Barnesville bypass and leads northeast to Jackson and southwest to Thomaston. According to the United States Census Bureau, Barnesville has a total area of , of which are land and , or 0.78%, are water. Barnesville sits on a low ridge at an elevation of above sea level. Hog Mountain rises above the city to the north, with a summit elevation of . The north side of the city drains via Big Towaliga Creek to the Little Towaliga River, the Towaliga River, and eventually the Ocmulgee River. The east side drains via Tobesofkee Creek to the Ocmulgee south of Macon. The south end of the city drains via Tobler Creek to the Flint River, and the west side drains via Little Potato Creek, then Potato Creek, to the Flint River. Because the Ocmulgee River ultimately drains to the Atlantic Ocean and the Flint River ultimately to the Gulf of Mexico, Barnesville sits on the Eastern Continental Divide. Demographics 2020 census As of the 2020 United States census, there were 6,292 people, 2,056 households, and 1,028 families residing in the city. 2011 As of the census of 2011, there were 6,669 people, 2,079 households, and 1,382 families residing in the city. The population density was . There were 2,257 housing units at an average density of . The racial makeup of the city was 48.11% White, 49.87% African American, 0.15% Native American, 0.33% Asian, 0.03% Pacific Islander, 0.57% from other races, and 0.94% from two or more races. Hispanic or Latino of any race were 1.69% of the population. There were 2,079 households, out of which 31.5% had children under the age of 18 living with them, 37.1% were married couples living together, 25.3% had a female householder with no husband present, and 33.5% were non-families. 29.0% of all households were made up of individuals, and 12.0% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.04. In the city, the population was spread out, with 23.6% under the age of 18, 17.7% from 18 to 24, 26.4% from 25 to 44, 18.5% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 83.8 males. For every 100 females age 18 and over, there were 78.6 males. The median income