The Diocese of Catarman (Lat: Dioecesis Catarmaniensis) is a Latin Church ecclesiastical jurisdiction or diocese of the Catholic Church in the Philippines. Erected in 1974, the diocese is a suffragan in the ecclesiastical province of the metropolitan Archdiocese of Palo. The Diocese of Catarman has experienced no jurisdictional changes since its establishment. Nolly Buco, who currently serves as the auxiliary bishop of Antipolo, was appointed apostolic administrator by Pope Francis when Bishop Emmanuel Trance retired as bishop of the diocese on 8 December 2023. Trance is from Calinog, Iloilo under the Archdiocese of Jaro. In 18 October 2024, Pope Francis subsequently appointed him as the third bishop of Catarman.

Ordinaries