There was a combined almost $12 million of land for sale in Stanley County, South Dakota, recently on Land.com. The total acreage of all Stanley County farms, ranches, hunting land and other land for sale was almost 4,000 acres. Stanley County ranks 37th in South Dakota for the total acreage of land currently advertised for sale. Of all land and rural real estate for sale in Stanley County, Fort Pierre featured the most land for sale. Stanley County is the 17th largest county (1,517 square miles) in South Dakota. It's located in the Great Lakes South Dakota region of South Dakota.