Colstrip is a city in Rosebud County, Montana, United States. The population was 2,214 at the 2010 census. Established in 1924 and incorporated as a city in 1998, Colstrip is the largest city in Rosebud County with 25% of the total population. Colstrip's primary industries are coal mining and electricity production. For the Sports Illustrated Magazine's 50th anniversary, it named Colstrip the top sports town in Montana.