L'isola disabitata (The desert island), Hob. 28/9, is the tenth opera (azione teatrale in due parte) composed by Joseph Haydn. It was written for the Eszterházy court and premiered on 6 December 1779. The libretto by Metastasio, the only one by that author Haydn set, was previously used in operas by Giuseppe Bonno and Manuel García.