The Ieperlee (or Ypres-Ijzer Canal) is a canalized river that rises in Heuvelland in the Belgian province of West Flanders and flows via the city of Ypres (Ieper) into the Yser at Fort Knokke.

Its name is derived from iep, the Dutch word for elm.

In the 11th century the river was canalized to link the city, which had a thriving cloth industry, to the sea.

During the First World War, the river was part of the frontline.

This article related to a river in Belgium is a stub.