Kingstree is a town in and the county seat of Williamsburg County, South Carolina, United States. The population was 3,328 at the 2010 census. According to the United States Census Bureau, the town has a total area of 3.2 square miles (8.3 km2), of which, 3.1 square miles (8.0 km2) of it is land and 0.04 square miles (0.10 km2) of it (0.63%) is water.
The Black River is a free flowing river that is surrounded by banks of undisturbed land. The river has plant and animal habitats including endangered species. Some of the endangered species include the American chaffseed and the swallow-tailed kite. The black color of the river comes from a chemical, tannins, that came from cypress trees and other swamps. The river draws sportsman because of the amount of fishes including bream, red breasted sunfish, large-mouth bass, and catfish.
The Williamsburg County Hometown Chamber Quality of Place Committee was able to get the South Carolina Department of Natural Resources to include the Black River in the Scenic River Program in 2001. A 75 mile piece of the river is included in the program. The Black River is South Carolina's longest river and was the seventh addition to the Scenic Rivers. The river is 150 miles long and goes through Williamsburg, Clarendon, Sumter, and Georgetown Counties in South Carolina.