Brookings County is in Glacial Lakes & Prairies South Dakota. Of the 66 counties in the Coyote State, Brookings County is 41st in terms of its size (515,159 acres). South Dakota's Brookings County includes approximately 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of farms and ranches for sale here was about $1 million. The average price of residential acreage for sale in Brookings County was $343,600. Browse all residential land and rural property for sale in South Dakota to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.