The Roman Catholic Diocese of Thiès (Latin: Thiesin(us), French: Diocèse catholique romain de Thiès) is a diocese located in the city of Thiès in the ecclesiastical province of Dakar in Senegal.

On Friday, January 18, 2013, Pope Benedict XVI named the Rev. André Gueye as Bishop-designate of the Roman Catholic Diocese of Thiès, to be ordained and installed at a date in the near future (which would be May 25). Up until then, he had been serving as a member of the Thiès diocesan clergy, and as a professor of philosophy at the Major Seminary of Saint Jean Marie Vianney in Bris, Senegal (in the Roman Catholic Diocese of Ziguinchor in Ziguinchor, Senegal).

• February 6, 1969: Established as Diocese of Thiès from the Metropolitan Archdiocese of Dakar

• The cathedral is Cathédrale Sainte Anne in Thiès.

• Bishops of Thiès (Roman rite)
  • Bishop François-Xavier Dione (1969.02.06 – 1985.02.04)
  • Bishop Jacques Sarr (1986.10.17 - 2011.01.18)
  • Bishop André Gueye (2014.01.18 -)

• Roman Catholicism in Senegal

• GCatholic.org
• Catholic Hierarchy

14°48′03″N 16°55′49″W / 14.8007°N 16.9304°W / 14.8007; -16.9304