Harriman, TN has a population of 6,223 and is the 5,618th largest city in the United States. The population density is 588 per sq mi which is 284% higher than the Tennessee average and 549% higher than the national average. The median age in Harriman is 42 which is approximately 10% higher than the Tennessee average of 39. In Harriman, 52% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 72% of Harriman residents were born in Tennessee, 27% were born out of state, 1% were born outside of the United States and 0% were foreign born.