Barnwell County is in Midlands South Carolina. Of the 46 counties in the Palmetto State, Barnwell County is 30th in terms of its size (557 square miles). Barnwell County, South Carolina, includes 1,000 acres of farms for sale based on recent Land Network data. The combined market value of farms, rural land, hunting land and other land for sale here was nearly $3 million. The average price of farms for sale in Barnwell County was $471,308. Farms for sale in Barnwell County support livestock including horses. Browse all South Carolina 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 commercial or individual needs.