Andersonville is an unincorporated community and census‑designated place (CDP) located in Anderson County, Tennessee, United States. Situated on Tennessee State Route 61, the community lies east of Norris and south of Norris Lake. The Andersonville post office serves ZIP code 37705, which encompasses much of northeastern Anderson County as well as portions of adjacent Union County and parts of the city limits of Norris.
Geographically, Andersonville covers a total area of 1.62 square miles (4.19 km²), all of which is land, at an elevation of approximately 968 feet (295 m). According to the 2020 United States Census, the CDP had a population of 508 residents; the 2010 census recorded 472 inhabitants.
Historically, the community’s founding family donated land for its first grade school in 1830. This school was replaced in 1873 by Big Valley Academy, a locally financed institution that later became the Andersonville Institute after the Clinton Baptist Association acquired the building and added high‑school grades in 1898. The Anderson County School Board assumed responsibility for the school in 1923. In 1938, secondary students were transferred to the newly constructed Norris High School in nearby Norris, and the Andersonville school reverted to an elementary facility. A new single‑story building opened on the site in 1961 after the original two‑story structure was demolished in 1958.
Andersonville received brief national attention in 1933 when Tennessee Valley Authority photographer Lewis Hine documented a family living on a farm near the community during the construction of Norris Dam.
The climate of Andersonville is classified as humid subtropical (Köppen “Cfa”), characterized by hot, humid summers and generally mild to cool winters.