The Roman Catholic Diocese of Sumbe (Latin: Dioecesis Sumbensis) is a diocese located in the city of Sumbe in the ecclesiastical province of Luanda in Angola.

• 10 August 1975: Established as Diocese of Ngunza from the Metropolitan Archdiocese of Luanda
• 3 February 1977: Renamed as Diocese of Novo Redondo
• 22 October 2006: Renamed as Diocese of Sumbe

The Cathedral of the diocese is Sé Catedral de Nossa Senhora da Conceição (Our Lady of the Conception Cathedral) in Sumbe.

• Bishops of Sumbe (Roman rite), below
  • Bishop Luzizil Kiala (21 May 2013 – 29 September 2021), appointed Archbishop of Malanje
  • Bishop Benedito Roberto, C.S.Sp. (22 October 2006 – 19 May 2012), appointed Archbishop of Malanje; see below
• Bishops of Novo Redondo (Roman rite), below
  • Bishop Benedito Roberto, C.S.Sp. (15 December 1995 – 22 October 2006); see above
  • Bishop Zacarias Kamwenho (3 February 1977 – 3 March 1995.), appointed Coadjutor Archbishop of Luango; see below
• Bishop of Ngunza (Roman rite), below
  • Bishop Zacarias Kamwenho (10 August 1975 – 3 February 1977); see above

• Roman Catholicism in Angola

• GCatholic.org
• "Diocese of Sumbe". Catholic-Hierarchy.org. David M. Cheney.

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