Of 66 counties in the Mount Rushmore State, Lyman County ranks 14th in terms of size (1,706 square miles). Lyman County is in Great Lakes South Dakota. A recent survey of Land Network data includes around 2,000 acres of riverfront property for sale in South Dakota's Lyman County, which is valued at a combined $5 million. Browse all waterfront property for sale in Lyman 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 Lyman County is farms.