Dereli is a village in Gercüş District, in Batman Province, Türkiye. Dereli lies at 863 m above sea level, in the Zagros mountains. It has 156 inhabitants. The nearest city is Kurtalan, 30 km to the north. Among the landmarks around are Ilısu Dam (22 km), Boncuklu Tarla (21 km) and Mor Gabriel Monastery (39 km).