List of Catholic dioceses in Tanzania

The Roman Catholic Church in Tanzania is composed of 7 ecclesiastical provinces and 27 suffragan dioceses.

Ecclesiastical Province of Arusha

 * Archdiocese of Arusha
 * Diocese of Mbulu
 * Diocese of Moshi
 * Diocese of Same

Ecclesiastical Province of Dar-es-Salaam

 * Archdiocese of Dar-es-Salaam
 * Diocese of Morogoro
 * Diocese of Tanga
 * Diocese of Zanzibar
 * Diocese of Ifakara
 * Diocese of Mahenge

Ecclesiastical Province of Dodoma

 * Archdiocese of Dodoma
 * Diocese of Kondoa
 * Diocese of Singida

Ecclesiastical Province of Mbeya

 * Archdiocese of Mbeya
 * Diocese of Iringa
 * Diocese of Sumbawanga

Ecclesiastical Province of Mwanza

 * Archdiocese of Mwanza
 * Diocese of Bukoba
 * Diocese of Bunda
 * Diocese of Geita
 * Diocese of Kayanga
 * Diocese of Musoma
 * Diocese of Rulenge-Ngara
 * Diocese of Shinyanga

Ecclesiastical Province of Songea

 * Archdiocese of Songea
 * Diocese of Lindi
 * Diocese of Mbinga
 * Diocese of Mtwara
 * Diocese of Njombe
 * Diocese of Tunduru-Masasi

Ecclesiastical Province of Tabora

 * Archdiocese of Tabora
 * Diocese of Kahama
 * Diocese of Kigoma
 * Diocese of Mpanda