This article analyses the relationship between Islam and nationalism by considering the role of the ulama in Turkey, housed within the Presidency of Religious Affairs (PRA). The ulama – religious scholars and experts of Islamic law – in Muslim majority contexts are typically closely linked with the state and play a key role in shaping the boundaries of Islam and of what is Islamically acceptable. However, this is also of consequence for the boundaries of the nation, since in Turkey Islam and nationalism has been intertwined, with Islam playing a central role in nation‐building, as a basis of ethnic identity formation and a source of symbols and myths. This articles shows, firstly, that the PRA has acted as a carrier and preserver of Sunni (Hanefi) Muslim identity in continuity with the Ottoman ulama and, secondly, that it has delimited nation‐building, by considering its approach to and interventions against Alevi identity.