The Deûle (French pronunciation: [døl]; Dutch: Deule) is a river of northern France which is channeled for the main part of its course (from Lens to Lille). The upstream part is still partly free-flowing and is known as the Souchez. The Deûle flows into the Lys (right bank) in Deûlémont.

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Deûle
The Deûle near Bois Blancs
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Location
Country	France
Region	Hauts-de-France
Physical characteristics
Source
• location	France
Mouth
• location	Lys
• coordinates	50°43′52″N 2°56′41″E
Basin features
Progression	Lys→ Scheldt→ North Sea

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The Souchez is formed from the union, in the village of Souchez, of two smaller brooks, called the Carency and the Saint-Nazaire.

The channeled part comprises two branches:

• the high gauge canal known as Canal de la Deûle which ensures the connection between the channeled Lys and the Scarpe (a tributary of the Scheldt) in Douai,^[1]
• the Canal de Lens,^[2] fed by the Souchez,^[3] which connects Lens with the Canal de la Deûle at Courrières.

Immediately downstream of Lens, the channel is unusually elevated compared to the neighboring banks, as a result of mining depressions.

The Deûle flows through the departments of Pas-de-Calais and Nord, and the towns of Lens, Wingles, Loos, Lille, Wambrechies and Quesnoy-sur-Deûle, before it flows into the Lys at Deûlémont.

The Deûle does not yet profit from a Schéma d'aménagement et de gestion des eaux.