Cambrai ([kɑ̃bʁɛ]; Dutch: Kamerijk; German: Kamerich; old spelling Cambray) is a commune in the Nord department in northern France on the Escaut river. It is a sub-prefecture of the department.

Cambrai is the seat of an archdiocese whose jurisdiction was immense during the Middle Ages. The territory of the Bishopric of Cambrai, roughly coinciding with the shire of Brabant, included the central part of the Low Countries. The bishopric had some limited secular power.

Cambrai was the Duke of Wellington's headquarters, for the British Army of Occupation, from 1815 to 1818.

The Battle of Cambrai (20 November 1917 – 3 December 1917), a campaign of World War I took place there. It was noted for the first successful use of tanks. A second Battle of Cambrai took place between 8 October 1918 – 10 October 1918 as part of the Hundred Days Offensive.