Sümer is a neighborhood in Bünyan District, in Kayseri Province, Türkiye. Sümer lies 0.9 km from the Korumaz mountains. It has 1,540 inhabitants. The nearest city is İldem Cumhuriyet, 22 km to the west. Among the landmarks around are Kültepe (20 km), Caesarea (35 km) and Sarımsaklı Dam (12.4 km).