Jean Wiener (or Wiéner) (19 March 1896, 14th arrondissement of Paris – 8 June 1982, Paris) was a French pianist and composer. Wiener was trained at the Conservatoire de Paris, where he studied alongside Darius Milhaud, and worked with Erik Satie.

He then embarked on a career as concert impresario, composer and pianist. He was the house pianist at the Gaya bar, and later at Le Boeuf sur le Toit. In 1924, a chance encounter with Clement Doucet (who succeeded him at Le Boeuf) brought him into the world of popular music.