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

• April 21, 1964: Established as Diocese of Mahenge from Metropolitan Archdiocese of Dar-es-Salaam

• Bishops of Mahenge (Roman rite)
  • Bishop Elias Mchonde (1964.04.21 – 1969.06.13)
  • Bishop Nikasius Kipengele (1970.06.25 – 1971.12.07)
  • Bishop Patrick Iteka (1973.06.14 – 1993.08.22)
  • Bishop Agapiti Ndorobo (since 1995.03.03)

• Salutaris Melchior Libena, appointed auxiliary bishop of Dar-es-Salaam in 2010
• Filbert Felician Mhasi, appointed Bishop of Tunduru-Masasi in 2018

• Roman Catholicism in Tanzania

• GCatholic.org
• Catholic Hierarchy

9°00′00″S 36°40′00″E / 9°S 36.666667°E / -9; 36.666667