Union County is in Southeast South Dakota. Of the 66 counties in the state, Union County ranks 62nd in terms of size (467 square miles). The total value of almost 1,000 acres of undeveloped land recently listed for sale in Union County, South Dakota, was $4 million. The average price of undeveloped acreage for sale in Union County was $2 million. Some suggested uses for undeveloped land currently for sale in Union County include for hunting/fishing, commercial, and residential single use. Some common wildlife species to be found on undeveloped land for sale in Union County include whitetail deer, mule deer, turkey, deer and pheasant. Current commercial applications for commercial property for sale in Union County include for hunting/fishing, commercial and residential single use. Browse all South Dakota undeveloped acreage for sale on the Land Network to find your next commercial property or land investment.