French Flanders (French: Flandre française [flɑ̃dʁ(ə) fʁɑ̃sɛːz]; Dutch: Frans-Vlaanderen; West Flemish: Frans-Vloandern) is a part of the historical County of Flanders, where Flemish—a Low Franconian dialect cluster of Dutch—was (and to some extent, still is) traditionally spoken.

French Flanders consists, mostly, of flat marshlands in the coal-rich regions just south of the North Sea.

It comprises two areas: Once a part of ancient and medieval Francia from the inception of the Frankish kingdom (descended from the Empire of Charlemagne) under the Merovingian monarchs such as Clovis I, who was crowned at Tournai, Flanders gradually fell under the control of the English and then Spanish, becoming part of the Spanish Netherlands and retained by Spain at the end of the Eighty Years' War.

Rich in coal, facing the North Sea, bordered by usually powerful neighbors, French Flanders has been fought over numerous times in the thousand years between the Middle Ages and World War II.

[2] In 2008, this part of France gained exposure to a wider international audience through the success of the movie Bienvenue chez les Ch'tis.