Of 56 counties in Big Sky Country, Rosebud County ranks fifth by size (5,025 square miles). Rosebud County is in Southeast Montana. Rosebud County, Montana, has almost 4,000 acres of riverfront homes and property for sale based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here was nearly $7 million. Browse all waterfront property for sale in Rosebud 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 Rosebud County is house.