Of 56 counties in the state, Musselshell County ranks 35th in terms of size (1,871 square miles). Musselshell County is in Southeast Montana. The total value of almost 9,000 acres of riverfront property recently listed for sale in Montana's Musselshell County was almost $18 million. Browse all waterfront property for sale in Musselshell County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Musselshell County is residential property.