Léon Halévy (4 January 1802 – 2 September 1883) was a French civil servant, historian, and dramatist.
Halévy became a disciple and collaborator of Saint-Simon, aiding in the foundation of his journal, Le Producteur, and writing the introduction to his work, Opinions Littéraires, Philosophiques et Industrielles, in which Olinde Rodrigues and Étienne-Martin Bailly also assisted.
In 1831, Halévy became an assistant professor of French literature at the Ecole Polytechnique, where there was some discrimination against Jews.
In 1837, Halévy was attached to the Ministry of Public Instruction as chief of the bureau of scientific societies, and remained there until his retirement in 1853, after which he devoted the remainder of his life to literature, writing a large number of poems, translations, plays, and other works.
Another son, sired by Léon's liaison with an opera singer, was the politician Lucien-Anatole Prévost-Paradol.