The Apostolic Vicariate of Tanganyika was a Catholic apostolic vicariate (missionary pre-diocesan jurisdiction) of the White Fathers missionary order at first centered on the mission of Karema in what is now Tanzania, that included parts of what are now Rwanda, Burundi, Democratic Republic of the Congo, Zambia and Malawi. As the number of missions, schools and converts grew, different regions became distinct vicariates covering portions of the original territory.