The Bishop of Saint-Omer was the ecclesiastical leader of the Diocese of Saint-Omer, located in northern France. This diocese was established in the 7th century and played a significant role in the Christianization of the region. The bishopric was known for its influence in local politics and its involvement in the broader affairs of the Catholic Church. The diocese was dedicated to Saint Audomare, also known as Saint Omer, who is the patron saint of the area. Over the centuries, the bishops contributed to the development of the local community, including the establishment of schools and churches. The diocese was eventually suppressed during the French Revolution in the late 18th century.