Valerius of Trier was a 4th-century bishop who served the early Christian community in Trier, located in ancient Gaul. According to historical tradition, he was a companion to Saint Eucharius, the first bishop of the region, and served as his successor. While some accounts of his life are considered semi-legendary, he is recognized as a significant figure in the early establishment of the church in the Rhineland area. He is commemorated as a saint within the Catholic tradition.