According to new population estimates released last week, the five most populous counties in Georgia are all in metro Atlanta: Fulton, Gwinnett, Cobb, DeKalb and Clayton. Chatham County was replaced by Clayton in the top five this year.
The metro area — which includes 29 counties — had the nation's fourth highest population growth from 2017 to 2018, the Census Bureau says. The region's growth from 2010 to 2018 was also the fourth highest in the nation. In that time, 663,201 people were added to metro Atlanta's population, The Atlanta Journal-Constitution previously reported.