Oglethorpe, GA has a population of 1,323 and is the 13,450th largest city in the United States. The population density is 664 per sq mi which is 298% higher than the Georgia average and 633% higher than the national average. The median age in Oglethorpe is 43 which is approximately 18% higher than the Georgia average of 36. In Oglethorpe, 39% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 91% of Oglethorpe residents were born in Georgia, 9% were born out of state, 0% were born outside of the United States and 0% were foreign born.