The Roman Catholic Diocese of Mtwara (Latin: Dioecesis Mtuarana) is a diocese located in Mtwara in the ecclesiastical province of Songea in Tanzania.

• December 22, 1931: Established as Territorial Abbacy of Mtwara from the Roman Catholic Diocese of Lindi
• December 18, 1972: Promoted as Diocese of Mtwara

• Territorial Abbots of Mtwara (Roman rite)
  • Bishop Joachim Ammann, O.S.B. (1932.05.29 – 1948.12.15)
  • Bishop Anthony Victor Hälg, O.S.B. (1949.12.15 – 1972)
• Bishops of Mtwara (Roman rite)
  • Bishop Maurus Libaba (1972.12.18 – 1986.10.17), appointed Bishop of Lindi
  • Bishop Gabriel Mmole (1988.03.12 - 2015.10.15)
  • Bishop Titus Joseph Mdoe (since 2015.10.15)

• Anthony Victor Haelg (Hälg), O.S.B. (1949)

• Roman Catholicism in Tanzania

• Catholic Hierarchy

• GCatholic.org
• Catholic Hierarchy

10°16′25″S 40°10′58″E / 10.273611°S 40.182778°E / -10.273611; 40.182778