Back Sergi I Catalan Sergios I. German Serge Ier French Sergio I Italian セルギウス1世 Japanese Sergius I Dutch Sérgio I Portuguese Сергий I (значения) Russian Сергій I (значення) Ukrainian
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)