Paschasius of Vienne was an early fourth-century bishop residing in the Dauphiné region of France. Historical chronologies typically position his leadership between those of Saint Simplicius and Saint Claudius. He is recognized as a highly skilled orator, and he reportedly served as a mentor to Justus, who later became the bishop of Lyon. His historical significance is occasionally linked to a papal bull from Pope Sylvester I, which allegedly granted him authority over seven provinces, though the legitimacy of this document remains debated.