Ordinaries ; Vicars Apostolic of Unianyembé (Roman rite) •
François Gerboin, M. Afr. (1897.01.28 – 1912.06.27) •
Henri Léonard, M. Afr. (1912.06.27 – 1925.05.31
see below) ; Vicars Apostolic of Tabora (Roman rite) •
Henri Léonard, M. Afr. (
see above 1925.05.31 – 1928.07.23) •
Edouard Michaud, M. Afr. (1928.11.29 – 1932.03.24), appointed Coadjutor Vicar Apostolic of Uganda •
Joseph Trudel, M. Afr. (1933.04.25 – 1949.02.04) • Cornelius Bronsveld, M. Afr. (1950.05.31 – 1953.03.25
see below) ; Metropolitan Archbishops of Tabora (Roman rite) •
Cornelius Bronsveld,
M. Afr. (
see above 1953.03.25 – 1959.12.21) •
Marko Mihayo (1960.06.21 – 1985.03.09) •
Mario Epifanio Abdallah Mgulunde (1985.03.09 – 2006.03.14) •
Paul R. Ruzoka (25 November 2006 – 10 November 2023) •
Protase Cardinal Rugambwa (since 10 November 2023)
Coadjutor Vicar Apostolic •
Henri Léonard, M. Afr. (1912)
Auxiliary Bishop •
Bernard Mabula (1969–1972), appointed Bishop of Singida •
Josaphat Jackson Bududu (since 26 February 2025) ==Suffragan dioceses==