South Charleston, WV has a population of 13,182 and is the 3,166th largest city in the United States. The population density is 1,671 per sq mi which is 2082% higher than the West Virginia average and 1744% higher than the national average. The median age in South Charleston is 43 which is approximately 3% higher than the West Virginia average of 42. In South Charleston, 52% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 77% of South Charleston residents were born in West Virginia, 21% were born out of state, 0% were born outside of the United States and 2% were foreign born.