Of 66 counties in the Mount Rushmore State, Bennett County is 23rd in terms of its size (1,190 square miles). Bennett County is in Black Hills & Badlands South Dakota. Bennett County, South Dakota, has about 1,000 acres of riverfront homes and property for sale based on recent Land Network data. The combined market value of ranches, farms, hunting land and other rural land and acreage for sale here was roughly $3 million. Browse all waterfront property for sale in Bennett 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 Bennett County is house.