Audomar (died c. 670), better known as Omer, was a bishop of Thérouanne, after whom nearby Saint-Omer in northern France was named.

Audomar was born of a distinguished family of Coutances, then under the Frankish realm of Neustria, towards the close of the 6th or the beginning of the 7th century.

In 649 or 651, Audomar received twelve estates, including Sithiu where he established three missionaries who came from Austrasia and spoke the local language.

[4] The Abbot of Luxeuil sent to his assistance several monks, among whom are mentioned Bertin, Mommolin, and Ebertran.

The place of his burial is uncertain; most probably he was laid to rest in the church of Our Lady, later Saint-Omer Cathedral, where there is a 13th-century cenotaph dedicated to him.