The Reuberg lies in the western part of the Leine Uplands, a northern section of the Lower Saxon Hills. It measures about 3.5 kilometres in length and is situated within the triangle formed by the settlements of Alfeld, Delligsen and Duingen. It also lies between Brunkensen to the north, Warzen to the east, Gerzen to the southeast, Grünenplan some distance away to the east-southeast, Hohenbüchen to the west and some way from Coppengrave to the northwest.