The Minister of National Defence is also the designated Lead Minister for Search and Rescue (LMSAR) within the federal government.
| 1. |
George Perry Graham |
Cabinet of King |
January 1, 1923 – April 27, 1923 |
| * |
Edward Mortimer Macdonald (Acting) |
Cabinet of King |
April 28, 1923 – August 16, 1923 |
| 2. |
Edward Mortimer Macdonald |
Cabinet of King |
August 17, 1923 – June 28, 1926 |
| * |
Hugh Guthrie (Acting) |
Cabinet of Meighen |
June 29, 1926 – July 12, 1926 |
| 3. |
Hugh Guthrie |
Cabinet of Meighen |
July 13, 1926 – September 25, 1926 |
|
vacant |
Cabinet of King |
September 25, 1926 – September 30, 1926 |
| * |
James Robb (Acting) |
Cabinet of King |
October 1, 1926 – October 7, 1926 |
| 4. |
James Ralston |
Cabinet of King |
October 8, 1926 – August 7, 1930 |
| 5. |
Donald Matheson Sutherland |
Cabinet of Bennett |
August 7, 1930 – November 16, 1934 |
| 6. |
Grote Stirling |
Cabinet of Bennett |
November 17, 1934 – October 23, 1935 |
| 7. |
Ian Alistair Mackenzie |
Cabinet of King |
October 24, 1935 – September 18, 1939 |
| 8. |
Norman McLeod Rogers |
Cabinet of King |
September 19, 1939 – June 10, 1940 |
| * |
Charles Power (Acting) |
Cabinet of King |
June 11, 1940 – July 4, 1940 |
|
James Ralston (2nd time) |
Cabinet of King |
July 5, 1940 – November 1, 1944 |
| 9. |
Andrew McNaughton |
Cabinet of King |
November 2, 1944 – August 20, 1945 |
| 10. |
Douglas Abbott |
Cabinet of King |
August 21, 1945 – December 9, 1946 |
| 11. |
Brooke Claxton |
Cabinet of King |
December 10, 1946 – November 15, 1948 |
| Cabinet of St–Laurent |
November 15, 1948 – June 30, 1954 |
| 12. |
Ralph Campney |
Cabinet of St–Laurent |
July 1, 1954 – June 20, 1957 |
| 13. |
George Pearkes |
Cabinet of Diefenbaker |
June 21, 1957 – October 10, 1960 |
| 14. |
Douglas Harkness |
Cabinet of Diefenbaker |
October 11, 1960 – February 3, 1963 |
|
vacant |
Cabinet of Diefenbaker |
February 4, 1963 – February 11, 1963 |
| 15. |
Gordon Churchill |
Cabinet of Diefenbaker |
February 12, 1963 – April 21, 1963 |
| 16. |
Paul Hellyer |
Cabinet of Pearson |
April 22, 1963 – September 18, 1967 |
| 17. |
Léo Cadieux |
Cabinet of Pearson |
September 1967 – April 19, 1968 |
| Cabinet of Trudeau |
April 20, 1968 – September 16, 1970 |
| * |
Bud Drury (Acting) |
Cabinet of Trudeau |
September 17, 1970 – September 23, 1970 |
| 18. |
Donald Macdonald |
Cabinet of Trudeau |
September 24, 1970 – January 27, 1972 |
| 19. |
Edgar Benson |
Cabinet of Trudeau |
January 28, 1972 – August 31, 1972 |
| * |
Jean-Eudes Dubé (Acting) |
Cabinet of Trudeau |
September 1, 1972 – September 6, 1972 |
| * |
Bud Drury (Acting) (2nd time) |
Cabinet of Trudeau |
September 7, 1972 – November 26, 1972 |
| 20. |
James Richardson |
Cabinet of Trudeau |
November 27, 1972 – October 12, 1976 |
| * |
Barnett Danson (Acting) |
Cabinet of Trudeau |
October 13, 1976 – November 2, 1976 |
| 21. |
Barnett Danson |
Cabinet of Trudeau |
November 3, 1976 – June 3, 1979 |
| 22. |
Allan McKinnon |
Cabinet of Clark |
June 4, 1979 – March 2, 1980 |
| 23. |
Gilles Lamontagne |
Cabinet of Trudeau |
March 3, 1980 – August 11, 1983 |
| 24. |
Jean–Jacques Blais |
Cabinet of Trudeau |
August 12, 1983 – June 29, 1984 |
| Cabinet of Turner |
June 30, 1984 – September 16, 1984 |
| 25. |
Robert Coates |
Cabinet of Mulroney |
September 17, 1984 – February 11, 1985 |
| * |
Erik Nielsen (Acting) |
Cabinet of Mulroney |
February 12, 1985 – February 25, 1985 |
| 26. |
Erik Nielsen |
Cabinet of Mulroney |
February 26, 1985 – June 29, 1986 |
| 27. |
Perrin Beatty |
Cabinet of Mulroney |
June 30, 1986 – January 29, 1989 |
| 28. |
Bill McKnight |
Cabinet of Mulroney |
January 30, 1989 – April 20, 1991 |
| 29. |
Marcel Masse |
Cabinet of Mulroney |
April 21, 1991 – January 3, 1993 |
| 30. |
Kim Campbell |
Cabinet of Mulroney |
January 4, 1993 – June 24, 1993 |
| 31. |
Tom Siddon |
Cabinet of Campbell |
June 25, 1993 – November 3, 1993 |
| 32. |
David Collenette |
Cabinet of Chrétien |
November 4, 1993 – October 4, 1996 |
| 33. |
Doug Young |
Cabinet of Chrétien |
October 5, 1996 – June 10, 1997 |
| 34. |
Art Eggleton |
Cabinet of Chrétien |
June 11, 1997 – June 25, 2002 |
| 35. |
John McCallum |
Cabinet of Chrétien |
June 26, 2002 – December 11, 2003 |
| 36. |
David Pratt |
Cabinet of Martin |
December 12, 2003 – July 19, 2004 |
| 37. |
Bill Graham |
Cabinet of Martin |
July 20, 2004 – February 5, 2006 |
| 38. |
Gordon O'Connor |
Cabinet of Harper |
February 6, 2006 – August 14, 2007 |
| 39. |
Peter MacKay |
Cabinet of Harper |
August 14, 2007 – |