Timeline of Canadian provincial/federal Electoral Reform -- instances where there was more than just re-districting and where a new election system was adopted

1867 - Quebec held its first election as province using FPTP. (Previously it had used mixture of Block Voting in MMDs and single-winner First Past the Post (FPTP) (otherwise known as Single Member Plurality).

(1870 - BC began to use a mixture of Block Voting in MMDs and FPTP when it joined Confederation)

1886 - Ontario -- Three Toronto MLAs elected in an MMD using Limited Voting. (Previously it had used single-winner First Past The Post (FPTP).)

1891 - North-West Territories adopted an MMD and Block Voting.  (previously had only used FPTP)

1894 - Ontario adopted FPTP to elect all MLAs.

1894 - North-West Territories adopted FPTP to elect all members

1900 - Yukon adopted Block Voting in MMDs to elect all elected members (some were appointed)

1903 - Yukon adopted mixed FPTP and Block Voting.

1905 - Yukon adopted FPTP to elect all members

(1905 Alberta and Saskatchewan held their first elections as provinces using FPTP)

1909 - Alberta adopted mixed FPTP and Block Voting in MMD. DM in MMDs peaked at 5 during use of Block Voting.

1909 - Yukon adopted Block Voting in MMDs to elect all elected members (some were appointed)

1914 - Manitoba used mixed system of FPTP and one MMD where post/seat system was used. (previously used FPTP)

1914 - Ontario adopted mixed FPTP and Block Voting in three Toronto MMDs.

1920 - Yukon adopted FPTP to elect all members

1920 - Manitoba adopted mixed FPTP and STV in Winnipeg (DM-10)

1920 - Saskatchewan adopted mixed FPTP and Block Voting. ( (previously had only used FPTP)

1923 - Manitoba adopted mixed Instant-Runoff Voting and STV in Winnipeg (DM-10)

1924 - Alberta adopted mixed STV and Instant-Runoff Voting.

1926 - Ontario adopted FPTP to elect all MLAs

1952 - BC adopted Instant-Runoff Voting to elect all its MLAs, including both those in single-member districts and those in multi-member districts.

1954 - BC adopted mixed FPTP and Block Voting in MMDs.

1955 - Manitoba adopted FPTP to elect all MLAs

1956 - Alberta adopted FPTP to elect all MLAs

1967 - Saskatchewan adopted FPTP to elect all members

1967 - New Brunswick  adopted mixed FPTP and Block Voting. (previously had only used Block Voting in MMDs)

1968 - federal elections stopped using Block Voting at all. Halifax and Queen's were divided into single-member districts. Federal elections adopted FPTP to elect all MPs.

1974 - New Brunswick first used FPTP to elect all members

1975 - Newfoundland and Labrador adopted FPTP to elect all members

1978 - Nova Scotia adopted FPTP to elect all members

1990 - BC adopted FPTP to elect all MLAs

1996 - PEI adopted FPTP to elect all MLAs.

(Previously PEI elections had been special cases, a special kind of post/seat election system. Each district elected two members. At one time voters who owned property in the district voted for the Councilman while voters resident in the district joined with the property-owners to vote for the Assemblyman. Later the exact same voters were allowed to vote for each of the two members in a district, but still each seat was filled in separate contest.)

(2025 - Yukon to vote on change to IRV to elect all its members at time of 2025 T election)

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Instances of ER largest DM

NL 1 2 (Harbour Main 1949-1975)

NB 2 2

NS 1 4 (Cape Breton 1916-1925)

PEI 1 2

ON 4 3

QU 1 3 (Montreal and QU City 1858-1861)

MB 3 10 (Winnipeg 1920-1949)

SK 2 3

AB 3 7 (Edmonton 1952, 1955)

BC 3 6 (Vanc. City 1916-1933)

NWT 2 2

Yukon 5 2

Nunavut 0 1

federal elections 1 2 (Halifax 1867-1968); Queen's PEI -1968)

TOTAL 29