Butte ) is a city in Montana and the county seat of Silver Bow County, United States. In 1977, the city and county governments consolidated to form the sole entity of Butte-Silver Bow. As of the 2010 census, Butte's population was 34,200. Butte is currently Montana's 5th largest city.In the 19th and 20th centuries, Butte experienced every stage of development of a mining town, from camp to boomtown to mature city to center for historic preservation and environmental cleanup. Unlike most such towns, Butte's urban landscape includes mining operations set within residential areas, making the environmental consequences of the extraction economy all the more apparent. Despite the dominance of the Anaconda Company, Butte was never a company town. It prided itself on architectural diversity and a civic ethos of rough-and-tumble individualism. In the 21st century, efforts at interpreting and preserving Butte's heritage are addressing both the town's historical significance and the continuing importance of mining to its economy and culture.Butte was Montana’s largest city until 1960, and was one of the largest cities west of the Mississippi for generations. In its heyday between the late 19th century and about 1920, it was one of the largest and most notorious copper boomtowns in the American West, home to hundreds of saloons and a famous red-light district. The documentary Butte, America depicts its history as a copper producer and the issues of labor unionism, economic rise and decline, and environmental degradation that resulted from the activity.The city is served by Bert Mooney Airport. The airport code for Butte is BTM.