Dinorah, originally Le pardon de Ploërmel, is an 1859 French opéra comique in three acts with music by Giacomo Meyerbeer and a libretto by Jules Barbier and Michel Carré. The story takes place near the rural town of Ploërmel and is based on two Breton tales by Émile Souvestre, "La Chasse aux trésors" and "Le Kacouss de l'Armor", both published separately in 1850 in the Revue des deux mondes.

Giacomo Meyerbeer was a German opera composer, "the most frequently performed opera composer during the nineteenth century, linking Mozart and Wagner". With his 1831 opera Robert le diable and its successors, he gave the genre of grand opera 'decisive character'. Meyerbeer's grand opera style was achieved by his merging of German orchestra style with Italian vocal tradition. These were employed in the context of sensational and melodramatic libretti created by Eugène Scribe and were enhanced by the up-to-date theatre technology of the Paris Opéra. They set a standard which helped to maintain Paris as the opera capital of the nineteenth century.