Riverdale is a city in Clayton County, Georgia, United States. The population was 15,134 at the 2010 census, up from 12,478 in 2000. Riverdale is a suburb just south of Hartsfield–Jackson Atlanta International Airport and is part of the Atlanta metropolitan area.
The area now known as Riverdale was settled before the Civil War. Riverdale was founded in 1886, when the railroad was extended to that point.
In 1908, the city was incorporated with the name Riverdale, named in honor of Mr. W.S. Rivers, the original owner of the town site.
Riverdale is in western Clayton County, 12 miles (19 km) south of downtown Atlanta and 6 miles (10 km) northwest of Jonesboro, the county seat.
According to the U.S. Census Bureau, Riverdale has an area of 4.5 square miles (11.6 km2), of which 0.012 square miles (0.03 km2), or 0.22%, is water.
As of the census of 2000, there were 12,478 people, 4,389 households, and 3,107 families residing in the city. The population density was 2,926.3 people per square mile (1,130.9/km2). There were 4,590 housing units at an average density of 1,076.4 per square mile (416.0/km2). The racial makeup of the city was 20.09% White, 67.42% African American, 0.30% Native American, 7.73% Asian, 0.08% Pacific Islander, 2.28% from other races, and 2.10% from two or more races.