Béarn (US: /beɪˈɑːrn/; French: [beaʁn] ; Occitan: Bearn [beˈaɾ] or Biarn; Basque: Bearno or Biarno; Latin: Benearnia or Bearnia) is one of the traditional provinces of France, located in the Pyrenees mountains and in the plain at their feet, in Southwestern France. Along with the three Basque provinces of Soule, Lower Navarre and Labourd, the Principality of Bidache, as well as small parts of Gascony, it forms the current Pyrénées-Atlantiques department. The capitals of Béarn were successively Beneharnum (until 841), Morlaàs (from c. 1100), Orthez (from the second half of the 13th century) and then Pau (beginning in the mid-15th century).
Béarn is bordered by the Basque provinces of Soule and Lower Navarre to the west, Gascony (Landes and Armagnac) to the north, Bigorre to the east, in addition to Spain (Aragon) to the south.