The Diocese of Victoria (Latin: Dioecesis Victoriensis in Insula Vancouver) is a Latin Church ecclesiastical territory or diocese of the Catholic Church in the Canadian province of British Columbia. Its episcopal see is in Victoria. The diocese encompasses all of Vancouver Island and several nearby British Columbia islands. A suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Vancouver, the diocese's cathedral is St. Andrew's Cathedral and its present diocesan bishop is Gary Gordon.

As of 2004, the diocese had 94,465 Catholics, 22 diocesan Priests, 15 religious Priests, 1 Deacon. The diocese is also helped by 19 Brothers, and 91 Sisters servicing 30 parishes.

The diocese was created on 24 July 1846 as the Diocese of Vancouver Island, one of three dioceses in the Pacific Northwest created out of the Vicariate Apostolic of the Oregon Territory. It was elevated to an archdiocese on 19 June 1903 and renamed Archdiocese of Victoria in 1904. It was then lowered to a diocese in 1908, when the metropolitan see was moved to Vancouver.

The territory included Vancouver Island, the Gulf Islands, New Caledonia (mainland British Columbia), the Queen Charlotte Islands and Alaska. Modeste Demers became the new diocese's first bishop.

Territorial losses

Year	territory lost to form:
1863	Vicariate Apostolic of British Columbia
1894	Diocese of New Westminster Prefecture Apostolic of Alaska

On June 19, 1903, the diocese became an Archdiocese of Victoria. It was returned to the status of a diocese on October 1, 1908, and became a suffragan diocese to the Roman Catholic Archdiocese of Vancouver.

The following are the lists of Bishops and their years of service:

• Modeste Demers (1846–1871)
• Charles-Jean Seghers (1873–1878), appointed Coadjutor Archbishop of Oregon City, Oregon, USA; returned here in 1884
• Jean-Baptiste Brondel (1879–1883)
• Charles-Jean Seghers (1884–1886); personal title of Archbishop
• Jean-Nicolas Lemmens (1888–1897)
• Alexander Christie (1898–1899), appointed Archbishop of Oregon City, Oregon, USA
• Bertram Orth (1900–1908)
• Alexander MacDonald (1908–1923)
• Thomas O'Donnell (1923–1929), appointed Coadjutor Archbishop of Halifax, Nova Scotia
• Gerald C. Murray, C.SS.R. (1930–1934), appointed Bishop of Saskatoon, Saskatchewan
• John Hugh MacDonald (1934–1936), appointed Coadjutor Archbishop of Edmonton, Alberta
• John Christopher Cody (1936–1946), appointed Coadjutor Bishop of London, Ontario
• James Michael Hill (1946–1962)
• Remi Joseph De Roo (1962–1999)
• Raymond Roussin, S.M. (1999–2004), appointed Archbishop of Vancouver, British Columbia
• Richard Gagnon (2004–2014), appointed Archbishop of Winnipeg
• Gary Gordon (2014–present)

• John James Jonckau (1883); did not take effect
• Raymond Olir Roussin, S. M. (1998-1999)

• Louis Aloysius Lootens (1876-1898)

• House of Bread Monastery, a Benedictine monastery in Nanaimo

School	City	Est.	Website	Enrolment
St. Andrew's Regional High School	Victoria		http://www.standrewshigh.ca/	~475 (co-ed)

• St. Ann's Academy (Victoria, British Columbia), was open 1858 and closed in 1974.
• Smith Memorial High School, of Port Alberni, was opened 1951 and closed in 1976.

School	City	Est.	Website
St. Joseph’s	Victoria		http://www.stjosephschool.ca/
St. Patrick's	Victoria		http://www.stpatrickselem.ca/
Queen of Angels	Duncan		http://www.queenofangels.ca/
St. John Paul II	Port Alberni	1951	http://www.jp2nd.ca/

• St. Ann's Academy for Boys, of Duncan, was erected in 1864 and closed in 1969.
• St. Mary's School, of Ladysmith, was established 1909 and closed in 1913.

• St. Joseph's School for Nursing, of Victoria, was erected in 1900 and closed in 1981.
• St. John Fisher / Thomas More College 1953 and closed in 1993.

Religious institutes of women

• Benedictine Sisters
• Franciscan Poor Clares
• Missionary Oblates of Mary Immaculate
• Sisters of St. Ann

The Diocese managed two residential schools in British Columbia. Upon the discovery of the remains of 215 children at Kamloops Indian Residential School, the diocese released a statement of apology and commitment.

• Kuper Island Indian Residential School
• The Christie Roman Catholic school

Health Care

• Lourdes Hospital, of Campbell River, was erected in 1926 and closed in 1957.
• St. Joseph's Hospital, of Victoria, was erected in 1876 and closed in 1972.

• The diocese produces the Diocesan Messenger which is a Catholic newspaper for its community.

• Sisters of St. Ann's scrapbook
• St. Ann's establishments
• "Diocese of Victoria". Catholic-Hierarchy. Retrieved 2007-03-15.

• Official website

48°25′00″N 123°21′00″W / 48.4167°N 123.3500°W / 48.4167; -123.3500