South Heights, PA has a population of 394 and is the 20,962nd largest city in the United States. The population density is 1,206 per sq mi which is 335% higher than the Pennsylvania average and 1231% higher than the national average. The median age in South Heights is 47 which is approximately 15% higher than the Pennsylvania average of 41. In South Heights, 61% of the population over 15 years of age are married, 96% speak English and 0% speak Spanish. 80% of South Heights residents were born in Pennsylvania, 16% were born out of state, 0% were born outside of the United States and 3% were foreign born.