Millington, TN has a population of 11,069 and is the 3,642nd largest city in the United States. The population density is 333 per sq mi which is 117% higher than the Tennessee average and 267% higher than the national average. The median age in Millington is 38 which is approximately 1% lower than the Tennessee average of 39. In Millington, 51% of the population over 15 years of age are married, 92% speak English and 5% speak Spanish. 55% of Millington residents were born in Tennessee, 38% were born out of state, 3% were born outside of the United States and 4% were foreign born.