Aşağısüphan is a village in Adilcevaz District, in Bitlis Province, Türkiye. Aşağısüphan lies in the Mount Süphan mountains. It has 1,058 inhabitants (2022). The nearest city is Ahlat, 34 km to the west. Among the landmarks around are Monastery of the Miracles (14.1 km), Kef Castle (13.5 km) and Tombstones of Ahlat (37 km).