Fort Oglethorpe, GA has a population of 9,613 and is the 4,052nd largest city in the United States. The population density is 692 per sq mi which is 314% higher than the Georgia average and 663% higher than the national average. The median age in Fort Oglethorpe is 38 which is approximately 4% higher than the Georgia average of 36. In Fort Oglethorpe, 64% of the population over 15 years of age are married, 96% speak English and 0% speak Spanish. 32% of Fort Oglethorpe residents were born in Georgia, 65% were born out of state, 1% were born outside of the United States and 2% were foreign born.