The Roman Catholic Diocese of Viana () is a diocese located in the city of Viana in the ecclesiastical province of Luanda in Angola.

History June 6, 2007: Established as Diocese of Viana from the Metropolitan Archdiocese of Luanda

Leadership Bishops of Viana (Roman rite) Bishop Joaquim Ferreira Lopes, OFMCap (June 6, 2007 - February 11, 2019) Bishop Emílio Sumbelelo (February 11, 2019 - )

See also Roman Catholicism in Angola

Sources GCatholic.org