Halfeti (Kurdish: Xelfêtî‎, Ottoman Turkish: روم قلعه‎, Rumkale) is a small farming district on the east bank of the river Euphrates in Şanlıurfa Province in Turkey, 120 km from the city of Şanlıurfa. Population (2000 census) 33,467 (of which 2,608 were in the town of Halfeti, the majority being in the surrounding villages).

Most of the villages were submerged in the 1990s under the waters behind the dam on the Euphrates at Birecik. The town was therefore removed to the village of Karaotlak, the building of the new town is now complete.

Halfeti was the subject of an internet urban legend wherein the town was the only location on Earth where black roses grew.