The community of Münchhausen is found 20 km (12 mi) north of Marburg on the northern edge of Marburg-Biedenkopf district. It has 3,605 inhabitants and has had its current boundaries since 1974. The community's area is roughly 41 km².
West of the community lies the Rothaargebirge, a low mountain range. The municipal area is bounded on the east by the Burgwald, another low mountain range. The constituent communities of Münchhausen and Simtshausen lie in the Wetschaft valley. Wollmar lies on the like-named river Wollmar, which empties into the Wetschaft in Münchhausen. Through the constituent communities of Oberasphe and Niederasphe flows the river Asphe.