Michael I

Michael I may refer to:

• Pope Michael I of Alexandria, Coptic Pope of Alexandria and Patriarch of the See of St. Mark in 743–767
• Michael I Rhangabes, Byzantine Emperor (died in 844)
• Michael I Cerularius, Patriarch Michael I of Constantinople (c. 1000–1059)
• Michael I of Duklja, Prince and King of Duklja and (d. 1081)
• Mikhail of Vladimir (died in 1176)
• Michael I Komnenos Doukas (died in 1215)
• Michael I of Russia (1596–1645)
• Michael I of Poland (Michał Korybut Wiśniowiecki), King of Poland and Grand Duke of Lithuania (1640-1673)
• Michael of Portugal (1802–1866)
• Michael I of Serbia (1823–1868)
• Michael Cseszneky de Milvany, Michael I of Macedonia (1910–1975)
• Michael I of Romania (1921–2017)
• Michael I, regnal name of conclavist antipope David Bawden (1959-2022)