1975 Ontario general election

The 1975 Ontario general election was held on September 18, 1975, to elect the 125 members of the 30th Legislative Assembly of Ontario of the Province of Ontario, Canada.
The Ontario Progressive Conservative Party, led by Bill Davis and campaigning under the slogan, "Your Future. Your choice.", won a tenth consecutive term in office but lost its majority in the legislature for the first time since the 1945 election. The PC party lost 27 seats from its result in the previous election.
The social democratic Ontario New Democratic Party, led by Stephen Lewis with the slogan "Tomorrow starts today", doubled its representation in the legislature, and became the Official Opposition on the strength of a campaign which called for rent control in Ontario and highlighted horror stories of individuals victimized by bad landlords who imposed exorbitant rent increases. The campaign forced Davis' Tories to promise to implement rent controls shortly before the election.
The Ontario Liberal Party, led by Robert Nixon, won 16 additional seats, but lost the role of Official Opposition to the NDP. One member of its caucus was elected as a Liberal-Labour candidate.

Expansion of Legislative Assembly

An Act passed in May 1975 provided for an increase from 117 to 125 MPPs in the next Assembly:

Campaign

Candidates	PC	Lib	LL	NDP	Comm	Ind	Ltn	SC		Total
3	66	64	2	66						198
4	41	41		41	19	5	9	6	2	164
5	15	15		15	11	7	6	5	1	75
6	2	2		2	2	3		1		12
7	1	1		1	1	2		1		7
Total	125	123	2	125	33	17	15	13	3	456

Among the independent candidates, there were 12 from the Social Credit League of Ontario who were not officially recognized as such as the party did not qualify for official party status under the Election Finances Reform Act, 1975.

Opinion polls

Polling firm	Last day of survey	Source	PCO	ONDP	OLP	Other	Sample
Polling firm	Last day of survey	Source					Sample
Election 1975	September 18, 1975		36.07	28.94	34.04	0.95
	March 1975		30		42		-
Election 1971	June 9, 1977		44.5	27.1	27.8	0.6

Results

Summary

Analysis

Parties	1st	2nd	3rd	4th	5th
	51	51	23
	38	22	65
	35	52	36
	1		1
				26	7
				12	3
				10	2
				9	5
				2	1

MPPs elected by region and riding

Party designations are as follows:
;Northern Ontario
;Ottawa Valley
;Saint Lawrence Valley
;Central Ontario
;Georgian Bay
;Hamilton/Halton/Niagara
;Midwestern Ontario
;Southwestern Ontario
;Peel/York/Durham
;Metropolitan Toronto