| Jurisdiction: | Diocese |
| Mafinga | |
| Latin: | Dioecesis Mafingensis |
| Metropolitan: | Mbeya |
| Parishes: | 17 |
| Rite: | Roman Rite |
| Sui Iuris Church: | Latin Church |
| Founded: | December 22, 2023 |
| Area Km2: | 11,016 |
| Catholics: | 236,299 |
| Population As Of: | 2023 |
| Population: | 617,770 |
| Bishop: | Vincent Cosmas Mwagala |
The Roman Catholic Diocese of Mafinga is a diocese located in Mafinga in the ecclesiastical province of Mbeya in Tanzania.
The Diocese of Mafinga was erected by Pope Francis from the Diocese of Iringa on December 22, 2023, and Vincent Cosmas Mwagala was named the first bishop.[1]