The Roman Catholic Diocese of Comodoro is located in the city of Comodoro, in the Patagonian province of Chubut in southern Argentina.

The Roman Catholic Diocese of Comodoro Rivadavia encompasses 234,000 km² (90,382 Square Miles) of central Patagonia covering the Province of Chubut. The Diocese was founded in 1957 from part of the Diocese of Viedma. In 1961, its southern half became the separate Diocese of Río Gallegos. In 2009, part of the diocese became the Territorial Prelature of Esquel. It is a suffragan see to the Archdiocese of Bahía Blanca.

The Cathedral is located in the city of Comodoro Rivadavia. It is dedicated to San Juan Bosco, the only cathedral in the world dedicated to the founder of the Salesian Order. It was inaugurated in 1979, although the crypt had been dedicated in 1949.

In 2024 the Apostolic Administrator, bishop Roberto Álvarez, described the religious landscape of Patagonia as mission territory. "The Patagonian Church is special, and very different from the rest of Argentina. For example, we are a land of evangelisation, a mission country. This region does not have deep Christian roots".

The Roman Catholic Bishop of Comodoro Rivadavia is a prelate bishop of the Roman Catholic Church in Argentina.

• Carlos Mariano Pérez Eslava S.D.B.(13 March 1957 – 26 December 1963, appointed Archbishop of Salta)
• Eugenio Santiago Peyrou S.D.B. (24 June 1964 – 19 February 1974)
• Argimiro Daniel Moure Piñeiro S.D.B. (5 April 1975 – 8 September 1992)
• Pedro Luis Ronchino S.D.B. (30 January 1993 – 19 February 2005)
• Virginio Domingo Bressanelli S.C.I. (19 February 2005 – 10 February 2010); appointed Coadjutor Bishop of the Diocese of Neuquen
• Joaquin Gimeno Lahoz (15 July 2010 – present); formerly Vicar General of the diocese

• Mario Picchi, S.D.B. (1970-1975), appointed Auxiliary Bishop of La Plata
• Fernando Martín Croxatto (2014-2017), appointed Bishop of Neuquén
• Roberto Pío Álvarez (2017-
• Alejandro Pablo Benna]] (2017-

• Catholic Church in Argentina

• Catholic Hierarchy: Diocese of Comodoro Rivadavia
• Comodoro Rivadavia Diocese Archived 2019-01-09 at the Wayback Machine (Spanish)

45°51′44″S 67°29′07″W / 45.8623°S 67.4853°W / -45.8623; -67.4853