The Roman Catholic Diocese of Port Victoria (or Seychelles) (French: Diocèse de Port-Victoria) is the only Latin Catholic diocese in the Seychelles.

It is exempt, i.e. directly dependent on the Holy See, and remains missionary, governed by the Roman Congregation for the Evangelization of Peoples.

Its cathedral episcopal see is the Cathédrale de l’Immaculée Conception (dedicated to the Immaculate Conception) in Victoria, the capital city of the country.

• Established in 1852 as Apostolic Prefecture of Seychelles, on insular territory split off from the Roman Catholic Diocese of Port-Louis (Indian Ocean neighbour Mauritius).
• Promoted on 31 August 1880 as Apostolic Vicariate of Seychelles, hence entitled to a titular bishop.
• Promoted and renamed after its see on 14 July 1892 as Diocese of Port Victoria (also still known as Seychelles).
• It enjoyed a papal visit from Pope John Paul II in December 1986.

• Catholic Church in Seychelles
• List of Catholic dioceses in Indian Ocean Episcopal Conference
• St. Francis of Assisi Church, Baie Lazare

• Diocese of Port Victoria website
• GigaCatholic, with incumbent biography links
• Catholic Hierarchy