Groß-Umstadt is a town in the district of Darmstadt-Dieburg in the Bundesland (federal state) of Hesse in Germany. It is near by Darmstadt and Frankfurt on the northern border of mountain range Odenwald and is on the south-eastern edge of Rhine-Main Metropolitan Region. The population is about 21,000 residents. About half of residents are living in Groß-Umstadt itself and the remainder in eight other districts which were incorporated by Hesse State Municipal Reform Act in 1970s: Dorndiel Heubach Kleestadt Klein-Umstadt Raibach Richen Semd Wiebelsbach (also includes village Frau-Nauses). From Wikipedia