Nielles-lès-Ardres (French pronunciation: [njɛl lɛ.z‿aʁdʁ], literally Nielles near Ardres; Dutch: Niel-bij-Aarde) is a commune in the Pas-de-Calais department in the Hauts-de-France region of France.

[3] Nielles-lès-Ardres lies about 14 miles (22 km) northwest of Saint-Omer, on the D225E road.

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