Henri Meilhac (French pronunciation: [ɑ̃ʁi mɛjak]; 23 February 1830 – 6 July 1897) was a French dramatist and opera librettist, best known for his collaborations with Ludovic Halévy on Georges Bizet's Carmen and on the works of Jacques Offenbach, as well as Jules Massenet's Manon.

As a young man, he began writing fanciful articles for Parisian newspapers and comédies en vaudevilles, in a vivacious boulevardier spirit which brought him to the forefront.

About 1860, Meilhac met Ludovic Halévy, and their collaboration for the stage lasted twenty years.

However, Meilhac's work is most closely tied to the music of Jacques Offenbach, for whom he wrote over a dozen librettos, most of them together with Halévy.

Other librettos by Meilhac include Jules Massenet's Manon (with Philippe Gille) (1884), Hervé's Mam'zelle Nitouche (1883), and Rip, the French version of Robert Planquette's operetta Rip Van Winkle (also with Gille).