The Roman Catholic Diocese of Sibolga (Latin: Sibolgaen(sis)) is a diocese located in the city of Sibolga in the ecclesiastical province of Medan in Indonesia.

• 17 November 1959: Established as the Apostolic Prefecture of Sibolga from the Apostolic Vicariate of Medan
• 24 October 1980: Promoted as Diocese of Sibolga

• Bishops of Sibolga (Roman rite)
  • Bishop Fransiskus Tuaman Sinaga (6 March 2021 – present)
  • Bishop Ludovikus Simanullang, OFMCap (14 March 2007 – 20 September 2018)
  • Bishop Anicetus Bongsu Antonius Sinaga, OFMCap (later Archbishop) (24 October 1980 – 3 January 2004)
• Prefects Apostolic of Sibolga (Roman Rite)
  • Fr. Anicetus Bongsu Antonius Sinaga, OFMCap (later Archbishop) (1978 – 24 October 1980)
  • Bishop Peter G. Grimm, OFMCap (17 November 1959 – 1971)

• GCatholic.org
• Catholic Hierarchy