| Randy Ambrosie (Winnipeg, MB) | Jul 5, 2017 – Present | 5 years, 10 months and counting |
| Jeffrey L. Orridge (New York, NY) | Apr 29, 2015 – Jun 15, 2017 | 2 years, 1 month |
| Jim Lawson 1 (Toronto) | Jan 9, 2015 – Apr 28, 2015 | 3 months, 2 weeks |
| Mark Cohon (Toronto) | Apr 17, 2007 – Jan 9, 2015 | 7 years, 8 months |
| Tom E. Wright (Toronto) | Nov 23, 2002 – Nov 20, 2006 | 3 years, 11 months |
| David Braley 1 (Burlington) | Mar 20, 2002 – Nov 22, 2002 | 8 months |
| Michael R. Lysko (Toronto) | Nov 1, 2000 – Mar 19, 2002 | 1 year, 4 months |
| John H. Tory 1 (Toronto) | Feb 2, 1997 – Oct 31, 2000 | 3 years, 8 months |
| Larry W. Smith (Montreal) | Feb 27, 1992 – Feb 1, 1997 | 4 years, 11 months |
| J. Donald Crump, C.A. (Toronto) | Jan 5, 1990 – Dec 31, 1991 | 1 year, 11 months |
| Bill Baker 2 (Regina) | Jan 1, 1989 – Dec 31, 1989 | 11 months, 4 weeks |
| Doug Mitchell, Q.C. (Calgary) | Jun 1, 1984 – Dec 31, 1988 | 4 years, 6 months |
| Jake G. Gaudaur, O.C. (Hamilton) | Apr 2, 1968 – May 31, 1984 | 16 years, 1 month |
| Allan McEachern 1 (Vancouver) | Feb 24, 1967 – Apr 1, 1968 | 1 year, 1 month |
| Ted Workman (Montreal) | Feb 23, 1967 – Feb 24, 1967 | 1 day |
| Keith Davey (Toronto) | Jan 1, 1967 – Feb 22, 1967 | 1 month, 3 weeks |
| G. Sydney Halter, Q.C. (Winnipeg) | Jan 19, 1958 – Dec 31, 1966 | 8 years, 11 months |
1 – Acting
2 – In 1989, the commissioner role was split into two positions. Bill Baker held the title of President/Chief Operating Officer. Roy McMurtry, Q.C. held the position of Chairman/Chief Executive Officer.
Note: During the period between Bill Baker's resignation and Donald Crump's appointment, Roy McMutry continued in the role of Chairman but did not hold the role of acting Commissioner. Similarily, between Donald Crump's resignation and Larry Smith's appointment, Phil Kershaw held the role of Chairman but was not acting Commissioner. During these periods the Commissioner position was vacant.