The Roman Catholic Diocese of Brejo (Latin: Dioecesis Breiensis) is a diocese located in the city of Brejo in the ecclesiastical province of São Luís do Maranhão in Brazil.

• 14 September 1971: Established as Diocese of Brejo from Metropolitan Archdiocese of São Luís do Maranhão

• Bishops of Brejo (Latin Rite)
  • Afonso de Oliveira Lima, S.D.S. † (29 Nov 1971 - 25 Sep 1991) Retired
  • Valter Carrijo, S.D.S. (25 Sep 1991 Succeeded - 5 May 2010) Retired
  • José Valdeci Santos Mendes (5 May 2010 – present)

• Valter Carrijo, S.D.S. (1989-1991)

• GCatholic.org
• Catholic Hierarchy

3°41′00″S 42°45′05″W / 3.6834°S 42.7513°W / -3.6834; -42.7513