Franklin, TN has a population of 70,625 and is the 517th largest city in the United States. The population density is 1,700 per sq mi which is 1010% higher than the Tennessee average and 1777% higher than the national average. The median age in Franklin is 38 which is approximately 3% lower than the Tennessee average of 39. In Franklin, 65% of the population over 15 years of age are married, 89% speak English and 5% speak Spanish. 38% of Franklin residents were born in Tennessee, 51% were born out of state, 1% were born outside of the United States and 10% were foreign born.