Musselshell County is a county in the U.S. state of Montana. As of the 2010 United States Census, there were 4,538 people. Its county seat is Roundup. It was created in 1911.
Musselshell County is a county in the U.S. state of Montana. As of the 2010 United States Census, there were 4,538 people. Its county seat is Roundup. It was created in 1911.