Brittany (French: Bretagne [bʁətaɲ] ( listen); Breton: Breizh, pronounced [brɛjs]; Gallo: Bertaèyn) is a cultural region in the north-west of France. Previously a kingdom and then a duchy, Brittany was united to the Kingdom of France in 1532 as a province. Brittany has also been referred to as Less, Lesser or Little Britain (as opposed to Great Britain). It is characterised as one of the six Celtic nations.

Brittany occupies a large peninsula in the north west of France, lying between the English Channel to the north and the Bay of Biscay to the south. Its land area is 34,023 km² (13,136 sq mi). The historical province of Brittany is divided into five departments: Finistère in the west, Côtes-d'Armor in the north, Ille-et-Vilaine in the north east, Loire-Atlantique in the south east and Morbihan in the south on the Bay of Biscay.