Abbo of Auxerre was a 9th-century Benedictine monk and bishop who served the see of Auxerre. After living as a monk and later as an abbot at the Abbey of Saint-Germain d'Auxerre, he succeeded his brother, Heribald, to the bishopric. He eventually stepped down from his position as bishop in 859. His life concluded following his participation in the synod of Poncy in 860, where he died on 3 December.