The Ontario Government House Leader is the provincial cabinet minister responsible for planning and managing the government's legislative program in the Legislative Assembly of Ontario. The position is not legally entitled to cabinet standing on its own, so all Government House Leaders must simultaneously hold another portfolio (or be specifically designated as a minister without portfolio).
House Leaders at the federal level are often granted sinecure assignments to give them cabinet standing while allowing them to focus exclusively on house business. This has not been the case at the provincial level. In recent years, John Baird and Dwight Duncan have served as Government House Leaders while simultaneously holding the high-profile Minister of Energy position.
The current Government House Leader is John Milloy (as of October 20, 2011).
| Name | Tenure | Concurrent Ministry |
|---|---|---|
| John Milloy | October 20, 2011 — Present | Minister of Community and Social Services |
| Monique Smith | February 4, 2009 — October 6, 2011 | Minister of Tourism |
| Michael Bryant | October 30, 2007 — February 4, 2009 | Minister of Economic Development Minister of Aboriginal Affairs |
| Jim Bradley | October 11, 2005 — September 10, 2007 | Minister of Tourism Minister Responsible for Seniors |
| Dwight Duncan | October 23, 2003 — October 11, 2005 | Minister of Energy |
| John Baird | June 17, 2003 — September 2, 2003 | Minister of Energy Minister Responsible for Francophone Affairs |
| Chris Stockwell | April 15, 2002 — June 17, 2003 | Minister of the Environment |
| Janet Ecker | February 8, 2001 — April 14, 2002 | Minister of Education |
| Norman Sterling | 37th Parliament June 17, 1999 — February 8, 2001 36th Parliament October 10, 1997 — May 5, 1999 |
37th Parliament Minister of Correctional Services Minister of Intergovernmental Affairs 36th Parliament Minister of the Environment |
| David Johnson | August 16, 1996 — October 10, 1997 | Minister of Health Interim |
| Ernie Eves | June 26, 1995 — August 16, 1996 | Minister of Finance Deputy Premier |
| Dave Cooke | July 31, 1991 — April 28, 1995 | Minister of Municipal Affairs (1991-1993) Minister of Education (1993-1995) |
| Shelley Martel | October 1, 1990 — July 31, 1991 | Minister of Northern Development |
| Christopher Ward | August 2, 1989 — August 2, 1990 | Minister of Government Services |
| Sean Conway | September 29, 1987 — August 2, 1989 | Minister of Mines |
| Robert Nixon | June 26, 1985 — July 31, 1987 | Minister of Revenue Minister of Economics Treasurer Successor Ministries to the Minister of Finance |
| Larry Grossman | May 17, 1985 — June 26, 1985 | Minister of Education Minister of Colleges and Universities Provincial Secretary for Social Development |
| Robert Welch | February 20, 1985 — May 1, 1985 | Deputy Premier Attorney General |
| Thomas Wells | December 23, 1983 — February 8, 1985 | Minister of Intergovernmental Affairs |