Centerville, also known as Thurman, is a city in western Gallia County, Ohio, United States. The city lies adjacent to the Gallia - Jackson county line. It is located adjacent to U.S. Route 35 at the eastern terminus of State Route 279.

Gallia County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 29,220. Its county seat and largest village is Gallipolis.