Arcadia, SC has a population of 3,820 and is the 7,652nd largest city in the United States. The population density is 1,949 per sq mi which is 1221% higher than the South Carolina average and 2051% higher than the national average. The median age in Arcadia is 25 which is approximately 35% lower than the South Carolina average of 39. In Arcadia, 53% of the population over 15 years of age are married, 33% speak English and 66% speak Spanish. 46% of Arcadia residents were born in South Carolina, 12% were born out of state, 0% were born outside of the United States and 41% were foreign born.