|Length||230 km (140 mi)|
|Basin size||12,965 km2 (5,006 sq mi)|
The ʿAdhaim (العظيم) is a river that originates in the Zagros Mountains in Sulaymaniyah Governorate and joins the Tigris river after 230 kilometres (140 mi) at , some 30 kilometres (19 mi) downstream (east-to-southeast) of Samarra.
Its basin extends to 12,965 square kilometres (5,006 sq mi). The river is fed by rainwater and peak discharge is between January and March.