Marquise () is a commune in the Pas-de-Calais department in the Hauts-de-France region of France about northeast of Boulogne. The river Slack flows through the commune.
Part of the Flemish-speaking territory until 1346, Marquise became an English county under King Edward III after the battle of Crécy and the hexagonal bell-tower goes back to the English period. In 1420, in the suburbs of Marquise, at Leulinghen, the church of which was divided by the French-English border, King Henry V married Catherine of Valois, daughter of Charles VI of France.
Marquise received national media attention in autumn 2006 when the local police retrieved a painting by Maurice Boitel, stolen forty years before and taken out of France.