Roundup is a city located in Musselshell County, in the state of Montana (MT), United States. Nestled in the Mountain division of the West region, it covers an area of 1.3 square miles (3.0 km²) and sits at an elevation of 3226 ft. With a population of approximately 1,931 residents, Roundup offers a peaceful, rural atmosphere.
The town's population is composed of about 46.61% males and 53.39% females, and it has a population density of 441.04 people per square mile (556.39/km²). Roundup lies at a latitude of 46.45 and a longitude of -108.54, operating in the UTC-7.
Locals reflect a blend of American ancestry, with roots primarily in United States (4.7%), followed by English (14.8%), German (28.7%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 59072.