Olanta, SC has a population of 525 and is the 19,238th largest city in the United States. The population density is 528 per sq mi which is 258% higher than the South Carolina average and 483% higher than the national average. The median age in Olanta is 50 which is approximately 29% higher than the South Carolina average of 39. In Olanta, 65% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 86% of Olanta residents were born in South Carolina, 14% were born out of state, 0% were born outside of the United States and 0% were foreign born.