The city of Sandersville is the county seat of Washington County, Georgia, United States. The population was 5,912 at the 2010 census. It is also a part of the Central Savannah River Area.GeographyAccording to the United States Census Bureau, the city has a total area of, of which 9.1sqmi is land and 0.1sqmi (0.87%) is water.DemographicsAs of the census of 2011, there were 6,097 people, 2,315 households, and 1,568 families residing in the city. The population density was 672.1 people per square mile (259.5/km²). There were 2,566 housing units at an average density of 283.2 per square mile (109.4/km²). The racial makeup of the city was 59.03% African American, 39.76% White, 0.11% Native American, 0.60% Asian, 0.05% Pacific Islander, 0.03% from other races, and 0.41% from two or more races. Hispanic or Latino of any race were 0.24% of the population.There were 2,362 households out of which 31.8% had children under the age of 18 living with them, 37.2% were married couples living together, 25.8% had a female householder with no husband present, and 32.6% were non-families. 30.0% of all households were made up of individuals and 13.3% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 3.13.