Tucker is a census-designated place in DeKalb County, Georgia, United States. The population was 27,581 at the 2010 Census. Although central Tucker, also known as "Main Street Tucker", is laid out as a planned "railroad town," it has never been formally incorporated. Municipal services such as fire, police, water, and schools are provided by DeKalb County. If incorporated, Tucker would be the second largest city in the county after Dunwoody.