From 1999 to 2007 it consisted of Cambridge, North Dumfries plus the city of Kitchener east of a line following Homer Watson Boulevard to Doon Village Road to Homer Watson Boulevard again, then to Huron Road to the Grand River.

In 2007, the riding included just Cambridge and North Dumfries.

Members of Provincial Parliament

Cambridge
Assembly	Years	Member		Party
*Riding created*
30th	1975–1977		Monty Davidson	New Democratic
31st	1977–1981		Monty Davidson	New Democratic
32nd	1981–1985		Bill Barlow	Progressive Conservative
33rd	1985–1987		Bill Barlow	Progressive Conservative
34th	1987–1990		Michael Farnan	New Democratic
35th	1990–1995		Michael Farnan	New Democratic
36th	1995–1999		Gerry Martiniuk	Progressive Conservative
37th	1999–2003
38th	2003–2007
39th	2007–2011
40th	2011–2014		Rob Leone
41st	2014–2018		Kathryn McGarry	Liberal
42nd	2018–2020		Belinda Karahalios	Progressive Conservative
	2020–2021			Independent
	2021–2022			New Blue
43rd	2022–present		Brian Riddell	Progressive Conservative

Election results

2022 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Brian Riddell	14,590	37.05
	New Democratic	Marjorie Knight	8,745	22.21
	Liberal	Surekha Shenoy	8,137	20.66
	New Blue	Belinda Karahalios	4,374	11.11
	Green	Carla Johnson	3,537	8.98
Total valid votes			39,383
Turnout			42.9
Eligible voters			91,805
	Progressive Conservative gain from New Blue		Swing		-
Source: Elections Ontario^[1]

2018 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Belinda Karahalios	17,793	36.97%	+4.41
	New Democratic	Marjorie Knight	15,639	32.49%	+10.88
	Liberal	Kathryn McGarry	11,191	23.25%	-15.67
	Green	Michele Braniff	3,018	6.27%	+0.61
	Libertarian	Allan Dettweiler	490	1.02%	-0.24
Total valid votes				100.0
	Progressive Conservative gain from Liberal		Swing		-
Source: Elections Ontario^[2]

2014 Ontario general election
Party	Candidate	Votes	%	±%
	Liberal	Kathryn McGarry	18,763	38.92	+5.85
	Progressive Conservative	Rob Leone	15,694	32.56	-5.13
	New Democratic	Bobbi Stewart	10,415	21.61	-3.00
	Green	Temara Brown	2,726	5.66	+3.16
	Libertarian	Allan R. Dettweiler	605	1.26	-0.23
Total valid votes			48,203	100.0
	Liberal gain from Progressive Conservative		Swing		+5.49
Source: Elections Ontario^[3]

2011 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Rob Leone	15,947	37.69	-3.97
	Liberal	Kathryn McGarry	13,993	33.07	-1.04
	New Democratic	Atinuke Bankole	10,414	24.61	+10.81
	Green	Jacques Malette	1,056	2.50	-6.43
	Libertarian	Allan Dettweiler	629	1.49
	Independent	Robert Ross	271	0.64
Total valid votes			42,310	100.00
Total rejected, unmarked and declined ballots			187	0.44
Turnout			42,497	46.04
Eligible voters			92,310
	Progressive Conservative hold		Swing		-1.47
Source: Elections Ontario^[4]

2007 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Gerry Martiniuk	17,884	41.66	-0.84
	Liberal	Kathryn McGarry	14,641	34.11	-1.08
	New Democratic	Mitchell Healey	5,923	13.80	-4.29
	Green	Colin Carmichael	3,835	8.93	+6.84
	Family Coalition	Paul Vendervet	650	1.50	-0.63
Total valid votes			42,933	100.00

2003 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Gerry Martiniuk	19,996	42.50	-12.34
	Liberal	Jerry Boyle	16,559	35.19	+12.34
	New Democratic	Pam Wolf	8,513	18.09	-1.28
	Family Coalition	Al Smith	1001	2.13	+0.29
	Green	Michael Chownyk	983	2.09	+1.00
Total valid votes			47,052	100.00

1999 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Gerry Martiniuk	24,583	54.84	+7.91
	Liberal	Jerry Boyle	10,244	22.85	+7.61
	New Democratic	Gary Gibson	8,684	19.37	-12.69
	Family Coalition	Al Smith	824	1.84	-2.75
	Green	Kathleen Morton	489	1.09
Total valid votes			44,824	100.00

1995 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Gerry Martiniuk	17,269	46.93	+34.63
	New Democratic	Mike Farnan	11,797	32.06	-28.22
	Liberal	Ben Tucci	5,606	15.24	-5.65
	Family Coalition	Al Smith	1,690	4.59	-1.94
	Independent	Reg Gervais	433	1.18
Total valid votes			36,795	100.0

1990 Ontario general election
Party	Candidate	Votes	%	±%
	New Democratic	Mike Farnan	21,806	60.28	+25.79
	Liberal	John Bell	7,557	20.89	-13.29
	Progressive Conservative	Carl DeFaria	4,449	12.30	-14.45
	Family Coalition	Anneliese Steden	2,364	6.53	+1.95
Total valid votes			36,176	100.0

