Patriarch Theodosius may refer to:

• Theodosius, Syriac Orthodox Patriarch of Jerusalem (f. 451–453)
• Theodosius, Greek Orthodox Patriarch of Jerusalem (r. 862–878)
• Theodosius Romanus, Syriac Orthodox Patriarch of Antioch (r. 887–896)
• Theodosius I, Ecumenical Patriarch of Constantinople (r. 1179–1183)
• Theodosius I, Patriarch of Alexandria (r. 535–536)
• Theodosius II, Greek Orthodox Patriarch of Alexandria (c. 12th century)
• Theodosius II, Ecumenical Patriarch of Constantinople (r. 1769–1773)

This disambiguation page lists articles associated with the title Patriarch Theodosius.
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