Dèmićka is a river that flows through Bosnia. It is the largest left bank tributary of the Vrbanja river. It rises above the Dunići village at around 1,050 meters above sea level, on the southern slopes of Zāstinje (Backstones, 1,230 m), in Vlašić massif. The river's length is around 10 km. In spring Vrbanja's tributaries (Ćorkovac, Sadika, Duboka and Ugar (the confluence of Kobilja and other streams) flow. The main tributaries of Demićka are Grozničavica, Djevojački potok and Brestovača.