The Diocese of Spokane is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Washington State in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Seattle.

The Archdiocese of Seattle is a Latin Church ecclesiastical territory, or archdiocese, of the Catholic Church in western Washington State in the United States. The Diocese was known as the Diocese of Nesqually from 1850 to 1907. The mother church of the archdiocese is St. James Cathedral in Seattle. The former cathedral is the Proto-Cathedral of St. James the Greater in Vancouver. Its archbishop since 2019 is Paul D. Etienne.