Dietzenbach is the seat of Offenbach district in the Regierungsbezirk of Darmstadt in Hesse, Germany and lies roughly 12 km southeast of Frankfurt am Main on the waterstream Bieber. Before the Second World War, the current town was a farming village with not quite 4,000 inhabitants. However, after the war, there was a considerable upswing in the population due to refugees settling in the community. From the 1970s onwards, Dietzenbach's population rose rapidly, reaching some 33,000 by 2006. Just under a third of the inhabitants have roots in more than a hundred nations outside Germany. Agricultural buildings are nowadays seldom seen in Dietzenbach.

The Hessentag is an annual event, both fair and festival, organized by the German state of Hesse to represent the different regions of Hesse. The events are shown for a week to the visitors, with an emphasis on cultural displays and exhibitions. It is the oldest and largest state festival (Landesfest) in Germany.