Lithonia is a city in eastern DeKalb County, Georgia, United States. The city's population was 1,924 at the 2010 census. Lithonia is in the Atlanta metropolitan area.
Lithonia began as a small crossroads settlement of farmers. The town grew with the coming of the Atlanta Augusta Railroad in 1845, which allowed the granite quarrying industry in the area to flourish.Lithonia is the birthplace of the Lithonia Lighting company, one of North America's largest manufacturers of commercial, institutional, industrial and residentiallight fixtures, which was founded in the city in 1946 but moved to nearby Conyers in the 1950s.New Birth Missionary Baptist Church, a megachurch which is known for many high-profile funerals, is located near Lithonia. First Baptist Church of Lithonia 1844.