Paul I may refer to:
Paul of Samosata (200–275), Bishop of Antioch Paul I of Constantinople (died c. 350), Archbishop of Constantinople Pope Paul I (700–767) Paul I Šubić of Bribir (c. 1245–1312), Ban of Croatia and Lord of Bosnia Paul I, Serbian Patriarch, Archbishop of Peć and Serbian Patriarch (c. 1530–1541) Paul I of Russia (1754–1801), Emperor of Russia Paul Peter Massad (1806–1890), Maronite Patriarch of Antioch Paul of Greece (1901–1964), King of Greece Pavle, Serbian Patriarch (1914–2009), Patriarch of the Serbian Orthodox Church
See also Patriarch Paul I (disambiguation)