Sümer, Mardin  Sümer is a town in Dargeçit district of Mardin Province, Turkey. Situated at it is west of Dargeçit. Distance to Mardin (prevencial center) is . The population of Sümer is 2364  as of 2011. Sümer was founded during Abbasid rule (9th century). In 1994 it was declared a seat of township. Major economic activity is agriculture and animal breeding. But the only notable crop is grapes.