Which  county located in the U.S. state of Montana is Brockton  a town in
Roosevelt County, Montana Roosevelt County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 10,425. Its county seat is Wolf Point. Roosevelt County was created by the Montana Legislature in 1919 from Sheridan County. The name honors former president Theodore Roosevelt, who had died shortly before the county was formed.
Beaverhead County, Montana Beaverhead County is the largest county by area in the U.S. state of Montana. As of the 2010 census, the population was 9,246. Its county seat is Dillon. The county was founded in 1865.