Jean-Louis Petit (born 20 August 1937) is a French composer, conductor and organist.
He joined courses in conducting with Léon Barzin at the Schola Cantorum, Franco Ferrara in Venice, Igor Markevitch in Madrid, Monaco und Santiago, Chile and Pierre Boulez in Basel.
He founded many orchestras in France and conducted the Orchestre de Reims, with which he traveled to Belgium and Germany.
Petit signed with Decca Records in 1964 and conducted the series Collection Grand Siècle.
Petit founded the Atelier Musique in Ville-d'Avray to perform contemporary classical music.