Odo of Vitry (Eudes) (died 1158) was a French nobleman.
It is sometimes stated that he was a son of André, castellan of Vitré and of Agnès de Mortain, but this appears to be based on a confusion between Vitré in Brittany and Vitry in Champagne.
On the death of his brother-in-law, Gervase, he received the county of Rethel.
[1] Odo was married to Matilda (d. 1151), the eldest daughter of Hugh I, Count of Rethel.
[1] They had at least four children: From 1124 until his wife's death in 1151, he ruled Rethel jointly with her.