South Palm Beach, FL has a population of 1,309 and is the 13,517th largest city in the United States. The population density is 12,984 per sq mi which is 4322% higher than the Florida average and 14231% higher than the national average. The median age in South Palm Beach is 68 which is approximately 63% higher than the Florida average of 42. In South Palm Beach, 60% of the population over 15 years of age are married, 83% speak English and 2% speak Spanish. 6% of South Palm Beach residents were born in Florida, 70% were born out of state, 1% were born outside of the United States and 23% were foreign born.