The Roman Catholic Diocese of Foz do Iguaçu (Latin: Dioecesis Iguassuensis) is a diocese located in the city of Foz do Iguaçu in the ecclesiastical province of Cascavel in Brazil.

• May 10, 1926: Established as Territorial Prelature of Foz do Iguaçu from the Diocese of Curitiba
• 1959: Suppressed (to Diocese of Campo Mourão and Diocese of Toledo)
• May 5, 1978: Restored as Diocese of Foz do Iguaçu from the Diocese of Toledo

• Bishops of Foz do Iguaçu (Roman rite)
  • Bishop Sérgio de Deus Borges (2019.09.07 – ...)
  • Bishop Dirceu Vegini (2010.10.20 – 2018.09.29)
  • Bishop Laurindo Guizzardi, C.S. (1982.02.12 – 2010.10.20)
  • Bishop Olívio Aurélio Fazza, S.V.D. (1978.05.05 – 2001.11.28)
• Prelates of Foz do Iguaçu (Roman Rite)
  • Bishop Manoel Könner, S.V.D. (1947.12.13 – 1959.06.20)
  • Fr. Manoel Könner, S.V.D. (later Bishop) (Apostolic Administrator 1940.02.17 – 1947.12.13)

• GCatholic.org
• Catholic Hierarchy
• Diocese website (Portuguese)

25°32′49″S 54°35′13″W / 25.5469°S 54.5869°W / -25.5469; -54.5869