McClellanville is a small fishing town in rural Charleston County, South Carolina, United States. The population was 605 at the 2020 census. It is situated on the Atlantic coast, on land surrounded by Francis Marion National Forest, and has traditionally derived its livelihood from the Atlantic Ocean and coastal marshes by fishing, shrimping and oystering. McClellanville is part of the Charleston-North Charleston-Summerville metropolitan area and the Charleston-North Charleston Urbanized Area.

Charleston County is located in the U.S. state of South Carolina along the Atlantic coast. As of the 2020 census, the population was 408,235, making it the third-most populous county in South Carolina. Its county seat is Charleston. It is also the largest county in the state by total area, although Horry County has a larger land area. The county was created in 1800 by an act of the South Carolina State Legislature.