Renaud Gagneux (15 May 1947 – 24 January 2018) was a French composer. He was born in Paris. Gagneux studied piano with Alfred Cortot and composition with Henri Dutilleux at the École Normale in Paris. In 1966 he went to Cologne to study composition with Karlheinz Stockhausen, then with André Jolivet and Olivier Messiaen at the Conservatoire de Paris.
In 1972 he joined the Groupe de Recherches Musicales de l'ORTF. His many prizes include the Sacem Grand Prix for chamber music (1977), the Prix Georges Enesco (1983), the Prize for New Talent from the SACD (1989), the Composers' Prize of the Sacem (1990), and the SACEM Grand Prix 1993 for his works overall.