The Roman Catholic Diocese of Petrópolis () is a diocese located in the city of Petrópolis in the ecclesiastical province of Niterói in Brazil.
History April 13, 1946: Established as Diocese of Petrópolis from the Diocese of Barra do Piraí and Diocese of Niterói.
Bishops Bishops of Petrópolis (Roman rite): Manuel Pedro da Cunha Cintra † (3 January 1948 - 15 February 1984) Retired José Fernandes Veloso † (15 February 1984 - 15 November 1995) Retired José Carlos de Lima Vaz, S.J. † (15 November 1995 - 12 May 2004) Retired Filippo Santoro (12 May 2004 - 21 November 2011) Appointed, Archbishop of Taranto Gregório (Leozírio) Paixão Neto, O.S.B. (10 October 2012 – 15 December 2023) Appointed, Archbishop of Fortaleza
Coadjutor bishop José Fernandes Veloso (1981-1984)
Auxiliary bishop José Fernandes Veloso (1966-1981), appointed Coadjutor here
Other priests of this diocese who became bishops Paulo Francisco Machado, appointed Auxiliary Bishop of Juiz de Fora, Minas Gerais in 2004 Gilson Andrade da Silva, appointed Auxiliary Bishop of São Salvador da Bahia in 2011
References GCatholic.org Catholic Hierarchy Diocese website (Portuguese)