Dauphin of France (/ˈdɔːfɪn/, also UK: /dɔːˈfɪn, ˈdoʊfæ̃/ US: /ˈdoʊfɪn, doʊˈfæ̃/; French: Dauphin de France [dofɛ̃ də fʁɑ̃s] ), originally Dauphin of Viennois (Dauphin de Viennois), was the title given to the heir apparent to the throne of France from 1350 to 1791, and from 1824 to 1830. The word dauphin is French for dolphin and was the hereditary title of the ruler of the Dauphiné of Viennois. While early heirs were granted these lands to rule, eventually only the title was granted.
The wife of the Dauphin was known as la Dauphine.