Dayton, TN has a population of 7,308 and is the 5,025th largest city in the United States. The population density is 937 per sq mi which is 512% higher than the Tennessee average and 935% higher than the national average. The median age in Dayton is 35 which is approximately 8% lower than the Tennessee average of 39. In Dayton, 46% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 67% of Dayton residents were born in Tennessee, 30% were born out of state, 1% were born outside of the United States and 2% were foreign born.