Sharpsburg is located in eastern Coweta County at 33°20′22″N 84°39′1″W / 33.33944°N 84.65028°W / 33.33944; -84.65028 (33.339337, -84.650155). The town of Turin is immediately to the southeast. Georgia State Route 16 runs through the southern part of Sharpsburg, leading west 10 miles (16 km) to Newnan, the county seat, and southeast 7 miles (11 km) to Senoia. GA 54 leads northeast 5 miles (8 km) to Peachtree City.
As of the census of 2000, there were 316 people, 125 households, and 86 families residing in the town. The population density was 579.0 people per square mile (221.8/km2). There were 127 housing units at an average density of 232.7 per square mile (89.2/km2). The racial makeup of the town was 94.94% White, 4.11% African American, 0.32% Native American, 0.32% from other races, and 0.32% from two or more races. Hispanic or Latino people of any race were 3.48% of the population.