The Roman Catholic Diocese of Mbanza Congo (Latin: Dioecesis Mbanzacongensis) is a diocese located in the city of M'Banza Congo in the ecclesiastical province of Luanda in Angola.

• 7 November 1984: Established as Diocese of Mbanza Congo from the Diocese of Uíje

The Cathedral of the diocese is Sé Catedral de Nossa Senhora da Conceição (Cathedral Church of the Conception of Our Lady) in M'Banza Congo.

• Bishops of Mbanza Congo (Roman rite), in reverse chronological order
  • Bishop Vicente Carlos Kiaziku, OFMCap (5 January 2009–present)
  • Bishop Serafim Shyngo-Ya-Hombo, OFMCap (29 May 1992 – 5 January 2009)
  • Bishop Afonso Nteka, OFMCap (8 November 1984 – 10 August 1991)

• Roman Catholicism in Angola

• GCatholic.org

6°15′55″S 14°14′45″E / 6.2652°S 14.2457°E / -6.2652; 14.2457