South Charleston is a village in Clark County, Ohio, United States. The population was 1,850 at the 2000 census. It is part of the Springfield, Ohio Metropolitan Statistical Area. As of the census of 2000, there were 1,850 people, 732 households, and 519 families residing in the village. The population density was 1,426.0 people per square mile (549.5 Sq/km). There were 792 housing units at an average density of 610.5 per square mile (235.2 Sq/km). The racial makeup of the village was 96.81% White, 1.51% African American, 0.32% Native American, 0.49% Asian, 0.05% Pacific Islander, 0.05% from other races, and 0.76% from two or more races. Hispanic or Latino of any race were 0.16% of the population.