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About Roundup, Montana

Roundup is a city in and the county seat of Musselshell County, Montana, United States. The population was 1,788 during the 2010 census.

News from Roundup

Roundup Facts

  • Population Total: 1931
  • Square Miles: 1.3
  • Area Code: 406
  • Elevation: 3215
  • Postal Codes: 59072-59073
  • Timezone: Mountain