Sage grouse are native to the sagebrush steppe of western North America. Their distribution closely follows that of sagebrush, primarily big sagebrush.
Once found in 13 western states and three Canadian provinces, sage grouse are found today in 11 states and in southern Alberta and Saskatchewan. The bird's remaining strongholds are in Montana, Wyoming, Idaho, Nevada, and Oregon.
Distribution of sage grouse in Montana includes the eastern one-half and southwest corner of the state -- roughly 27 million acres of sagebrush-grassland in 39 counties.