The county in which Sun River Montana is located is ranked as the what most populous county in Montana?
Sun River, Montana Sun River is a census-designated place (CDP) in Cascade County, Montana, United States. The population was 124 at the 2010 census. It is part of the Great Falls, Montana Metropolitan Statistical Area.
Teton County, Montana Teton County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 6,073. Its county seat is Choteau. The county was founded in 1893.