The Honourable David C. Onley, O.Ont.
5 September 2007 – present

The Honourable James K. Bartleman, O.Ont.
7 March 2002 – 5 September 2007

The Honourable Hilary M. Weston, O.Ont.
24 January 1997 – 7 March 2002

Colonel The Honourable Henry N.R. Jackman, CM
11 December 1991 – 24 January 1997

Colonel The Honourable Lincoln M. Alexander, PC, QC
20 September 1985 – 11 December 1991

Captain (N) The Honourable John Black Aird, OC, QC
15 September 1980 – 20 September 1985

The Honourable Pauline M. McGibbon, OC
10 April 1974 – 15 September 1980

The Honourable William Ross Macdonald, PC, CD, QC
4 July 1968 – 10 April 1974

The Honourable William Earl Rowe, PC
1 May 1963 – 4 July 1968

The Honourable John Keiller MacKay, PC, DSO, VD, QC
30 December 1957 – 1 May 1963

The Honourable Louis Orville Breithaupt
18 February 1952 – 30 December 1957

The Honourable Ray Lawson, OBE
26 December 1946 – 18 February 1952

The Honourable Albert Edward Matthews
23 November 1937 – 26 December 1946

Colonel The Honourable Herbert Alexander Bruce
1 November 1932 – 23 November 1937

The Right Honourable Sir William Mulock, PC, KCMG
Administrator of the Government
25 October 1931 – 1 November 1932

The Honourable William Donald Ross
12 January 1927 – 25 October 1931

Colonel The Honourable Henry Cockshutt
10 September 1921 – 12 January 1927

The Honourable Lionel Herbert Clarke
1 December 1919 – 29 August 1921

The Honourable Sir John Strathearn Hendrie, KCMG, CVO
2 October 1914 – 20 November 1919

The Honourable Sir John Morison Gibson, KCMG, KC
22 September 1908 – 26 September 1914

The Honourable Sir William Mortimer Clark, KCMG, KC
21 April 1903 – 21 September 1908

The Honourable Sir Oliver Mowat, PC, GCMG, QC
18 November 1897 – 19 April 1903

Colonel Sir Casmir Stanislaus Gzowski, KCMG, AdeC
Administrator of the Government
7 November 1896 – 18 November 1897

The Honourable Sir George Airey Kirkpatrick, PC, KCMG, QC
30 May 1892 – 7 November 1896

The Honourable Sir Alexander Campbell, PC, KCMG, QC
1 June 1887 – 24 May 1892

The Honourable John Beverley Robinson
1 July 1880 – 31 May 1887

The Honourable Donald Alexander Macdonald, PC
18 May 1875 – 30 June 1880

The Honourable John Willoughby Crawford, QC
12 November 1873 – 13 May 1875

The Honourable William Pearce Howland, PC, CB
15 July 1868 – 11 November 1873

Major-General The Honourable Henry William Stisted, CB
1 July 1867 – 14 July 1868