Barnesville, GA is a city located in Lamar County, Georgia and has a land area of 125.31 square miles (324.55 km2). The water area for the city is 1.29 square miles or 3.34 km2. There is one unique zip code in Barnesville, Georgia and it is 30204. The area code(s) for Barnesville is 770/470/678.
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