Mons-en-Barœul (French pronunciation: [mɔ̃s ɑ̃ baʁœl]) is a commune in the Nord department in northern France.

[3] It is a suburb of the city of Lille, and is adjacent to it on the northeast.

Plans of the eighteenth century show Mons-en-Barœul as a small village without a church, with farms scattered along the high road from Lille to Roubaix.

It is a former dependency of Fives, a district which is now part of Lille.

(Flesquières, Gonnelieu, Mons-en-Barœul and Viesly use the same arms.)