Mount Hasan is a volcano in Anatolia, Turkey. It has two summits, the 3,069 metres high eastern Small Hasan Dagi and the 3,253 metres high Big Hasan Dagi, and rises about 1 kilometre above the surrounding terrain. It consists of various volcanic deposits, including several calderas, and its activity has been related to the presence of several faults in the area and to regional tectonics.