The Roman Catholic Diocese of Roseau (Latin: Dioecesis Rosensis) is a diocese of the Latin Church of the Roman Catholic Church in the Caribbean. The diocese encompasses the entirety of the country of Dominica. The diocese is a suffragan of the Archdiocese of Castries, and a member of the Antilles Episcopal Conference.

The diocese of Roseau was erected in 1850. The territory was previously part of the former Vicariate Apostolic of Trinidad.

• Michael Monaghan (1851–1855)
• Désiré-Michel Vesque (1856–1858)
• René-Marie-Charles Poirier, C.I.M. (1858–1878)
• Michael Naughten (1879–1900)
• Philip Schelfhaut, C.Ss.R. (1902–1921)
• Giacomo Moris, C.Ss.R. (1922–1957)
• Arnold Boghaert, C.Ss.R. (1957–1993)
• Edward Joseph Gilbert, C.Ss.R. (1994–2001), appointed Archbishop of Port of Spain, Trinidad and Tobago
• Gabriel Malzaire (2002–2022)
• Kendrick Forbes (Elect 2024)

• Antoon Demets, C.SS.R. (1946–1954), did not succeed to see
• Arnold Boghaert, C.SS.R. (1956–1957)

• "Diocese of Roseau". Catholic-Hierarchy. Retrieved 2007-02-27.

15°17′50″N 61°23′07″W / 15.2973°N 61.3854°W / 15.2973; -61.3854