Summerville, GA has a population of 4,408 and is the 7,005th largest city in the United States. The population density is 1,098 per sq mi which is 558% higher than the Georgia average and 1112% higher than the national average. The median age in Summerville is 44 which is approximately 22% higher than the Georgia average of 36. In Summerville, 51% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 87% of Summerville residents were born in Georgia, 12% were born out of state, 0% were born outside of the United States and 1% were foreign born.