Clarkston, GA has a population of 12,594 and is the 3,289th largest city in the United States. The population density is 6,957 per sq mi which is 4068% higher than the Georgia average and 7579% higher than the national average. The median age in Clarkston is 28 which is approximately 22% lower than the Georgia average of 36. In Clarkston, 42% of the population over 15 years of age are married, 50% speak English and 5% speak Spanish. 29% of Clarkston residents were born in Georgia, 23% were born out of state, 1% were born outside of the United States and 47% were foreign born.