The Roman Catholic Diocese of Ruy Barbosa (Latin: Dioecesis Ruibarbosensis) is a diocese located in the city of Ruy Barbosa, Bahia in the ecclesiastical province of Feira de Santana in Brazil.

• November 14, 1959: Established as Diocese of Ruy Barbosa from the Diocese of Barra, Diocese of Bonfim and Metropolitan Archdiocese of São Salvador da Bahia.

• Bishops of Ruy Barbosa (Roman rite)
  • Bishop Epaminondas José de Araújo (1959.12.14 – 1966.10.27), appointed Bishop of Anápolis, Goias
  • Bishop José Adelino Dantas (1967.02.20 – 1975.10.04)
  • Bishop Mathias William Schmidt, O.S.B. (1976.05.14 – 1992.05.24)
  • Bishop André de Witte (1994.06.08 – 2020.04.15)
  • Bishop Estevam dos Santos Silva Filho (2020.04.15 – ...)

• GCatholic.org
• Catholic Hierarchy
• Diocese website (Portuguese) Archived 2008-04-11 at the Wayback Machine