Spring City is a town in Rhea County, Tennessee, United States. The population was 1,949 at the 2020 census and 1,981 at the 2010 census. The town is located along Watts Bar Lake, and Watts Bar Dam and the Watts Bar Nuclear Generating Station are nearby.

Rhea County is a county located in the U.S. state of Tennessee. As of the 2020 census, its population was 32,870. Its county seat is Dayton. Rhea County comprises the Dayton, TN micropolitan statistical area, which is also included in the Chattanooga-Cleveland-Dalton, TN-GA-AL combined statistical area.