The Dauphiné (UK: /ˈdoʊfɪneɪ, ˈdɔːf-/ DOH-fin-ay, DAW-, US: /ˌdoʊfiːˈneɪ/ DOH-fee-NAY, French: [dofine]; Occitan: Daufinat or Dalfinat; Arpitan: Dôfenât or Darfenât), traditionally known in English as Dauphiny, is a former province in southeastern France during the Ancien régime, whose area roughly corresponded to that of the present-day departments of Isère, Drôme and Hautes-Alpes. The Dauphiné was originally the Dauphiné of Viennois.
In the 12th century, the local ruler Count Guigues IV of Albon (c. 1095–1142) bore a dolphin on his coat of arms and was nicknamed le Dauphin (French for 'dolphin'). His descendants changed their title from Count of Albon to Dauphin of Viennois. The state took the name of Dauphiné. It became a state of the Holy Roman Empire in the 11th century.