South Pittsburg is a city in Marion County, Tennessee, United States. It is part of the Chattanooga, TN–GA Metropolitan Statistical Area. The population was 3,106 at the 2020 census. South Pittsburg is home to the National Cornbread Festival.

Marion County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 28,837. Its county seat is Jasper. Marion County is part of the Chattanooga, AL–TN–GA Metropolitan Statistical Area. Marion County is in the Central time zone, while Chattanooga proper is in the Eastern time zone.