Saint Domitius was an 8th-century deacon associated with the church in Amiens, France. Originally a canon at Notre-Dame of Amiens, he eventually renounced his position to pursue a solitary existence. He lived as a hermit at Saint-Acheul, situated along the banks of the Avre river. During his time as a recluse, he is noted for offering spiritual direction to Saint Ulphia.