Greifenstein is a community 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. Its name comes from the castle of the same name in the constituent community of the same name, where the German Bell Museum (Deutsches Glockenmuseum) is to be found, with about 50 bells showing the development of bell pouring.