The Sous River or Souss River (Shilha Berber asif n Sus, Classical Arabic وادى سوس wādī Sūs) is a river in mid-southern Morocco located in the Sous region. It originates in the High Atlas and flows west passing Aoulouz, Taroudannt, Oulad Teima, Inezgane and Aït Melloul. It forms a basin which is protected from the desertic climate of the Sahara by the Anti-Atlas mountains and is one of Morocco's most fertile regions.

The Aoulouz Dam is the main dam on this river.