The Roman Catholic Diocese of Queenstown (Latin: Queenstovnen(sis)) is a diocese located in the town of Queenstown in the ecclesiastical province of Cape Town in South Africa.

• 1928: Established as Mission “sui iuris” of Queenstown from the Apostolic Vicariate of Cape of Good Hope, Eastern District
• March 29, 1938: Promoted as Apostolic Prefecture of Queenstown
• April 9, 1948: Promoted as Apostolic Vicariate of Queenstown
• January 11, 1951: Promoted as Diocese of Queenstown

• The cathedral is Cathedral of Christ the King in Queenstown.

• Prefect Apostolic of Queenstown
  • Fr. John Baptist Rosenthal, S.A.C. (1940.02.09 – 1948.04.09 see below)
• Vicar Apostolic of Queenstown
  • Bishop John Baptist Rosenthal, S.A.C. (see above 1948.04.09 – 1951.01.11 see below)
• Bishops of Queenstown
  • Bishop John Baptist Rosenthal, S.A.C. (see above 1951.01.11 – 1972.02.03)
  • Bishop John Baptist Rosner, S.A.C. (1972.02.03 – 1984.02.03)
  • Bishop Herbert Nikolaus Lenhof, S.A.C. (1984.02.03 – 2009.11.16)
  • Bishop Dabula Mpako (2011.05.23 – 2019.04.30), appointed Archbishop of Pretoria and Bishop of South Africa, Military
  • Bishop Paul Siphiwo Vanqa, S.A.C. (2021.03.03 – ...)

• Sithembele Anton Sipuka, appointed Bishop of Umtata in 2008

• Roman Catholicism in South Africa

• GCatholic.org
• Catholic Hierarchy

31°54′00″S 26°53′00″E / 31.9000°S 26.8833°E / -31.9000; 26.8833