Fountain City is a neighborhood in northern Knoxville, Tennessee, in the southeastern United States. Although not a census-designated place, the populations of the two ZIP codes that serve Fountain City— 37918 and 37912— were 36,815 and 18,695, respectively, as of the 2000 U.S. census. At the time of its annexation by the city of Knoxville in 1962, Fountain City was the largest unincorporated community in the United States.

Knoxville is a city in and the county seat of Knox County, Tennessee, United States. As of the 2020 United States census, Knoxville's population was 190,740, making it the largest city in the East Tennessee Grand Division and the state's third-most-populous city after Nashville and Memphis. It is the principal city of the Knoxville metropolitan area, which had a population of 879,773 in 2020.