# Roman Catholic Archdiocese of Ottawa–Cornwall

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The Archdiocese of Ottawa–Cornwall (Latin: Archidioecesis Ottaviensis–Cornubiensis, French: L'Archidiocèse d'Ottawa-Cornwall) is a Catholic archdiocese in the Province of Ontario. It is the metropolitan diocese of the ecclesiastical province of Ottawa–Cornwall which includes the suffragan dioceses of Hearst–Moosonee, Pembroke, and Timmins. As of 2023, the archdiocese had 129 parishes, 129 diocesan priests, 103 religious priests, and 472,000 Catholics. It also had 379 women religious, 110 religious brothers, and 100 permanent deacons.

## History

The Diocese of Bytown was erected on 25 June 1847. Its name was changed to the Diocese of Ottawa on 14 June 1860. It was elevated to archdiocese status on 8 June 1886. On 6 May 2020, Pope Francis amalgamated the Archdiocese of Ottawa and the Diocese of Alexandria-Cornwall to create the Archdiocese of Ottawa–Cornwall.

## Territory

The Archdiocese includes the City of Ottawa, the United Counties of Prescott and Russell, the eastern portion of the United Counties of Stormont, Dundas and Glengarry, as well as a small portion of Lanark County consisting of only two parishes.

## Leadership
### Bishops and archbishops of Ottawa

* Joseph-Eugène-Bruno Guigues (1847–1874)
* Joseph-Thomas Duhamel (1874–1909)
* Charles-Hughes Gauthier (1910–1922)
* Joseph-Médard Émard (1922–1927)
* Joseph-Guillaume-Laurent Forbes (1928–1940)
* Alexandre Vachon (1940–1953)
* Marie-Joseph Lemieux (1953–1966), appointed titular Archbishop and nuncio
* Joseph-Aurèle Plourde (1967–1989)
* Marcel André J. Gervais (1989–2007)
* Terrence Prendergast, S.J. (2007–2020)

### Archbishops of Ottawa-Cornwall

* Terrence Prendergast, S.J. (May 2020–Dec 2020)
* Marcel Damphousse (2020– )

### Coadjutor bishops

* Alexandre Vachon (1939-1940)
* Marcel André J. Gervais (1989)
* Marcel Damphousse (2020- )

### Auxiliary bishops

* Maxime Tessier (1951-1953), appointed Coadjutor Bishop of Timmins, Ontario
* Paul-Émile Charbonneau (1960-1963), appointed Bishop of Hull, Québec
* Joseph Raymond Windle (1960-1969), appointed Coadjutor Bishop of Pembroke, Ontario
* René Audet (1963-1968), appointed Bishop of Joliette, Québec
* John Michael Behan (1977-1988)
* Gilles Bélisle (1977-1993)
* Brendan Michael O'Brien (1987-1993), appointed Bishop of Pembroke, Ontario
* Paul Marchand, SSM (1993-1999), appointed Bishop of Timmins, Ontario
* Frederick Joseph Colli (1994-1999), appointed Bishop of Thunder Bay, Ontario
* Christian Riesbeck, CC (2014-2019), appointed Bishop of Saint John, New Brunswick
* Yvan Mathieu, S.M. (2022- )

### Other priests of this diocese who became bishops

* John Thomas McNally, appointed Bishop of Calgary, Alberta in 1913
* François-Xavier Brunet, appointed Bishop of Mont-Laurier, Québec in 1913
* Joseph Charbonneau, appointed Bishop of Hearst, Ontario in 1939
* Jean Gratton, appointed Bishop of Mont-Laurier, Québec in 1978
* Jean-Louis Plouffe, appointed Auxiliary Bishop of Sault Sainte Marie, Ontario in 1986
* José Avelino Bettencourt, appointed nuncio and titular Archbishop in 2018

