Greifenstein is a municipality in the Lahn-Dill-Kreis in Hesse, Germany. Its administrative seat is Beilstein. Greifenstein covers 67.43 km2 on the eastern slope of the Westerwald range. It was named for the castle of the same name in the constituent community of the same name. This is the site of the German Bell Museum, which holds about 50 bells that show the historical development of bell pouring and manufacture.

The Westerwald is a low mountain range on the right bank of the river Rhine in the German federal states of Rhineland-Palatinate, Hesse and North Rhine-Westphalia. It is a part of the Rhenish Massif. Its highest elevation, at 657 m above sea level, is the Fuchskaute in the High Westerwald.