Union County is in Southeast South Dakota. Of the 66 counties in the Mount Rushmore State, Union County ranks 62nd in terms of size (467 square miles). Recent listings of commercial land and property for sale in South Dakota's Union County totals nearly 1,000 acres and a combined market value of almost $3 million. The most common type of land for sale by combined acreage in Union County is homesite. The average price of commercial acreage for sale in Union County was $361,819. Some suggested uses for commercial property currently for sale in Union County include for hunting/fishing, commercial, and agriculture use. Some common wildlife species to be found on undeveloped land for sale in Union County include whitetail deer, mule deer, deer, turkey and elk. Current commercial applications for commercial property for sale in Union County include for hunting/fishing, commercial and agriculture use. Browse all South Dakota commercial land and property for sale on the Land Network to find your next commercial property or land investment.