The Fakiyska reka (Bulgarian: Факийска река) is a 87 km long river in eastern Bulgaria that flows into Lake Burgas, which drains into the Black Sea.
The river takes its source under the name Garkova reka at an altitude of 463 m in the western part of the Strandzha mountain range, some 1.7 km north of the village of Strandzha just north of the Bulgaria–Turkey border. It initially flows in a deforested valley direction north until the village of Momina Tsarkva, northeast until Fakiya and east until Golyamo Bukovo. It then enters a deep, narrow and forested valley with many meanders, which separates the Strandzhan ridges of Karatepe to the northwest and Bosna to the southeast. Downstream of the abandoned village of Rakov Dol the valley widens and downstream of Zidarovo enters the Burgas Plain, where the Fakiyska reka forms a wide alluvial valley. It flows into Lake Mandrensko some 1.5 km southwest of the village of Dimchevo. The lake itself drains into the Gulf of Burgas in the Black Sea.