The Archdiocese of Portland in Oregon is a Latin Church archdiocese of the Catholic Church in western Oregon in the United States.

François Norbert Blanchet was a French Canadian-born missionary priest and prelate of the Catholic Church who was instrumental in establishing the Catholic Church presence in the Pacific Northwest. He was one of the first Catholic priests to arrive in what was then known as the Oregon Country and subsequently became the first bishop and archbishop of the Archdiocese of Oregon City.