South Charleston is a village in Clark County, Ohio, United States.

[4] The first development was the plat of Charleston on November 1, 1815, becoming a matter of record in London on February 5, 1816, followed by the first election on September 19, 1818.

[5] According to the United States Census Bureau, the village has a total area of 1.28 square miles (3.32 km2), all of it land.

There were 793 housing units at an average density of 619.5 per square mile (239.2/km2).

31.1% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older.

There were 792 housing units at an average density of 610.5 per square mile (235.7/km2).

25.8% of all households were made up of individuals, and 11.5% had someone living alone who was 65 years of age or older.