Pope Hormisdas (Italian: Ormisda; 450 – 6 August 523) is the head of the Catholic Church from 20 July 514 to his death in 523.

His papacy is dominated by the Acacian schism, started in 484 by Emperor Acacius of Constantinople's efforts to placate the Monophysites.

His efforts to resolve this schism are successful, and on 28 March 519, the reunion between Constantinople and Rome is ratified in the cathedral of Constantinople before a large crowd.

Jeffrey Richards explains Hormisdas' Persian name as probably in honor of an exiled Persian noble, Hormizd, "celebrated in the Roman martyrology (8 August) but not so honored in the East."

The names of his father and son suggest he had an otherwise "straightforward Italian pedigree."

However, according to Iranica he was probably related to Hormizd.