Koçak is a village in Gercüş District, in Batman Province, Türkiye. Koçak lies at 1,224 m above sea level, in the Zagros mountains. It has 726 inhabitants. The nearest city is Midyat, 21 km to the southwest. Among the landmarks around are Mor Gabriel Monastery (28 km), Ilısu Dam (30 km) and Mor Yakup Monastery (14.5 km).