The Scarpe is a river in the Nord-Pas-de-Calais region of France, left tributary of the Scheldt. It is approximately 100 kilometres (62 mi) long, of which two thirds has been turned into canals.
The source of the river is at Berles-Monchel near Aubigny-en-Artois. It flows through the cities Arras, Douai and Saint-Amand-les-Eaux. The river ends at Mortagne-du-Nord where it flows into the Scheldt.
The river and its valley were important battlegrounds in the First World War.
Scarpe Mountain in Alberta, Canada, was named after the river.