The Roman Catholic Diocese of Ji-Paraná () is a diocese located in the city of Ji-Paraná in the ecclesiastical province of Porto Velho in Brazil.
History 3 January 1978: Established as Territorial Prelature of Vila Rondônia from the Territorial Prelature of Guajará-Mirim and Territorial Prelature of Porto Velho 19 February 1983: Promoted as Diocese of Ji-Paraná 23 December 1997: Lost territory, along with Diocese of Diamantino, to establish Diocese of Juína
Leadership, in the chronological order Prelate of Vila Rondônia (Roman Rite) Bishop José Martins da Silva, S.D.N. (1978.01.03 – 1982.10.04), appointed Archbishop of Porto Velho, Rondonia Bishops of Ji-Paraná (Roman rite) Bishop Antônio Possamai, S.D.B. (1983.03.04 – 2007.04.11) Bishop Bruno Pedron, S.D.B. (2007.04.11 – 2019.06.05) Bishop Norbert Hans Christoph Foerster, S.V.D. (2020.12.02 – present)
References GCatholic.org Catholic Hierarchy Diocese website (Portuguese)