Тосненский район
The drainage basin of the Oredezh includes the southern part of Gatchinsky District and the eastern part of Luzhsky District, as well as minor areas in the east of Volosovsky District and in the southwest of Tosnensky District. Urban-type settlements of Siversky, Vyritsa, and Druzhnaya Gorka lie in the basin of the Oredezh. A part of Mshinskoye Boloto Zakaznik lies in the basin of the Oredezh, west of the river course.