The village lies in the Lower Westerwald southwest of the main settlement of Asbach on an eminence above and east of the Pfaffenbach stream. Thelenberg is only accessible on the Kreisstraße 41, which links the place to the Landesstraße 255 (Asbach - Neustadt). Within the parish of Thelenberg is the Thelenberg Mill (Thelenberger Mühle) in the Pfaffenbach valley. It is about one kilometre from the village itself.