Blangy-sur-Bresle (French pronunciation: [blɑ̃ʒi syʁ bʁɛl], literally Blangy on Bresle, before 1962: Blangy)[3] is a commune in the department of Seine-Maritime in the Normandy region of northern France.

Blangy is a small town situated in the valley of the river Bresle – which here forms the border between Normandy and Picardy – some 40 kilometres (25 mi) east of Dieppe in the Pays de Bray.

Forestry, farming, and light industry are the main economic activities.

The town lies on the D49 and the D928 roads close to junction 5 of the A29 motorway.

Blangy-sur-Bresle station has rail connections to Beauvais and Le Tréport.