Russellville, SC has a population of 358 and is the 21,466th largest city in the United States. The population density is 95 per sq mi which is 35% lower than the South Carolina average and 5% higher than the national average. The median age in Russellville is 35 which is approximately 10% lower than the South Carolina average of 39. In Russellville, 57% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 63% of Russellville residents were born in South Carolina, 37% were born out of state, 0% were born outside of the United States and 0% were foreign born.