Gerger is a city in Gerger District, in Adıyaman Province, Türkiye. Gerger lies in the Malatya Dağları mountains, by the Atatürk Reservoir. It has 2,757 inhabitants (2022). The nearest city is Çermik, 39 km to the east. Among the landmarks around are Gerger Castle (8.1 km), Karakaya Dam (24 km) and Nissibi Bridge (15.3 km).