Barnesville is a city located in Lamar County, in the state of Georgia (GA), United States. Nestled in the South Atlantic division of the South region, it covers an area of 5.7 square miles (15.0 km²) and sits at an elevation of 850 ft. With a population of approximately 5,972 residents, Barnesville offers a peaceful, rural atmosphere.
The town's population is composed of about 45.58% males and 54.42% females, and it has a population density of 55.12 people per square mile (407.39/km²). Barnesville lies at a latitude of 33.05 and a longitude of -84.16, operating in the UTC-5.
Locals reflect a blend of American ancestry, with roots primarily in United States (11.7%), followed by English (3.7%), German (3.8%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 30204.