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List of premiers of Ontario by time in office

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This is a list of premiers of Ontario in order of time served in office as premier of Ontario as of December 29, 2024. The preceding premier always stays in office during an election campaign, and that time is included in the total. See also List of Ontario political parties by time in office.

List

Rank Premier Incumbency Dates in office Mandates Party
1 Oliver Mowat 23 years, 270 days 1872–1896 6 █ Liberal
2 Bill Davis 13 years, 344 days 1971–1985 4 █ Progressive Conservative
3 Leslie Frost 12 years, 188 days 1949–1961 3 █ Progressive Conservative
4 James Whitney 9 years, 229 days 1905–1914 4 █ Conservative
5 John Robarts 9 years, 113 days 1961–1971 2 █ Progressive Conservative
6 Dalton McGuinty 9 years, 111 days 2003–2013 3 █ Liberal
7 Mitchell Hepburn 8 years, 103 days 1934–1942 2 █ Liberal
8 Howard Ferguson 7 years, 152 days 1923–1930 3 █ Conservative
9 Mike Harris 6 years, 292 days 1995–2002 2 █ Progressive Conservative
10 Doug Ford (incumbent) 6 years, 183 days 2018–present 2 █ Progressive Conservative
11 Kathleen Wynne 5 years, 138 days 2013–2018 1 █ Liberal
12 George William Ross 5 years, 110 days 1899–1905 1 █ Liberal
13 David Peterson 5 years, 97 days 1985–1990 1 █ Liberal
14 George A. Drew 5 years, 63 days 1943–1948 3 █ Progressive Conservative
15 William Howard Hearst 5 years, 43 days 1914–1919 0 █ Conservative
16 Bob Rae 4 years, 268 days 1990–1995 1 █ New Democratic
17 John Sandfield Macdonald 4 years, 157 days 1867–1871 1 █ Conservative
18 Ernest Charles Drury 3 years, 244 days 1919–1923 1 █ United Farmers
19 George Stewart Henry 3 years, 207 days 1930–1934 0 █ Conservative
20 Arthur Sturgis Hardy 3 years, 92 days 1896–1899 1 █ Liberal
21 Ernie Eves 1 year, 190 days 2002–2003 0 █ Progressive Conservative
22 Edward Blake 310 days 1871–1872 1 █ Liberal
23 Gordon Daniel Conant 209 days 1942–1943 0 █ Liberal
24 Thomas Laird Kennedy 197 days 1948-1949 0 █ Progressive Conservative
25 Frank Miller 138 days 1985 1 █ Progressive Conservative
26 Harry Nixon 91 days 1943 0 █ Liberal
^* Frank Miller's Progressive Conservative Party won a plurality of seats in the 1985 Ontario general election, but the resulting 33rd Parliament of Ontario passed a motion of no confidence against him less than two months into his mandate, replacing his government with David Peterson's Liberal Party. This table counts the 1985 election as a mandate for Miller.

References

  1. "Oliver Mowat, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  2. "William Grenville Davis, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  3. "Leslie Miscampbell Frost, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  4. "James Pliny Whitney, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  5. died in office
  6. "John Parmenter Robarts, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  7. "Dalton McGuinty, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  8. "Mitchell Frederick Hepburn, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  9. "George Howard Ferguson, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  10. "Michael Harris, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  11. "Kathleen O. Wynne, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  12. "George William Ross, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  13. "David Robert Peterson, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  14. "George Alexander Drew, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  15. "William Howard Hearst, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  16. "Bob Keith Rae, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  17. "John Sandfield Macdonald, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  18. "Ernest Charles Drury, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  19. "George Stewart Henry, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  20. "Arthur Sturgis Hardy, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  21. "Ernie Eves, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  22. "Edward Blake, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  23. "Gordon Daniel Conant, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  24. "Thomas Laird Kennedy, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  25. "Frank Stuart Miller, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
  26. "Harry Corwin Nixon, MPP". Legislative Assembly website. Legislative Assembly on Ontario. Retrieved April 1, 2013.
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