| Jurisdiction: | Diocese |
| Viana | |
| Latin: | Dioecesis Viananensis |
| Country: | Angola |
| Metropolitan: | Archdiocese of Luanda |
| Denomination: | Catholic |
| Rite: | Roman |
| Established: | 2007 |
| Cathedral: | Catedral Sé Catedral de São Francisco de Assis |
| Bishop: | Emílio Sumbelelo, |
| Emeritus Bishops: | Joaquim Ferreira Lopes, OFMCap |
The Roman Catholic Diocese of Viana (Latin: Dioecesis Viananensis) is a diocese located in the city of Viana in the ecclesiastical province of Luanda in Angola.