Welcome to Rosebud County

Rosebud County was established on February 1, 1901 and is located in Southeastern Montana covering approximately 5,027 square miles (5,010 square miles is land and 17 square miles is water). The county Courthouse began construction in Forsyth in 1912, for more history on our Courthouse visit our Resource page. Rosebud County is Montana’s twenty-second most populous county, with an estimated population of 8,329 as of the latest census in 2020.

Other cities and towns in Rosebud County include Angela, Ashland, Birney, Colstrip, Hathaway, Ingomar, Lame Deer, Rosebud, and Sumatra. A large portion of the Northern Cheyenne Indian Reservation lies within Rosebud County.

  • Rosebud County is the fourth largest County by land area in the State of Montana.
  • Topography of Rosebud County is mostly rolling with small hills.  Elevations range from 2,441 feet above sea level near Hathaway to 4,807 feet above sea level in the Little Wolf Mountains west of Colstrip.
  • The County’s leading source of income are from agriculture, tourism, railroad, coal mining and electrical generation.
  • There are 1,165 miles of County road.
  • Medical facilities are located in Ashland, Lame Deer, Colstrip and Forsyth.

43.2 ° Forsyth, MT
courthouse

News

Municipal Elections 2025

Filing opened April 17, 2025 for the following City Council positions Colstrip: 2 Council positions Forsyth: Mayor, 1 West Ward Council member and 1 East Ward Council member Filing closes June 16th All positions are 4 year terms Primary Election is held Tuesday, September 9th General Election is held Tuesday, November 4th


NOTICE: Taxes Due

Reminder:

The second half of 2024 Real Estate Taxes are due on or before May 31, 2025. Payments post marked after this date will be assessed penalty, interest and returned. Payments should be mailed to: Rosebud County Treasurer PO Box 167 Forsyth, MT 59327 As Per MCA 15-16-101(4) **please include Tax ID or Payment Stub with your check, if you think there may be an assignment against your property please call us for proper procedures.

PROPERTY TAXES MAY BE PAID ONLINE. SEE More