Why a key Georgia county flipped from red to blue—and what it means for Democrats

Joe Biden’s victory in Georgia was surely the most surprising red state flip in the 2020 presidential election. Exploring the strikingly rapid transformation of Gwinnett County, the state’s largest suburban county, shows how this upset happened, while offering insights into the state’s upcoming U.S. Senate runoffs.

At the midpoint of the 20th century, Gwinnett, 30 miles northeast of Atlanta, was largely rural, with just 32,000 inhabitants, more than 95% of them white. Scarcely 2% of the residents had completed four years of college, and only 25% of the workforce held professional or managerial jobs. Who could have imagined that today, Gwinnett County would be home to nearly 950,000 people and one of the most diverse counties in the country?

Gwinnett’s path would be shaped by nearby Atlanta, which lost 162,000 white residents between 1960 and 1980. Gwinnett saw its white population swell by 102,000 over the same period. The county also grew with the arrival of thousands of white migrants from elsewhere in the nation, drawn by the dynamic metropolitan Atlanta economy. By 1990, some 357,000 people, more than nine out of 10 of them white, lived in Gwinnett County.

Growth in Gwinnett would accelerate, even as the new arrivals became more diverse. By 1990, metro Atlanta, including suburban counties like Gwinnett, was becoming a top destination for African-Americans on the move from other parts of the U.S. Meanwhile, the allure of the suburbs was accelerating the outmigration of upwardly mobile Black people from Atlanta itself. The share of Gwinnett’s population that was African-American more than doubled in the 1990s, and the Black population grew by 140% in the decade that followed. With this influx continuing, and many Gwinnett whites heading off to the decidedly whiter exurbs like Barrow and Walton counties, by 2020, 30% of Gwinnett residents were Black.

This is only part of the story of Gwinnett’s diversification. The explosion of construction jobs spawned by the 1996 Olympic Games, in combination with a falloff in employment in the Texas and Louisiana oilfields, exerted a push-pull effect on Latino in-migrants, so that today, Latin Americans constitute 20% of the county’s population. The heated pursuit of foreign investment, reflected in a current count of more than 600 foreign-owned companies in the county, also drew a steadily expanding stream of Asian and Asian-American workers, who liked the county’s highly touted schools and relatively low living costs. By 2020, residents of Asian descent accounted for 13% of Gwinnett’s population.