Montigny-sur-l'Hallue (French pronunciation: [mɔ̃tiɲi syʁ laly]; Picard: Montignin-su-l'Hallue) is a commune in the Somme department in Hauts-de-France in northern France.

The commune is situated on the D78 road, some 13 miles (21 km) northeast of Amiens.

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