The county of Barnwell is located in and was founded in 1800. There are 22,621 residents in Barnwell who have access to courthouses in Barnwell, Blackville, Williston. In general, each county has a full set of courts, from traffic court to superior and appellate court; supreme courts are usually located in the state capital. is part of the 4th federal circuit court as well.
There are 4,750 residents in Barnwell, which is 7.7 square miles and 217ft above sea level.
There are 2,406 residents in Blackville, which is 8.9 square miles and 292ft above sea level.
There are 3,139 residents in Williston, which is 8.9 square miles and 354ft above sea level.