Butte is a consolidated city-county and the county seat of Silver Bow County, Montana, United States. In 1977, the city and county governments consolidated to form the sole entity of Butte-Silver Bow. The city covers 718 square miles, and, according to the 2020 census, has a population of 34,494, making it Montana's fifth-largest city. It is served by Bert Mooney Airport with airport code BTM.