The Political Record · Federal electoral districts

Markham—Unionville

Federal riding · ON · No. 35058 · 2023 representation order
Fig. 1 — Markham—Unionville, 2023 boundaries.
Member
Michael Ma Liberal
2025 result
Conservative gain by 1,922 votes
Turnout
63.9% of 84,154 electors
Population
116,970 2021 census
Area
86 km²
Figures as of
2026-09-25
Distinctions · ranked against all 343 ridings
  • Smallest Indigenous share: 0.1% report an Indigenous identity, 3rd lowest of 343 (Share with an Indigenous identity, 2021 census)3rd
    Smallest Indigenous share
    0.1% report an Indigenous identity, 3rd lowest of 343 (Share with an Indigenous identity, 2021 census)
  • Largest immigrant share: 61.1% are immigrants, 5th highest of 343 (Share who are immigrants, 2021 census)5th
    Largest immigrant share
    61.1% are immigrants, 5th highest of 343 (Share who are immigrants, 2021 census)
  • Changed hands in 2025: One of 58 of 343 ridings where the winning party changed from the transposed 2021 result (21 of 122 in Ontario)58
    Changed hands in 2025
    One of 58 of 343 ridings where the winning party changed from the transposed 2021 result (21 of 122 in Ontario)
In brief
  1. Michael Ma took the seat for the Conservatives by 1,922 votes (+3.6 points).
  2. The riding shrank in 2023: it keeps 97% of the old Markham—Unionville.
  3. Election-day and advance voters agreed on the winner; 62.7% of votes were cast on the day.
  4. Share who are immigrants is the 5th highest of 343 ridings.
Illustration after: © House of Commons
Member of Parliament
Michael Ma
Liberal · first elected 2025-04-28 · first term
  • Member: Industry and Technology
  • Member: Public Accounts
73 speeches in the 45th Parliament, most often on Business of Supply — Main Estimates, 2025-26.

IDid this riding change?

Yes — it shrank. All of today's Markham—Unionville comes from the old Markham—Unionville, but it is only 97% of that riding. The rest went elsewhere.

Share of today's areaFormer riding
100.0%Markham—Unionville 97% of it kept
How this is measured. Share of the current riding's area that came from each former riding, by intersecting the 2013 and 2023 boundary files. It is area, not population. Elections Canada counts 48 of 343 ridings as entirely unchanged.

IIThe 2025 result

Conservative gain
Elected
Michael Ma
Conservative
27,055
50.7% of valid votes
Margin
1,922
votes · +3.6 pts
Runner-up
Peter Yuen
Liberal
25,133
47.1% of valid votes
Conservative 50.7% · Liberal 47.1% · New Democratic 1.4%
Turnout63.9% of 84,154 electors
CandidatePartyVotes%2021±
Michael MaConservative27,05550.7%42.0%+8.7
Peter YuenLiberal25,13347.1%47.7%−0.6
Sameer QureshiNew Democratic7231.4%6.5%−5.1
1 further candidate, under 1% of the vote
Elvin KaoGreen5030.9%
The 2021 column is Elections Canada's official transposition of the 2021 result onto these 2023 boundaries. ± is the change in each party's share. It is not "swing": with four or more competitive parties there is no single pair to swing between.

IIIHow close was it, really

Swing needed to flip
1.8 pts
Half the margin: the share that would have had to move from first to second.
Third place vs. the margin
723 votes
New Democratic took fewer than the 1,922-vote margin.
Election-day polls won by others
46 of 186
1 poll ended in an exact tie.
Fig. 2 — Each square is one election-day poll: ■ won by the Conservatives (139) · ■ won by another party (46) · ▨ tied (1).
Flip the seatHypothetical

It would have taken 962 voters switching from Conservative to Liberal — 1.8% of the 53,414 valid votes, 1.8 points — to change the result. No ballot was cast this way; this only moves votes between the top two.

Conservative27,055
Liberal25,133
Still Conservative by 1,922 votes. Actual margin: 1,922.

IVElection day versus advance

Only 62.7% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.

Election dayAdvance & specialGap
Conservative52.7%47.2%−5.5
Liberal44.8%50.9%+6.1
New Democratic1.4%1.2%−0.2
Green1.1%0.7%−0.4
An association, not a cause. Voters who cast ballots before election day differed from those who turned out on the day. It does not say why. There is no poll-level turnout figure on this page: the elector count on a polling division includes people who voted in advance and were counted elsewhere.

VWhat kind of place this is

2021 Census, keyed to the 2023 representation order. Comparisons are against the median riding, not Canada as a whole. Each rule places this riding among all 343.

VIWhere it is

loading basemap…
Fig. 3 — Markham—Unionville and its 5 neighbouring ridings.

The card

No. 35058ON · 2025
Markham—Unionville
Michael Ma
Result
Conservative gain by 1,922
Turnout
63.9%
Population
116,970
Area
86 km²
Smallest Indigenous share: 0.1% report an Indigenous identity, 3rd lowest of 343 (Share with an Indigenous identity, 2021 census)3rdSmallest Indigenous shareLargest immigrant share: 61.1% are immigrants, 5th highest of 343 (Share who are immigrants, 2021 census)5thLargest immigrant shareChanged hands in 2025: One of 58 of 343 ridings where the winning party changed from the transposed 2021 result (21 of 122 in Ontario)58Changed hands in 2025
One of 343The Political Record

A card exists for every one of the 343 ridings.

Every figure on it is the figure on this page: the 2025 result and margin, turnout, the 2021 census population, the area, and the distinctions ranked against all 343 ridings. The portrait is an illustration after the official House of Commons photograph.

Open a neighbour to collect the next one.