Dufferin—Peel—Wellington—Grey (provincial electoral district)

Dufferin—Peel—Wellington—Grey is a former provincial electoral district in southwestern Ontario, Canada that elected one Member of the Legislative Assembly of Ontario. It was created in 1999 from Wellington, Grey and Dufferin—Peel. It was abolished in 2007 into Dufferin—Caledon, Bruce—Grey—Owen Sound, Perth—Wellington and Wellington—Halton Hills ridings.

The riding included all of Dufferin County plus the municipalities of Caledon, Erin, West Luther Township, Arthur, Southgate and Mount Forest.

The provincial riding of Dufferin—Peel—Wellington—Grey was created when the Harris government passed a bill reducing the number of ridings electing Members of Provincial Parliament (MPPs) in the Legislative Assembly so that they were the same as the number of federal Members of Parliament from Ontario.

David Tilson of the Progressive Conservative Party of Ontario was elected from the riding in the 1999 provincial election. In April 2002, Tilson resigned his seat in order to give the newly elected party leader and Premier of Ontario, Ernie Eves, an opportunity to enter the provincial legislature through a by-election. Eves won the by-election and retained his seat in the subsequent 2003 election although his government was defeated.

Eves subsequently resigned as party leader and, on January 31, 2005, he resigned his seat in order to give his successor, John Tory the opportunity to enter the legislature through a by-election.

The by-election was held on March 17, 2005. Tory was the Progressive Conservative candidate against Bob Duncanson for the Ontario Liberal Party, Lynda McDougall for the Ontario New Democratic Party, Frank de Jong who was leader of the Green Party of Ontario as well as the party's candidate, and independent Representative candidate William Cook. Tory won, with 56.3% of the vote.

Members of Provincial Parliament

1. David Tilson, Progressive Conservative (1999–2002)
2. Ernie Eves, Progressive Conservative (2002–2005)
3. John Tory, Progressive Conservative (2005–2007)

Election results

2005 by-election

Party		Candidate	Votes	%	±%
	Progressive Conservative	John Tory	15,610	56.3	-
	Liberal	Bob Duncanson	4,625	16.7	-
	New Democratic	Lynda McDougall	3,881	14.0
	Green	Frank de Jong	2,767	10.0
	Family Coalition	Paul Micelli	479	1.7	-
	Independent	William Cook	163	0.6	-
	Libertarian	Philip Bender	135	0.5	-
	Independent	John Turmel	85	0.3	-

Ontario general election, 2003

Party		Candidate	Votes	%	±%
	Progressive Conservative	Ernie Eves	29,222	56.64	-8.12
	Liberal	Dan Yake	14,859	28.8	-0.03
	Green	Frank De Jong	3,161	6.13	3.68
	New Democratic	Mitchel Healey	3,148	6.1	+2.13
	Family Coalition	Dave Davies	1,202	2.33

2002 by-election

Party		Candidate	Votes	%	±%
	Progressive Conservative	Ernie Eves	15,288	46.59
	Liberal	Josh Matlow	11,728	35.74
	New Democratic	Doug Wilcox	2,633	8.02
	Green	Richard Procter	2,017	6.15
	Family Coalition	Dave Davies	1,025	3.12
	Independent	John Turmel	120	0.37

Ontario general election, 1999
Party		Candidate	Votes	%
	Progressive Conservative	David Tilson	30,532	64.76
	Liberal	Steve White	13,591	28.83
	New Democratic	Noel Duignan	1,871	3.97
	Green	Richard Procter	1,156	2.45
Total valid votes/			47,150	100.00
Total rejected ballots			342	–
Turnout			49,492	58.6