Samuil Vulcan (1 August 1758 – 25 December 1839) was the Bishop of the Diocese of Oradea Mare of the Romanian Greek Catholic Church from 1806 to 1839.

Vulcan was born on 1 August 1758[1] in Veza, a former village which has since been incorporated into Blaj town.

[2] On 25 October 1806 he was designated Greek Catholic bishop of Oradea the Austrian government and so confirmed by the Vatican on 25 March 1807.

During his reign the diocese of Oradea enjoyed an increase in the number of parishes and faithfuls, passing from 26,232 parishioners to 153,163 souls.

[4] He tried to ensure a regular wage to his priests, and he focused on the instruction, founding many schools.