Sergius I
# Sergius I

Sergius I may refer to:

* Sergius of Tella, Patriarch of the Syriac Orthodox Church in 544–546
* Sergius I of Constantinople (died in 638)
* Pope Sergius I (died in 701), Sicilian-born pope
* Sergius I of Naples (died 864)
* Sergius I of Amalfi (died 966)
* Patriarch Sergius I of Moscow (1867–1944)
