Unicoi, TN has a population of 3,573 and is the 7,951st largest city in the United States. The population density is 221 per sq mi which is 44% higher than the Tennessee average and 144% higher than the national average. The median age in Unicoi is 41 which is approximately 6% higher than the Tennessee average of 39. In Unicoi, 61% of the population over 15 years of age are married, 92% speak English and 6% speak Spanish. 56% of Unicoi residents were born in Tennessee, 38% were born out of state, 0% were born outside of the United States and 6% were foreign born.