Clarkston is a city in DeKalb County, Georgia, United States. The population was 14,756 as of the 2020 census, up from 7,554 in 2010. The city is noted for its ethnic diversity, and is often referred to as "the most diverse square mile in America" and "the Ellis Island of the South." In the 1990s, refugee resettlement programs identified Clarkston as a good fit for displaced persons of many backgrounds.