The county in which Sun River Montana is located is ranked as the what most populous county in Montana?
Cascade County, Montana Cascade County ("cascade" means "waterfall" in French) is a county located in the U.S. state of Montana. As of the 2010 census, the population was 81,327, making it the fifth-most populous county in Montana. Its county seat is Great Falls.
Winnett, Montana Winnett is a town in and the county seat of Petroleum County, Montana, United States. The population was 182 at the 2010 census.