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 The City and County of Butte-Silver Bow. As of the 2000 census, Butte's population was 33,892. 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.