Land for sale in Musselshell County recently totaled approximately $52 million and almost 100,000 acres. Musselshell County ranks 22nd out of 56 counties in the state for the total number of acres of land currently advertised for sale. There were three properties listed as sold in Musselshell County through the Land Network Comparable Sales Program. This represented a total value of $2,350,000. Roundup had the most land for sale. Economically speaking, Musselshell County's is largely dependent on mining and mineral extraction-related businesses and services. Musselshell County is the 35th biggest county (1,871 square miles) in Montana. It's located in the Southeast Montana region of Montana.