Dumlupınar is a neighborhood ("mahalle") in the district of Kadıköy, on the Anatolian side of Istanbul, Turkey.
Dumlupınar has one of the lower populations among the neighborhoods of Kadıköy--population 10,081 (2020). However, vertical architecture is increasing as the neighborhood undergoes urban transformation. 
Dumlupınar is bordered on the north by the Üsküdar neighborhoods of Acıbadem and , on the east by the Kadıköy neighborhood of Merdivenköy, on the south by the Kadıköy neighborhood of Eğitim, and on the west by the Kadıköy neighborhoods of and Hasanpaşa.