Patriarch Cosmas may refer to:

• Cosmas I of Alexandria, Greek Patriarch of Alexandria in 727–768
• Cosmas I of Constantinople, Ecumenical Patriarch in 1075–1081
• Cosmas II of Constantinople, Ecumenical Patriarch in 1146–1147
• Cosmas II of Alexandria, Greek Patriarch of Alexandria in 1723–1736
• Cosmas III of Constantinople, Ecumenical Patriarch in 1714–1716
• Cosmas III of Alexandria, Greek Patriarch of Alexandria in 1737–1746

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