Salm is a river in eastern Belgium (provinces of Liège and Luxembourg), tributary to the river Amblève. Its source is in the Ardennes, close to the border with Luxembourg near Bovigny . The Salm flows through the municipalities Gouvy, Vielsalm and Trois-Ponts, where it joins the river Amblève.

Salm is also a river in Germany, tributary to the Moselle.