The Roman Catholic Diocese of Moundou (Latin: Munduen(sis)) is a diocese in Moundou in the ecclesiastical province of N'Djamena in Chad.

• May 17, 1951: Established as Apostolic Prefecture of Moundou from the Apostolic Prefecture of Fort-Lamy and Apostolic Prefecture of Garoua in Cameroon
• February 19, 1959: Promoted as Diocese of Moundou

The Cathedral is the Cathédrale du Sacré-Cœur in Moundou.

• Bishops of Moundou (Roman rite), below
  • Bishop Joachim Kouraleyo Tarounga (since June 3, 2004)
  • Bishop Matthias N’Gartéri Mayadi (June 11, 1990 – July 31, 2003), appointed Archbishop of N’Djaména
  • Bishop Gabriel (Régis) Balet, OFMCap (March 9, 1985 – September 18, 1989)
  • Bishop Joseph Marie Régis Belzile, OFMCap (December 19, 1974 – March 9, 1985)
  • Bishop Samuel Gaumain, OFMCap (December 19, 1959 – December 19, 1974)
• Prefect Apostolic of Moundou (Roman rite), below
  • Fr. Clément Sirgue, OFMCap (1952 – 1959)

Roman Catholicism in Chad

• GCatholic.org

8°33′45″N 16°04′12″E / 8.5624°N 16.0699°E / 8.5624; 16.0699