The Roman Catholic Diocese of Viana () is a diocese located in the city of Viana, in the ecclesiastical province of São Luís do Maranhão in Brazil.
History 30 October 1962: Established as Diocese of Viana from the Metropolitan Archdiocese of São Luís do Maranhão
Leadership Bishops of Viana (Roman rite), in reverse chronological order Bishop Evaldo Carvalho dos Santos, C.M. (2019.02.20 – present) Bishop Sebastião Lima Duarte (2010.07.07 – 2017.12.20), appointed Bishop of Caxias do Maranhão Bishop Xavier Gilles de Maupeou d’Ableiges (1998.02.18 – 2010.07.07) Bishop Adalberto Paulo da Silva, O.F.M. Cap. (1975.04.03 – 1995.05.24) Bishop Francisco Hélio Campos (1969.04.14 – 1975.01.23) Bishop Amleto de Angelis, M.S.C. (1963.05.30 – 1967.02.25)
References GCatholic.org Catholic Hierarchy