The Political Record · Federal electoral districts
Ottawa South
Ottawa-Sud
Federal riding · ON · No. 35080 · 2023 representation order
- Member
- David McGuinty Liberal
- 2025 result
- Liberal hold by 25,378 votes
- Turnout
- 69.2% of 96,956 electors
- Population
- 126,780 2021 census
- Area
- 100 km²
- Figures as of
- 2026-09-25
Distinctions · ranked against all 343 ridings
- Population, largest first126,780 people, 2021 census · 14th of 343 in Canada
- Length of the ballot7 candidates stood · 24th of 343 in Canada
- Width of the marginWon by 38.1 points (25,378 votes) · 55th of 343 in Canada
In brief
Illustration after: © House of Commons
Member of Parliament
David McGuinty
- Minister of National Defence
IDid this riding change?
Yes. 33% of today's Ottawa South came from ridings other than the old Ottawa South.
Share of today's areaFormer riding
67.2%Ottawa South 88% of it kept
32.8%Carleton 3% 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
Liberal hold
Elected
David McGuinty
Liberal
43,388
65.2% of valid votes
Margin
25,378
votes · +38.1 pts
Runner-up
Blair Turner
Conservative
18,010
27.1% of valid votes
Liberal 65.2% · Conservative 27.1% · New Democratic 6.0% · Green 1.0%
Turnout69.2% of 96,956 electors
| Candidate | Party | Votes | % | 2021 | ± |
|---|---|---|---|---|---|
| David McGuinty | Liberal | 43,388 | 65.2% | 48.9% | +16.3 |
| Blair Turner | Conservative | 18,010 | 27.1% | 26.7% | +0.4 |
| Hena Masjedee | New Democratic | 4,017 | 6.0% | 18.0% | −12.0 |
| Nira Dookeran | Green | 642 | 1.0% | 2.2% | −1.2 |
3 further candidates, each under 1% of the vote
| Alex Perrier | Other | 259 | 0.4% |
| William Cooper | Other | 155 | 0.2% |
| John Redins | Other | 93 | 0.1% |
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
19.1 pts
Half the margin: the share that would have had to move from first to second.
Third place vs. the margin
4,017 votes
New Democratic took fewer than the 25,378-vote margin.
Election-day polls won by others
2 of 207
No poll ended in a tie.
Flip the seatHypothetical
It would have taken 12,690 voters switching from Liberal to Conservative — 19.1% of the 66,564 valid votes, 19.1 points — to change the result. No ballot was cast this way; this only moves votes between the top two.
Liberal43,388
Conservative18,010
Still Liberal by 25,378 votes. Actual margin: 25,378.
IVElection day versus advance
Only 51.0% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.
Election dayAdvance & specialGap
Liberal62.2%68.3%+6.1
Conservative28.8%25.2%−3.6
New Democratic6.9%5.2%−1.7
Green1.1%0.8%−0.3
Other1.0%0.5%−0.5
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
- Median total household income is $91,000 — a little higher than the median riding's $84,000.highestlowest108th highest of 343
- Median age is 37.6 — a little lower than the median riding's 41.6.highestlowest52nd lowest of 343
- Share aged 25-64 with a bachelor's degree or higher is 45.2% — about 1.6 times the median riding's 28.2%.highestlowest62nd highest of 343
- Share who are immigrants is 34.6% — about 2.0 times the median riding's 17.3%.highestlowest80th highest of 343
- Share of households that own their home is 58.1% — about 81 percent of the median riding's 71.4%.highestlowest81st lowest of 343
- Share with French as a mother tongue is 10.5% — about 6.6 times the median riding's 1.6%.highestlowest93rd highest of 343
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
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The card
No. 35080ON · 2025
Ottawa South
David McGuinty
- Result
- Liberal hold by 25,378
- Turnout
- 69.2%
- Population
- 126,780
- Area
- 100 km²
Population, largest firstLength of the ballotWidth of the margin
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.