Surfside Beach, SC has a population of 4,195 and is the 7,229th largest city in the United States. The population density is 2,172 per sq mi which is 1372% higher than the South Carolina average and 2297% higher than the national average. The median age in Surfside Beach is 52 which is approximately 35% higher than the South Carolina average of 39. In Surfside Beach, 52% of the population over 15 years of age are married, 92% speak English and 6% speak Spanish. 30% of Surfside Beach residents were born in South Carolina, 63% were born out of state, 1% were born outside of the United States and 5% were foreign born.