Odo I (French: Eudes; also Hodo, Uodo, or Udo in contemporary Latin; died 25 May 834) was the Count of Orléans (comes Aurelianensium) following the final deposition of Matfrid until his own deposition a few years later.

He belonged to the Udalriching family and was a son of Adrian,^{[citation needed] [1]} who had also held the county of Orléans, and possibly of Waldrada, a Nibelungid. In 811, as count (comes), according to the Annales Fuldenses, he signed a peace treaty with the Vikings.

According to the Vita Hludowici, in 827, he was named to replace the deposed Matfrid in Orléans. Odo, along with Heribert, a relative, possibly his cousin, were exiled in April 830 by Lothair I and Orléans was confiscated. Matfrid was reinstated.

In 834, while fighting Matfrid and Lambert I of Nantes, partisans of Lothair, Odo was killed as were his brothers William, Guy of Maine, and Theodo, abbot of Saint Martin of Tours.^{[lower-alpha 1]}

Odo's wife was Engeltrude de Fézensac.^[3] Their eldest daughter, Ermentrude, married Charles the Bald of West Francia.^[4] He left a son William who was executed by his own brother-in-law in 866.