The Roman Catholic Diocese of Umuarama () is a diocese located in the city of Umuarama in the ecclesiastical province of Maringá in Brazil.
History 26 May 1973: Established as Diocese of Umuarama from the Diocese of Campo Mourão
Bishops Bishops of Umuarama (Roman rite) José Maria Maimone, S.A.C. (12 June 1973 - 8 May 2002) Resigned Vicente Costa (9 October 2002 - 30 December 2009) appointed, Bishop of Jundiaí, São Paulo João Mamede Filho, O.F.M. Conv. (24 November 2010 – present)
Coadjutor bishop Frederico Heimler, S.D.B. (1998-2002), did not succeed to see; appointed Bishop of Cruz Alta, Rio Grande do Sul
References GCatholic.org Catholic Hierarchy Diocese website (Portuguese)