Sarnia—Lambton (provincial electoral district)

For the federal electoral district, see Sarnia—Lambton (federal electoral district).

Sarnia—Lambton is a provincial electoral district in southwestern Ontario, Canada. It elects one member to the Legislative Assembly of Ontario.

Sarnia—Lambton

Ontario electoral district
Sarnia—Lambton in relation to other southwestern Ontario electoral districts
Provincial electoral district
Legislature	Legislative Assembly of Ontario
MPP	Bob Bailey Progressive Conservative
District created	1999
First contested	1999
Last contested	2025
Demographics
Population (2016)	105,335
Electors (2018)	84,296
Area (km²)	1,755
Pop. density (per km²)	60
Census division(s)	Lambton County
Census subdivision(s)	Sarnia, St. Clair, Plympton-Wyoming, Petrolia, Enniskillen, Point Edward

The riding was created in 1999 from Sarnia and from part of Lambton when ridings in Ontario were redrawn to match federal ridings.

From 1999 to 2007, the riding consisted of the municipalities of Sarnia, Point Edward, St. Clair and Sarnia 45. For the 2007 election, it gained the municipalities of Petrolia, Plympton-Wyoming, Oil Springs and Enniskillen.

Members of Provincial Parliament

Sarnia—Lambton
Assembly	Years	Member		Party
Riding created from Sarnia and Lambton
37th	1999–2003		Caroline Di Cocco	Liberal
38th	2003–2007
39th	2007–2011		Bob Bailey	Progressive Conservative
40th	2011–2014
41st	2014–2018
42nd	2018–2022
43rd	2022–present

Election results

Winning party in each polling division of Sarnia—Lambton at the 2025 Ontario general election

2025 Ontario general election
** Preliminary results — Not yet official **
Party	Candidate	Votes	%	±%	Expenditures
	Progressive Conservative	Bob Bailey	22,726	52.0	–0.7
	New Democratic	Candace Young	8,716	19.9	–3.7
	Liberal	Rachel Willsie	8,134	18.6	+8.1
	New Blue	Keith Benn	1,923	4.4	–2.4
	Independent	Nathan Colquhoun	890	2.0	N/A
	Green	Pamela Reid	840	1.9	–1.3
	Libertarian	Jacques Boudreau	590	1.3	N/A
	Ontario Party	Mark Lamore	359	0.8	–0.1
	Populist	Tom Stoukas	151	0.3	–2.1
Total valid votes/expense limit
Total rejected, unmarked, and declined ballots
Turnout				50.3	+3.6
Eligible voters			88,116
	Progressive Conservative hold		Swing		+1.5
Source: Elections Ontario[1]

Winning party in each polling division of Sarnia—Lambton at the 2022 Ontario general election

v t e 2022 Ontario general election
Party	Candidate	Votes	%	±%	Expenditures
	Progressive Conservative	Bob Bailey	21,184	52.72	−0.02	$29,549
	New Democratic	Dylan Stelpstra	9,489	23.62	−13.75	$34,373
	Liberal	Mark Russell	4,200	10.45	+6.03	$0
	New Blue	Keith Benn	2,719	6.77		$13,739
	Green	Mason Bourdeau	1,266	3.15	−0.50	$0
	Populist	Carla Olson	972	2.42		$0
	Ontario Party	Ian Orchard	351	0.87		$0
Total valid votes/expense limit			40,181	99.22	+0.19	$121,429
Total rejected, unmarked, and declined ballots			315	0.78	-0.19
Turnout			40,496	46.69	-14.20
Eligible voters			86,320
	Progressive Conservative hold		Swing		+6.86
Source(s) "Summary of Valid Votes Cast for Each Candidate" (PDF). Elections Ontario. 2022. Archived from the original on 2023-05-18. "Statistical Summary by Electoral District" (PDF). Elections Ontario. 2022. Archived from the original on 2023-05-21.

2018 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Bob Bailey	26,811	52.75	+10.74
	New Democratic	Kathy Alexander	18,995	37.37	+1.60
	Liberal	Neil Wereley	2,246	4.42	-13.55
	Green	Kevin Shaw	1,856	3.65	-0.96
	Trillium	Andy Bruziewicz	601	1.18
	None of the Above	Jeff Lozier	250	0.49
	Independent	Fanina R. Kodre	71	0.14
Total valid votes			50,830	100.0
Turnout				61.56
Eligible voters			82,566
Source: Elections Ontario[2]

2014 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Bob Bailey	18,722	41.01	-7.23
	New Democratic	Brian White	16,327	35.77	+10.28
	Liberal	Anne Marie Gillis	8,152	17.86	-3.97
	Green	Kevin Shaw	2,109	4.62	+3.22
	Libertarian	Andrew K. Falby	340	0.74	+0.35
Total valid votes			45,650	100.00
	Progressive Conservative hold		Swing		-8.76
Source: Elections Ontario[3]

2011 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Bob Bailey	19,570	48.32	+10.16
	New Democratic	Brian White	10,307	25.45	-1.37
	Liberal	Stephanie Barry	8,819	21.78	-7.63
	Independent	Andy Bruziewicz	1,077	2.66
	Green	Jason Vermette	567	1.40	-4.22
	Freedom	Andrew K. Falby	160	0.40
Total valid votes			40,500	100.00
Total rejected, unmarked and declined ballots			199	0.49
Turnout			40,699	51.75
Eligible voters			78,646
	Progressive Conservative hold		Swing		+5.77
Source: Elections Ontario[4]

2007 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Bob Bailey	16,145	38.16	+6.29
	Liberal	Caroline Di Cocco	12,443	29.41	-16.80
	New Democratic	Barb Millitt	11,349	26.82	+10.36
	Green	Tim van Bodegom	2,376	5.62
Total valid votes			42,313	100.00
	Progressive Conservative gain from Liberal		Swing	+11.54

^ Change is from redistributed results

2003 Ontario general election
Party	Candidate	Votes	%	±%
	Liberal	Caroline Di Cocco	18,179	47.54	-1.37
	Progressive Conservative	Henk Vanden Ende	11,852	30.99	-10.97
	New Democratic	Glenn Sonier	6,482	16.95	+9.13
	Green	Bradley Gray	1,414	3.70
	Freedom	Andrew K. Falby	316	0.83	-0.47
Total valid votes			38,243	100.00

Swing: 4.80% from PC to Lib (Lib hold)

1999 Ontario general election
Party	Candidate	Votes	%
	Liberal	Caroline Di Cocco	19,440	48.91
	Progressive Conservative	David Boushy	16,679	41.96
	New Democratic	Mark Kotanen	3,110	7.82
	Freedom	Andrew K. Falby	517	1.30
Total valid votes			39,746	100.00

2007 electoral reform referendum

2007 Ontario electoral reform referendum
Side		Votes	%
	First Past the Post	27,801	67.2
	Mixed member proportional	13,594	32.8
	Total valid votes	41,395	100.0