Goodlettsville, TN has a population of 16,848 and is the 2,540th largest city in the United States. The population density is 1,185 per sq mi which is 674% higher than the Tennessee average and 1208% higher than the national average. The median age in Goodlettsville is 43 which is approximately 10% higher than the Tennessee average of 39. In Goodlettsville, 55% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 64% of Goodlettsville residents were born in Tennessee, 31% were born out of state, 1% were born outside of the United States and 4% were foreign born.