Sümer is a neighborhood in Dargeçit District, in Mardin Province, Türkiye. Sümer lies at 975 m above sea level, 2.9 km from the Zagros mountains. It has 1,430 inhabitants (2022). The nearest city is Midyat, 28 km to the southwest. Among the landmarks around are Ilısu Dam (17.3 km), Mor Gabriel Monastery (26 km) and Boncuklu Tarla (15.8 km).