Philadelphia, TN has a population of 1,023 and is the 15,005th largest city in the United States. The population density is 640 per sq mi which is 318% higher than the Tennessee average and 607% higher than the national average. The median age in Philadelphia is 32 which is approximately 17% lower than the Tennessee average of 39. In Philadelphia, 60% of the population over 15 years of age are married, 92% speak English and 8% speak Spanish. 63% of Philadelphia residents were born in Tennessee, 29% were born out of state, 0% were born outside of the United States and 8% were foreign born.