Hugh (or Hugo) (c. 780 – 837) was the count of Tours and Sens during the reigns of Charlemagne and Louis the Pious, until his disgrace in February 828.
He appeared in 811 as an envoy or ambasciator to Constantinople with Haido, Bishop of Basel, and Aio, Duke of Friuli, to renew the Pax Nicephori.
In 827, Hugh, along with Matfrid of Orléans, was commissioned by Louis to recruit an army with his son Pepin I of Aquitaine and repel the invasion of the Marca Hispanica by the Moslem general Abu Marwan.
Barcelona being the greatest military accomplishment of Louis' career, the Spanish March meant much to him and Hugh and Matfrid found themselves greatly disfavoured at court.
News of their deaths—and that of Wala of Corbie in an earlier Italian epidemic in the fall of the previous year—greatly distressed Louis the Pious, but the opponents of Lothair interpreted it as divine judgement.