City and capital of Colorado, USA, on the South Platte river, near the foothills of the Rocky mountains; population (1980) 492,365, Denver-Boulder metropolitan area 1,850,000. It is a processing and distribution centre for a large agricultural area and for natural resources (minerals, oil, gas). It was the centre of a gold and silver boom in the 1870s and 1880s, and for oil in the 1970s. Denver was founded 1858 with the discovery of gold, becoming a mining-camp supply centre; coal is also mined nearby. There is a university, a mining school, many medical institutions, and the US mint.