The Roman Catholic Diocese of Tanga (Latin: Dioecesis Tangaënsis) is a diocese located in the city of Tanga in the ecclesiastical province of Dar-es-Salaam in Tanzania.

• April 18, 1950: Established as Apostolic Prefecture of Tanga from the Apostolic Vicariate of Kilima-Njaro
• February 24, 1958: Promoted as Diocese of Tanga

• Prefect Apostolic of Tanga (Roman rite)
  • Fr. Eugène Cornelius Arthurs, I.C. (1950.06.09 – 1958.02.24 see below)
• Bishops of Tanga (Roman rite)
  • Bishop Eugène Cornelius Arthurs, I.C. (see above 1958.02.24 – 1969.12.15)
  • Bishop Maurus Gervase Komba (1969.12.15 – 1988.01.18)
  • Bishop Telesphore Mkude (1988.01.18 – 1993.04.05), appointed Bishop of Morogoro
  • Bishop Anthony Mathias Banzi (1994.06.10 – 2020.12.20)

• Titus Joseph Mdoe, appointed auxiliary bishop of Dar-es-Salaam in 2013

• Roman Catholicism in Tanzania

• GCatholic.org
• Catholic Hierarchy

6°48′00″S 39°17′00″E / 6.8°S 39.2833°E / -6.8; 39.2833