Béthencourt-sur-Mer (French pronunciation: [betɑ̃kuʁ syʁ mɛʁ], literally Béthencourt on Sea; Picard: Bétincourt-su-Mér) is a commune in the Somme department in Hauts-de-France in northern France.
The commune is situated on the D19 and D229 road junction, some 3 miles (5 km) from the seaside and 18 miles (29 km) west of Abbeville.
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