Of 66 counties in the Coyote State, Pennington County is third in terms of its size (2,784 square miles). Pennington County is in Black Hills & Badlands South Dakota. There is approximately 1,000 acres of farms for sale in Pennington County, South Dakota, based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here is $5 million. Browse all Pennington County farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future business or individual needs. The most common type of land for sale by combined acreage in Pennington County is undeveloped land.