A combined almost 1,000 acres were listed for sale in South Dakota's Grant County recently; the value of all Grant County ranches, farms, hunting land and other rural land and acreage for sale was approximately $6 million. Grant County ranks 36th out of 66 counties in the Mount Rushmore State for the combined amount of land currently advertised for sale. Of all ranches, farms, hunting land and other rural land and acreage for sale in Grant County, Milbank featured the most land for sale. Grant County is South Dakota's 48th largest county (687 square miles). It's located in the Glacial Lakes & Prairies South Dakota region of South Dakota.