09/01/2026
FRAUD ALERT: The County has been made aware of fraudulent letters claiming recipients have outstanding taxes and threatening action, often providing an 1-800 phone number.
Please do not provide payment or personal information in response to these letters. Official tax notices will come directly from the County Treasurer’s Office or the IRS.
To verify whether you have outstanding taxes, please contact our office or check the County’s official website.
406-346-7661
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 Res...