 
 
| Bishop(s)
 Suffragan Dioceses
 | General Information
 | 
| Date | Event | From | To | 
|---|---|---|---|
| Diocese of Toronto | |||
| 17 December 1841 | Erected | Diocese of Kingston | Diocese of Toronto (erected) | 
| 12 July 1844 | Metropolitan Changed | Diocese of Toronto (from Immediately Subject) | |
| 25 June 1847 | Territory Lost | Diocese of Kingston Diocese of Montréal Diocese of North-West (Nord-Ouest) Diocese of Toronto | Diocese of Bytown (erected) | 
| 21 February 1855 | Territory Lost | Diocese of Toronto (Counties of Middlesex, Elgin, Kent, Lambton, Huron, Perth, Oxford, and Norfolk.) | Diocese of London (erected) | 
| 29 February 1856 | Territory Lost | Diocese of Toronto (Counties of Brant, Bruce, Grey, Halton, Haldimand, Waterloo, Wellington, and Wentworth and parts of Dufferin County) | Diocese of Hamilton (erected) | 
| Archdiocese of Toronto | |||
| 18 March 1870 | Elevated | Diocese of Toronto | Archdiocese of Toronto | 
| 22 November 1958 | Territory Lost | Diocese of Hamilton (Halimand) Archdiocese of Toronto (Lincoln and Weiland) | Diocese of Saint Catharines (erected) | 
| 15 September 2020 | Territory Added | Diocese of Hamilton (Parts near Milton) | Archdiocese of Toronto | 
| Year | Catholics | Total Population | Percent Catholic | Diocesan Priests | Religious Priests | Total Priests | Catholics Per Priest | Permanent Deacons | Male Religious | Female Religious | Parishes | Source | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Archdiocese of Toronto | ||||||||||||
| 1950 | 196,826 | 1,302,104 | 15.1% | 236 | 248 | 484 | 406 | 552 | 1,141 | 120 | ap1951 | |
| 1966 | 595,000 | 2,870,000 | 20.7% | 293 | 386 | 679 | 876 | 842 | 1,360 | 148 | ap1967 | |
| 1970 | 645,000 | 3,300,000 | 19.5% | 296 | 400 | 696 | 926 | 589 | 1,030 | 168 | ap1971 | |
| 1976 | 900,000 | 3,300,000 | 27.3% | 297 | 465 | 762 | 1,181 | 44 | 821 | 1,060 | 174 | ap1977 | 
| 1980 | 1,007,000 | 3,550,000 | 28.4% | 299 | 480 | 779 | 1,292 | 77 | 817 | 1,010 | 182 | ap1981 | 
| 1990 | 1,082,944 | 3,800,000 | 28.5% | 342 | 585 | 927 | 1,168 | 102 | 756 | 996 | 211 | ap1991 | 
| 1999 | 1,798,000 | 5,215,000 | 34.5% | 382 | 506 | 888 | 2,024 | 114 | 693 | 705 | 222 | ap2000 | 
| 2000 | 1,832,000 | 5,315,000 | 34.5% | 387 | 494 | 881 | 2,079 | 142 | 619 | 733 | 222 | ap2001 | 
| 2001 | 1,847,000 | 5,360,000 | 34.5% | 385 | 501 | 886 | 2,084 | 147 | 613 | 738 | 222 | ap2002 | 
| 2002 | 1,420,395 | 4,147,680 | 34.2% | 377 | 485 | 862 | 1,647 | 129 | 606 | 734 | 222 | ap2003 | 
| 2003 | 1,693,690 | 5,043,085 | 33.6% | 359 | 445 | 804 | 2,106 | 105 | 551 | 667 | 223 | ap2004 | 
| 2004 | 1,363,657 | 5,043,085 | 27.0% | 363 | 448 | 811 | 1,681 | 96 | 510 | 668 | 223 | ap2005 | 
| 2010 | 1,931,000 | 5,679,000 | 34.0% | 376 | 449 | 825 | 2,340 | 112 | 572 | 571 | 217 | ap2011 | 
| 2014 | 2,086,000 | 6,016,000 | 34.7% | 389 | 452 | 841 | 2,480 | 128 | 548 | 552 | 226 | ap2015 | 
| 2017 | 2,091,237 | 6,602,490 | 31.7% | 376 | 415 | 791 | 2,643 | 129 | 508 | 490 | 225 | ap2018 | 
| 2020 | 2,061,600 | 6,530,000 | 31.6% | 368 | 412 | 780 | 2,643 | 157 | 508 | 471 | 226 | ap2021 | 
| 2022 | 2,111,364 | 6,687,634 | 31.6% | 362 | 384 | 746 | 2,830 | 147 | 489 | 439 | 226 | ap2023 | 
| 2023 | 2,121,900 | 6,721,000 | 31.6% | 365 | 376 | 741 | 2,863 | 150 | 472 | 430 | 225 | ap2024 | 
Note: Any changes in boundaries over time are not indicated in the above table.
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