Mont-Bernanchon (French pronunciation: [mɔ̃ bɛʁnɑ̃ʃɔ̃]) is a commune in the Pas-de-Calais department in the Hauts-de-France region of France.

[3] about 5 miles (8.0 km) north of Béthune and 27 miles (43 km) west of Lille.

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