Exeter, PA has a population of 5,605 and is the 6,006th largest city in the United States. The population density is 1,199 per sq mi which is 333% higher than the Pennsylvania average and 1224% higher than the national average. The median age in Exeter is 46 which is approximately 14% higher than the Pennsylvania average of 41. In Exeter, 59% of the population over 15 years of age are married, 96% speak English and 1% speak Spanish. 81% of Exeter residents were born in Pennsylvania, 16% were born out of state, 1% were born outside of the United States and 2% were foreign born.