The Roman Catholic Diocese of San Bartolomé de Chillán (Latin: Sancti Bartholomaie de Chillán) is a diocese located in the city of Chillán in the ecclesiastical province of Concepción in Chile. (The diocese name was changed on 1 November 2017.)

• 1916: Established as Mission “sui iuris” of Chillán from the Diocese of Concepción
• 18 October 1925: Promoted as Diocese of Chillán
• 1 November 2017: Renamed as Diocese of San Bartolome de Chillán

Bishops of San Bartolome de Chillán

• Bishop Sergio Hernán Pérez de Arce Arriagada, SS.CC. (6 February 2020 – 16 May 2024)
• Bishop Carlos Pellegrín Barrera, S.V.D. (1 November 2017 – 21 September 2018)

Bishops of Chillán

• Bishop Carlos Pellegrín Barrera, S.V.D. (25 March 2006 – 1 November 2017)
• Bishop Alberto Jara Franzoy (30 April 1982 – 25 March 2006)
• Bishop Francisco José Cox Huneeus (14 December 1974 – 9 November 1981), appointed Coadjutor Archbishop of La Serena
• Bishop Eladio Vicuña Aránguiz (28 August 1955 – 16 July 1974), appointed Archbishop of Puerto Montt
• Bishop Jorge Larraín Cotapos (20 March 1937 – 10 August 1955)
• Bishop Martín Rucker Sotomayor (14 December 1925 – 6 January 1935)
• Bishop Martín Rucker Sotomayor (Apostolic Administrator 16 March 1923 – 14 December 1925)
• Fr. Luis A. Venegas Henríquez (Apostolic Administrator 1922 – 1924)
• Fr. Zacarías Muñoz Henríquez (Apostolic Administrator 1920 – 1921)
• Bishop Reinaldo Muñoz Olave (Apostolic Administrator 1 March 1916 – 1920)

• GCatholic.org
• Catholic Hierarchy
• Diocese website

36°36′24″S 72°06′08″W / 36.6068°S 72.1021°W / -36.6068; -72.1021