Joseph Étienne Frédéric Mistral (French: [mistʁal]; Occitan: Josèp Estève Frederic Mistral, 8 September 1830 – 25 March 1914) was a French writer of Occitan literature and lexicographer of the Provençal form of the language. He received the 1904 Nobel Prize in Literature "in recognition of the fresh originality and true inspiration of his poetic production, which faithfully reflects the natural scenery and native spirit of his people, and, in addition, his significant work as a Provençal philologist". Mistral was a founding member of the Félibrige and member of the Académie de Marseille.

His name in his native language was Frederi Mistral (Mistrau) according to the Mistralian orthography or Frederic Mistral (or Mistrau) according to the classical orthography.

Mistral's fame was owing in part to Alphonse de Lamartine who sang his praises in the 40th edition of his periodical Cours familier de littérature, following the publication of Mistral's long poem Mirèio. Alphonse Daudet, with whom he maintained a long friendship, eulogized him in "Poet Mistral", one of the stories in his collection Letters from My Windmill (Lettres de mon moulin).