List of premiers of Ontario

This is a list of the premiers of the province of Ontario, Canada, since Confederation (1867).

#	Name	Took Office	Left Office	Party
1.	John Sandfield Macdonald	1867	1871	Liberal-Conservative Coalition
2.	Edward Blake	1871	1872	Liberal
3.	Sir Oliver Mowat	1872	1896	Liberal
4.	Arthur S. Hardy	1896	1899	Liberal
5.	Sir George William Ross	1899	1905	Liberal
6.	Sir James P. Whitney	1905	1914	Conservative
7.	Sir William Hearst	1914	1919	Conservative
8.	Ernest C. Drury	1919	1923	Farmer-Labour Coalition
9.	George Howard Ferguson	1923	1930	Conservative
10.	George Stewart Henry	1930	1934	Conservative
11.	Mitchell Hepburn	1934	1942	Liberal
12.	Gordon Daniel Conant	1942	1943	Liberal
13.	Harry Nixon	1943	1943	Liberal
14.	George Drew	1943	1948	Progressive Conservative
15.	Thomas Kennedy	1948	1949	Progressive Conservative
16.	Leslie Frost	1949	1961	Progressive Conservative
17.	John Robarts	1961	1971	Progressive Conservative
18.	William (Bill) Davis	1971	1985	Progressive Conservative
19.	Frank Miller	1985	1985	Progressive Conservative
20.	David Peterson	1985	1990	Liberal **
21.	Bob Rae	1990	1995	New Democratic Party (NDP)
22.	Mike Harris	1995	2002	Progressive Conservative
23.	Ernie Eves	2002	2003	Progressive Conservative
24.	Dalton McGuinty	2003	-	Liberal

** Note. The Peterson Government (Liberal) from 1985 to 1987 did not have the most seats in the legislature, but had the formal support of the NDP through a signed accord without an official coalition government being formed.

For more lists of this type, see Lists of incumbents.