Over the past 13 years, the demographics of 78 counties in 19 states have shifted from being predominantly white to having no single ethnic majority.

Georgia experienced the biggest change, with four out of five of the largest percentage shifts occurring there, said Pew Research Center and The Grio. In all, there were 14 counties in which the percentage of whites in 2000 was at least 60 percent but which now have no ethnically dominant group. Across the U.S., whites make up 63 percent of the total population.

In the Atlanta area in particular, the size of the white population has been relatively flat compared to the burgeoning African American populace. According to The Grio, this may be part of a trend towards reverse migration of African Americans from the North to the South. While small, Atlanta’s Latino population is also growing rapidly.

Other U.S. counties that experienced significant ethnic population growth include: Union and Middlesex (NJ); Contra Costa, Sacramento, Stanislaus and Riverside (CA): and Clark Country, NV.

Only two counties in the entire U.S. went from minority-white to predominantly white.

Although just 266 of 2,440 total counties are minority-white, these counties’ residents comprise about 33 percent of the total population. Many of these areas are urban and densely populated.