Mountain City is a city located in Johnson County Tennessee. It is also the county seat of Johnson County. With a 2020 population of 2,485, it is the 146th largest city in Tennessee and the 6845th largest city in the United States . Mountain City is currently growing at a rate of 0.98% annually but its population has decreased by -1.82% since the most recent census, which recorded a population of 2,531 in 2010. Mountain City reached it's highest population of in . Spanning over 3 miles, Mountain City has a population density of 737 people per square mile.
The average household income in Mountain City is $44,585 with a poverty rate of 37.41%. The median rental costs in recent years comes to $426 per month, and the median house value is $141,500. The median age in Mountain City is 45.7 years, 40.9 years for males, and 55.6 years for females.