The Roman Catholic Diocese of Copiapó (Latin: Copiapoën(sis)) is a diocese located in the city of Copiapó in the ecclesiastical province of La Serena in Chile.

• 9 November 1946: Established as Apostolic Administration of Copiapó
• 21 April 1955: Promoted as Territorial Prelature of Copiapó
• 31 October 1957: Promoted as Diocese of Copiapó

• Bishop Ricardo Basilio Morales Galindo, O. de M. (2020.06.20 – present)
• Bishop Celestino Aós Braco, O.F.M. Cap. (2014.10.18 – 2019.03.23), appointed Apostolic Administrator of Santiago de Chile
• Bishop Gaspar Quintana Jorquera, C.M.F. (2001.05.26 – 2014.07.25)
• Bishop Fernando Ariztía Ruiz (1976.12.11 – 2001.05.26)
• Bishop Carlos Marcio Camus Larenas (1968.01.31 – 1976.12.11), appointed Bishop of Linares
• Bishop Juan Francisco Fresno Larraín (1958.06.15 – 1967.06.28), appointed Archbishop of La Serena; future Cardinal
• Bishop Francisco de Borja Valenzuela Ríos (1955.06.27 – 1957.08.20), appointed Bishop of Antofagasta; future Archbishop
• Archbishop Alfredo Cifuentes Gómez (Apostolic Administrator 1947.03.19 – 1948.06.17)

• GCatholic.org
• Catholic Hierarchy
• Diocesan website

27°21′58″S 70°20′00″W / 27.3661°S 70.3333°W / -27.3661; -70.3333