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 Rangabe, Byzantine Emperor
- Michael I Cerularius, Patriarch Michael I of Constantinople
- Michael I of Duklja, Prince and King of Duklja and
- Mikhail of Vladimir
- Michael I Komnenos Doukas
- Michael I of Russia
- Michael I of Poland, King of Poland and Grand Duke of Lithuania
- Michael I of Portugal
- Michael I of Serbia
- Mihály Cseszneky de Milvány et Csesznek, Michael I of Macedonia
- Michael I of Romania
- Michael I, regnal name of conclavist antipope David Bawden