Kocaköy is a municipality and district of Diyarbakır Province, Turkey. Its area is 248 km², and its population is 15,355. It is populated by Kurds. In the local elections in March 2019 Rojda Nazlıer was elected mayor. In October 2019 she was dismissed and charged with being a member of a terrorist organization. The current District Governor is Yasin Yunak, who was also appointed as trustee after Nazlıer was dismissed.