Odo was the eldest son of Robert the Strong, who was duke of the Franks, margrave of Neustria, and count of Anjou. After his father's death at the Battle of Brissarthe in 866, Odo inherited the Margraviate of Neustria. Odo lost this title in 868 when King Charles the Bald appointed Hugh the Abbot to the title. Odo regained it following the death of Hugh in 886. After 882 he was the count of Paris. Odo was also the lay abbot of St. Martin of Tours.