## Statistics

| Year | Population | Population | Population | Priests | Priests | Priests | Priests | Permanent Deacons | Religious | Religious | Parishes |
| Year | Catholics | Total Population | % | Total Priests | Diocesan Priests | Religious priests | Catholics per Priest | Permanent Deacons | Male Religious | Female Religious | Parishes |
| Archdiocese of Ottawa ||||||||||||
| 1950 | 241,000 | 380,000 | 63.4 | 689 | 273 | 416 | 349 | | 1,118 | 1,942 | 132 |
| 1966 | 210,455 | 360,000 | 58.5 | 560 | 204 | 356 | 375 | | 495 | 1,630 | 105 |
| 1970 | 199,985 | 249,530 | 80.1 | 666 | 196 | 470 | 300 | | 680 | 1,634 | 98 |
| 1976 | 261,545 | 516,945 | 50.6 | 443 | 172 | 271 | 590 | 1 | 409 | 1,375 | 100 |
| 1980 | 285,900 | 575,000 | 49.7 | 420 | 166 | 254 | 680 | 9 | 393 | 1,252 | 100 |
| 1990 | 350,000 | 677,000 | 51.7 | 371 | 149 | 222 | 943 | 13 | 326 | 1,047 | 112 |
| 1999 | 402,305 | 805,610 | 49.9 | 341 | 162 | 179 | 1,179 | 40 | 233 | 886 | 113 |
| 2000 | 402,305 | 805,610 | 49.9 | 334 | 167 | 167 | 1,204 | 49 | 215 | 871 | 113 |
| 2001 | 402,305 | 805,610 | 49.9 | 347 | 172 | 175 | 1,159 | 47 | 217 | 859 | 113 |
| 2002 | 402,305 | 812,305 | 49.5 | 264 | 162 | 102 | 1,523 | 50 | 149 | 830 | 113 |
| 2003 | 402,305 | 812,305 | 49.5 | 272 | 170 | 102 | 1,479 | 51 | 142 | 848 | 113 |
| 2004 | 392,635 | 812,305 | 48.3 | 279 | 177 | 102 | 1,407 | 60 | 147 | 848 | 111 |
| 2013 | 428,000 | 892,000 | 48.0 | 282 | 115 | 167 | 1,517 | 86 | 183 | 582 | 107 |
| 2016 | 441,798 | 922,014 | 47.9 | 283 | 116 | 167 | 1,561 | 86 | 180 | 495 | 107 |
| 2019 | 458,200 | 956,200 | 47.9 | 219 | 116 | 103 | 2,092 | 91 | 115 | 445 | 107 |
| Diocese of Alexandria in Ontario ||||||||||||
| 1950 | 42,300 | 63,500 | 66.6 | 50 | 43 | 7 | 846 | | 36 | 212 | 29 |
| 1959 | 48,000 | 69,100 | 69.5 | 61 | 46 | 15 | 786 | | 70 | 240 | 33 |
| 1965 | ? | 77,081 | ? | 75 | 54 | 21 | ? | | 35 | 252 | 32 |
| 1970 | 55,000 | 78,200 | 70.3 | 62 | 51 | 11 | 887 | | 17 | 220 | 30 |
| Diocese of Alexandria-Cornwall ||||||||||||
| 1976 | 51,989 | 78,731 | 66.0 | 56 | 47 | 9 | 928 | | 20 | 156 | 31 |
| 1980 | 45,829 | 81,541 | 56.2 | 46 | 38 | 8 | 996 | 1 | 18 | 131 | 34 |
| 1990 | 56,500 | 88,000 | 64.2 | 48 | 42 | 6 | 1,177 | 10 | 16 | 94 | 34 |
| 1999 | 56,050 | 87,388 | 64.1 | 36 | 36 | | 1,556 | 16 | 4 | 65 | 34 |
| 2000 | 56,050 | 87,388 | 64.1 | 45 | 35 | 10 | 1,245 | 18 | 10 | 66 | 34 |
| 2001 | 56,050 | 87,388 | 64.1 | 43 | 34 | 9 | 1,303 | 18 | 17 | 61 | 34 |
| 2002 | 56,050 | 87,388 | 64.1 | 49 | 39 | 10 | 1,143 | 16 | 14 | 55 | 34 |
| 2003 | 56,050 | 87,388 | 64.1 | 46 | 37 | 9 | 1,218 | 16 | 13 | 55 | 34 |
| 2004 | 56,050 | 87,383 | 64.1 | 45 | 36 | 9 | 1,245 | 16 | 13 | 32 | 32 |
| 2006 | 55,675 | 87,500 | 63.6 | 47 | 40 | 7 | 1,184 | 17 | 11 | 24 | 31 |
| 2012 | 56,600 | 91,000 | 62.2 | 44 | 32 | 12 | 1,286 | 9 | 26 | 22 | 27 |
| 2015 | 57,400 | 100,800 | 56.9 | 37 | 34 | 3 | 1,551 | 18 | 3 | 20 | 28 |
| 2018 | 64,780 | 104,200 | 62.2 | 29 | 27 | 2 | 2,233 | 16 | 2 | 20 | 26 |
| Archdiocese of Ottawa-Cornwall ||||||||||||
| 2021 | 465,000 | 967,260 | 48.1 | 250 | 144 | 106 | 1,860 | 108 | 113 | 425 | 128 |
| 2023 | 472,000 | 981,800 | 48.1 | 232 | 129 | 103 | 2,034 | 100 | 110 | 379 | 129 |