The Oredezh River (Russian: О́редеж) is a river in Volosovsky, Gatchinsky, and Luzhsky Districts in the south-western part of Leningrad Oblast, Russia, a right tributary of Luga River. The length of the river is 192 kilometres (119 mi), whereas the area of its drainage basin is 3,220 square kilometres (1,240 sq mi). The principal tributary of the Oredezh is the Suyda (left).