensive public works and Alpine-styled architecture, the city emerged in the 1930s and 1940s as a major tourism centre with skiing, trekking and mountaineering facilities. In addition, it has numerous restaurants, cafés, and chocolate shops. The city had a permanent population of 108,205 according to the 2010 census. According to the latest statistics from 2015, the population is around 122,700, and a projection for 2020 estimates 135,704.

Río Negro is a province of Argentina, located in northern Patagonia. Neighboring provinces are from the south clockwise Chubut, Neuquén, Mendoza, La Pampa and Buenos Aires. To the east lies the Atlantic Ocean.