The Roman Catholic Diocese of Duque de Caxias () is a diocese located in the city of Duque de Caxias in the ecclesiastical province of São Sebastião do Rio de Janeiro in Brazil.
History 11 October 1980: Established as Diocese of Duque de Caxias from the Diocese of Nova Iguaçu and Diocese of Petrópolis
Leadership Bishops of Duque de Caxias (Latin Rite) Mauro Morelli (1981.05.25 – 2005.03.30) José Francisco Rezende Dias (2005.03.30 – 2011.11.30), appointed Archbishop of Niterói, Rio de Janeiro Tarcísio Nascentes dos Santos (since 2012.08.01)
References GCatholic.org Catholic Hierarchy Diocese website (Portuguese)