Rosebud County is a county in the state of Montana. It was established February 11, 1901, and has Montana vehicle license plate prefix 29. As of the 2020 census, the population was 8,329. Its county seat is Forsyth.
Geography
According to the United States Census Bureau, the county has a total area of , of which is land and (0.3%) is water. It is the fourth-largest county in Montana by land area and fifth-largest by total area. Part of Custer National Forest is located in the county.
Climate
According to the Köppen Climate Classification system, most of Rosebud County has a cold semi-arid climate, abbreviated "BSk" on climate maps.