Alcoa, TN has a population of 9,058 and is the 4,238th largest city in the United States. The population density is 611 per sq mi which is 299% higher than the Tennessee average and 575% higher than the national average. The median age in Alcoa is 41 which is approximately 5% higher than the Tennessee average of 39. In Alcoa, 53% of the population over 15 years of age are married, 91% speak English and 7% speak Spanish. 68% of Alcoa residents were born in Tennessee, 27% were born out of state, 0% were born outside of the United States and 5% were foreign born.