Redan, Georgia - Wikipedia Redan is a census-designated place (CDP) in DeKalb County, Georgia, United States.As of the 2020 census, the CDP had a total population of 31,749.It is a predominantly African American community in eastern DeKalb County, and is a suburb of Atlanta.. According to tradition, the name "Rednan" is an amalgamation of the names of two early settlers: N. M. Reid and Annie Alford.