Patriarch Sergius I
# Patriarch Sergius I

Patriarch Sergius I may refer to:

* Sergius of Tella, Syriac Orthodox Patriarch of Antioch in 544–546
* Sergius I of Constantinople, Ecumenical Patriarch in 610–638
* Sergius of Bulgaria, Patriarch of Bulgaria c. 931 – c. 940
* Patriarch Sergius of Moscow and All Russia, ruled in 1943–1944
