Campbelltown, PA has a population of 4,048 and is the 7,395th largest city in the United States. The population density is 1,382 per sq mi which is 399% higher than the Pennsylvania average and 1426% higher than the national average. The median age in Campbelltown is 42 which is approximately 4% higher than the Pennsylvania average of 41. In Campbelltown, 66% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 68% of Campbelltown residents were born in Pennsylvania, 27% were born out of state, 1% were born outside of the United States and 4% were foreign born.