Drinjača (Cyrillic: Дрињача) is a left tributary of the Drina in eastern Bosnia and Herzegovina. It rises on the mountain of Konjuh (1,326 m) 15 km northeast of Kladanj at an altitude of about 1,000 m and ends after 77 km. The catchment area covers 1875 km².
Coordinates: 44°17′N 19°09′E / 44.283°N 19.150°E