Dreieich is a town in the Offenbach district in the Regierungsbezirk of Darmstadt in Hessen, Germany. The town is part of the Frankfurt Rhein-Main urban area and is located roughly 10 km (6.2 mi) south of downtown Frankfurt am Main. With a population of more than 40,000 it is the district’s second largest town.

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.