Louis Gallet (14 February 1835, Valence, Drôme – 16 October 1898) was a French writer of operatic libretti, plays, romances, memoirs, pamphlets, and innumerable articles, who is remembered above all for his adaptations of fiction—and Scripture— to provide librettos of cantatas and opera, notably by composers Georges Bizet, Camille Saint-Saëns and Jules Massenet.