Franklin, PA has a population of 6,340 and is the 5,558th largest city in the United States. The population density is 1,356 per sq mi which is 389% higher than the Pennsylvania average and 1396% higher than the national average. The median age in Franklin is 44 which is approximately 7% higher than the Pennsylvania average of 41. In Franklin, 51% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 80% of Franklin residents were born in Pennsylvania, 19% were born out of state, 0% were born outside of the United States and 1% were foreign born.