Jamestown, SC has a population of 63 and is the 27,854th largest city in the United States. The population density is 104 per sq mi which is 29% lower than the South Carolina average and 15% higher than the national average. The median age in Jamestown is 43 which is approximately 12% higher than the South Carolina average of 39. In Jamestown, 66% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 62% of Jamestown residents were born in South Carolina, 29% were born out of state, 6% were born outside of the United States and 3% were foreign born.