Mount Hasan (Turkish: Hasan Dağı) is an inactive stratovolcano in Aksaray province, Turkey. With an altitude of 3,253 m (10,672 ft.), it ranks as the second highest mountain of central Anatolia. A caldera 4-5 kilometres wide formed near the current summit around 7500 BC, in an eruption recorded in Neolithic paintings.
The ancient settlement of Çatalhöyük collected obsidian from the area of Hasan Dağ, which they probably traded with other settlements for luxury goods. Obsidian mirrors and flakes have also been found. The importance of Hasan Dağ to the people of Çatalhöyük may be shown by a wall painting, sometimes called the "first landscape" by art historians, which some believe is a depiction of Hasan Dağ towering over the settlement's houses.
Approximately a six hours' walk is required to climb to the top of the mountain from the highest point accessible by car. The summit offers a fabulous view over the central Anatolian plateau, including distant Cappadocia.