Henri Trianon (11 July 1811 in Paris – 17 October 1896 in Paris) was a French critic, librettist and translator of works by Homer and Plato, and operas by Weber and Mozart into French.^[1] He was an artistic and literary critic in Paris who eventually became teacher. In 1842 he became under-librarian and then librarian at Sainte Geneviève in 1849.^[2] From 1857-59 Trianon was associated with Nestor Roqueplan in the administration of the Opéra-Comique.

He also wrote the libretto to the ballet Orfa by Adolphe Adam and several others, including Le Maître à Chanter (1853) by Armand Limnander,^[3] Pantagruel (1855) by Théodore Labarre, Les Bleuets (1867) by Jules Cohen, and Ivan IV by Bizet, which he co-wrote once it had been refused by Charles Gounod.^[4]