Dionysius II
Dionysius II may refer to:
- Dionysius II of Syracuse, tyrant of Syracuse
- Patriarch Dionysius II of Antioch, Syrian Orthodox Patriarch of Antioch in 896–909
- Patriarch Dionysius II of Constantinople, Ecumenical Patriarch in 1546–1556
- Mar Dionysius II, Malankara Metropolitan 1815–1816