Dionysius II

Dionysius II may refer to:


 * Dionysius II of Syracuse (c. 397 BC – 343 BC), 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 (1742–1816), Malankara Metropolitan 1815–1816