The Roman Catholic Diocese of Chalan Kanoa is an ecclesiastical territory or diocese of the Catholic Church in the United States. It comprises the territory of the Commonwealth of the Northern Mariana Islands and is a suffragan of the Metropolitan Archdiocese of Agaña.
The diocese was canonically erected on 8 November 1984 by Pope John Paul II. Its territories were taken from the archdiocese based in Guam. The Diocese of Chalan Kanoa is led by a prelate bishop who pastors the mother church, the Our Lady of Mount Carmel Cathedral on Saipan.
