The Roman Catholic Diocese of Sanggau (Latin: Sanggauen(sis)) is a diocese located in the city of Sanggau in the ecclesiastical province of Pontianak in Indonesia.

• 9 April 1968: Established as the Apostolic Prefecture of Sekadau from the Metropolitan Archdiocese of Pontianak and Diocese of Ketapang
• 8 June 1982: Promoted as Diocese of Sanggau

• Bishops of Sanggau (Roman rite)
  • Bishop Valentinus Saeng, C.P. (18 June 2022 – present)
  • Bishop Giulio Mencuccini, C.P. (22 January 1990 – 18 June 2022)
• Prefects Apostolic of Sekadau (Roman Rite)
  • Fr. Domenico Luca Spinosi, C.P. (1 September 1972 – 1982)
  • Fr. Michael Di Simone, C.P. (31 July 1968 – 1972)

• GCatholic.org
• Catholic Hierarchy