Justoc of Vannes

Justoc of Vannes (Iustoc, Justok) was bishop of Vannes in Brittany in the 8th century, and reposed around 756. He is regarded locally as a saint, in the Western Church.

The Gallia Christiana does not mention him. According to the episcopal lists of Augustin du Paz and Albert le Grand he was the twentieth, or the twenty-⁠seventh, bishop of Vannes. His episcopate follows that of Gobrien, who died around 725. No other deeds, writings or day of commemoration survive.