1987 Ontario general election
Party	Candidate	Votes	%	±%
	New Democratic	Mike Farnan	11,284	34.49	-3.01
	Liberal	Claudette Millar	11,183	34.18	+12.02
	Progressive Conservative	Bill Barlow	8,752	26.75	-13.59
	Family Coalition	Anneliese Steden	1,500	4.58
Total valid votes			32,719	100.0

1985 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Bill Barlow	12,888	40.34	-2.48
	New Democratic	Mike Farnan	11,985	37.50	-2.43
	Liberal	Bob Jeffrey	7,083	22.16	+6.77
Total valid votes			31,956	100.0

1981 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Bill Barlow	12,597	42.82	+7.37
	New Democratic	Monty Davidson	11,748	39.93	+2.62
	Liberal	John Giles	4,527	15.39	-11.01
	Independent	George Molson Barrett	549	1.87
Total valid votes			29,421	100.0

1977 Ontario general election
Party	Candidate	Votes	%	±%
	New Democratic	Monty Davidson	11,120	37.31	-0.83
	Progressive Conservative	Bill Barlow	10,566	35.45	+6.33
	Liberal	Claudette Millar	7,870	26.40	-6.34
	Independent	John Long	252	0.85
Total valid votes			29,808	100.0

1975 Ontario general election
Party	Candidate	Votes	%
	New Democratic	Monty Davidson	11,255	38.14
	Liberal	Claudette Millar	9,662	32.74
	Progressive Conservative	Ruggles Constant	8,595	29.12
Total valid votes			29,512	100.0

2007 electoral reform referendum

2007 Ontario electoral reform referendum
Side		Votes	%
	First Past the Post	25,902	61.4
	Mixed member proportional	16,260	38.6
	Total valid votes	42,162	100.0

Sources

^ "Candidates in: Cambridge (016)". Elections Ontario. Retrieved May 21, 2022.
^ "Summary of Valid Votes Cast for each Candidate" (PDF). Elections Ontario. Archived from the original (PDF) on 28 December 2018. Retrieved 16 January 2019.
^ Elections Ontario (2014). "Official return from the records, 012 Cambridge" (PDF). Retrieved 27 June 2015.^{[permanent dead link]}
^ Elections Ontario (2011). "Official return from the records / Rapport des registres officiels - Cambridge" (PDF). Retrieved 2 June 2014.^{[permanent dead link]}

v t e Provincial ridings in Ontario
Northern	Algoma—Manitoulin Kenora—Rainy River Kiiwetinoong Mushkegowuk—James Bay Nickel Belt Nipissing Parry Sound—Muskoka Sault Ste. Marie Sudbury Thunder Bay—Atikokan Thunder Bay—Superior North Timiskaming—Cochrane Timmins
Eastern	Bay of Quinte Glengarry—Prescott—Russell Hastings—Lennox and Addington Kingston and the Islands Lanark—Frontenac—Kingston Leeds—Grenville—Thousand Islands and Rideau Lakes Renfrew—Nipissing—Pembroke Stormont—Dundas—South Glengarry
Central	Barrie—Innisfil Barrie—Springwater—Oro-Medonte Bruce—Grey—Owen Sound Dufferin—Caledon Haliburton—Kawartha Lakes—Brock Northumberland—Peterborough South Peterborough—Kawartha Simcoe—Grey Simcoe North York—Simcoe
Midwestern	Brantford—Brant Cambridge Guelph Haldimand—Norfolk Huron—Bruce Kitchener Centre Kitchener—Conestoga Kitchener South—Hespeler Oxford Perth—Wellington Waterloo Wellington—Halton Hills
Southwestern	Chatham-Kent—Leamington Elgin—Middlesex—London Essex Lambton—Kent—Middlesex London—Fanshawe London North Centre London West Sarnia—Lambton Windsor—Tecumseh Windsor West
Peel	Brampton Centre Brampton East Brampton North Brampton South Brampton West Mississauga Centre Mississauga East—Cooksville Mississauga—Erin Mills Mississauga—Lakeshore Mississauga—Malton Mississauga—Streetsville
Hamilton, Halton, and Niagara	Burlington Flamborough—Glanbrook Hamilton Centre Hamilton East—Stoney Creek Hamilton Mountain Hamilton West—Ancaster—Dundas Milton Niagara Centre Niagara Falls Niagara West Oakville North—Burlington Oakville St. Catharines
Ottawa	Carleton Kanata—Carleton Nepean Orléans Ottawa Centre Ottawa South Ottawa—Vanier Ottawa West—Nepean
Durham and York	Ajax Aurora—Oak Ridges—Richmond Hill Durham King—Vaughan Markham—Stouffville Markham—Thornhill Markham—Unionville Newmarket—Aurora Oshawa Pickering—Uxbridge Richmond Hill Thornhill Vaughan—Woodbridge Whitby
Toronto	Beaches—East York Davenport Don Valley East Don Valley North Don Valley West Eglinton—Lawrence Etobicoke Centre Etobicoke—Lakeshore Etobicoke North Humber River—Black Creek Parkdale—High Park Scarborough—Agincourt Scarborough Centre Scarborough—Guildwood Scarborough North Scarborough—Rouge Park Scarborough Southwest Spadina—Fort York Toronto Centre Toronto—Danforth Toronto—St. Paul's University—Rosedale Willowdale York Centre York South—Weston
See also: Federal ridings in Ontario List of elections Politics of Ontario

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