Seyit Hasan (formerly Bakacñk, ) is a neighbourhood in the municipality and district of Bismil, Diyarbakñr Province in Turkey. It is populated by Kurds and by Turkmens and had a population of 232 in 2022.
The Alevi Turkmen population settled in the village from Kisas in the 20th century. Many of them migrated to Germany and other parts of Turkey after 1989, while Kurds would settle in the village.