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.