Béarn (French pronunciation: [be.aʁn]; Gascon: Bearn or Biarn; Basque: Bearno) is one of the traditional provinces of France, located in the Pyrenees mountains and in the plain at their feet, in southwest France. Along with the three Basque provinces of Soule, Lower Navarre, and Labourd, the principality of Bidache, as well as small parts of Gascony and Bigorre, it forms in the southwest the current département of Pyrénées-Atlantiques (64). The capitals of Béarn were Beneharnum (until 841), Morlaàs (starting ca. 1100), Orthez (starting second half of 13th century), then Pau (beginning in the mid 15th century).

Béarn is bordered by Basque provinces Soule and Lower Navarre to the west, by Gascony (Landes and Armagnac) to the north, by Bigorre to the east, and by Spain (Aragon) to the south.

The name Béarn comes from Beneharnum, the capital city of the Venarni people, destroyed by Vikings by 840.

Today, the mainstays of the Béarn area are the petroleum business, the aerospace industry through the helicopter manufacturer Turbomeca, tourism and agriculture (much of which is corn grown for seed). Pau was the birthplace of Elf Aquitaine, which has now become a part of Total petroleum company.