The Political RecordFederal electoral districtsNo. 35081Ontario

Ottawa—Vanier—Gloucester

Ottawa—Vanier—Gloucester is a federal riding in Ontario. Mona Fortier (Liberal, first elected to the House in 2017) represents Ottawa—Vanier—Gloucester. Mona Fortier (Liberal) held Ottawa—Vanier—Gloucester for the Liberals in the 2025 election by 31,301 votes (45.9 points), with 67.4% of the vote. Dean Wythe (Conservative) was second with 21.5%, on a turnout of 69.3% of 99,345 electors. Member as of 2026-11-01.

Fig. 1 — Ottawa—Vanier—Gloucester on the board, 2023 boundaries; the ridings next door as the House holds them on 2026-11-01. Open it on the board →

Who represents Ottawa—Vanier—Gloucester

Mona Fortier's piece from the board. Illustration after the official portrait © House of Commons.

Mona Fortier

Member of Parliament for Ottawa—Vanier—Gloucester

Liberal

MP since 2017-04-03 · 4 terms

Parliamentary Secretary to the Minister of Foreign Affairs
Foreign Affairs and International Development committee
Subcommittee on Agenda and Procedure

63 speeches in the 45th Parliament, most often on Foreign Affairs.

Contact and office · House of Commons →

The 2025 result: Liberal hold

Share of the valid votes by candidate, Ottawa—Vanier—Gloucester, April 28, 2025

Shares of the 68,183 valid votes; a candidate under 1% is counted with the others. Source: Elections Canada, official voting results, the 2025 general election.

The figures

Candidate	Party	Votes	Share
Mona Fortier	Liberal	45,934	67.4%
Dean Wythe	Conservative	14,633	21.5%
Tristan Oliff	New Democratic	5,164	7.6%
Christian Proulx	Green	1,345	2.0%
Others (4)		1,107	1.6%

Mona Fortier (Liberal) won Ottawa—Vanier—Gloucester on April 28, 2025 with 45,934 votes, 67.4% of the 68,183 valid votes. Dean Wythe (Conservative) was second with 14,633 (21.5%), 31,301 votes and 45.9 points behind.

Of the 68,183 valid votes, Mona Fortier (Liberal) took 67.4%, Dean Wythe (Conservative) 21.5%, Tristan Oliff (New Democratic) 7.6% and Christian Proulx (Green) 2.0%; the 4 other candidates took 1.6% together. Turnout was 69.3% of 99,345 electors: 68,888 ballots cast, 68,183 of them valid, for 8 candidates.

Since 2021

Against the 2021 result on these boundaries, the Liberals are up 18.9 (48.5% to 67.4%), the Conservatives up 1.2 (20.3% to 21.5%), the New Democrats down 15.4 (23.0% to 7.6%) and the Greens down 1.0 (3.0% to 2.0%), in points of the valid votes.

2021 is Elections Canada's transposition of that election onto the 2023 boundaries, not an election held on these lines.

Since 2004: a Liberal stronghold

The party first in Ottawa—Vanier—Gloucester at each general election, 2004 to 2025, on today's boundaries

2004Liberal48.6%by 22.4 points over the Conservatives
2006Liberal41.9%by 11.7 points over the Conservatives
2008Liberal45.3%by 15.8 points over the Conservatives
2011Liberal38.2%by 8.9 points over the Conservatives
2015Liberal57.7%by 37.9 points over the Conservatives
2019Liberal51.4%by 30.8 points over the New Democrats
2021Liberal48.5%by 25.5 points over the New Democrats
2025Liberal67.4%by 45.9 points over the Conservatives

Each election carried onto today's boundaries by where the riding's 2025 electors lived: our estimate to 2019, Elections Canada's transposition for 2021, the official result for 2025. Parties are counted as they ran.

The figures

Year	First	Share	Second	Margin (pts)	Basis
2004	Liberal	48.6%	Conservative	22.4	carried, our estimate
2006	Liberal	41.9%	Conservative	11.7	carried, our estimate
2008	Liberal	45.3%	Conservative	15.8	carried, our estimate
2011	Liberal	38.2%	Conservative	8.9	carried, our estimate
2015	Liberal	57.7%	Conservative	37.9	carried, our estimate
2019	Liberal	51.4%	New Democratic	30.8	carried, our estimate
2021	Liberal	48.5%	New Democratic	25.5	transposed by Elections Canada
2025	Liberal	67.4%	Conservative	45.9	official result

The Liberals were first here at all eight general elections from 2004 to 2025, by an average of 24.9 points over the next party. In 2025 the Liberals took 67.4% of the vote here, 20.0 points above their average of 47.4% at the seven general elections from 2004 to 2021. The Liberals have been first here at every general election since 1979, fifteen in a row.

On today's boundaries the Liberals were first here in 2004 (48.6%), 2006 (41.9%), 2008 (45.3%), 2011 (38.2%), 2015 (57.7%), 2019 (51.4%), 2021 (48.5%) and 2025 (67.4%), each with the share of the valid votes shown.

A stronghold is a party first at every general election since 2004, by an average of 20 points or more over the next party; held, first at every one; usually, first at all but one. By-elections are not counted. By this rule 77 of the 343 ridings are strongholds. The results before 2021 are carried onto today's boundaries by where the riding's 2025 electors lived: our estimate, from the older boundaries of Taylor, Lucas, Kirby and Hewitt and the results in Sevi's "Who Runs?". 2021 is Elections Canada's transposition, and 2025 the official result.

Before 2025

2021 Liberal · Mona Fortier, by 14,759 votes (25.4 pts)
2019 Liberal · Mona Fortier, by 19,163 votes (30.0 pts)
2015 Liberal · Mauril Bélanger, by 24,280 votes (38.4 pts)

In Ottawa—Vanier on the 2013 boundaries, the riding most of the 2025 electors in today's Ottawa—Vanier—Gloucester lived in; Elections Canada's official results.

What kind of place Ottawa—Vanier—Gloucester is

Population: 126,9202021 census
Area: 57km²
Density: 2,242people per km²
Electors: 99,345on the 2025 lists

Distinctions · ranked against all 343 ridings

Won every election-day poll
All 217 election-day polls went to the winner · one of 15 of 343
2nd-widest margin in Ontario
Won by 45.9 points (31,301 votes) · 2nd of 122 in Ontario · 24th of 343 in Canada

Share of households that own their home is 44.0% — about 62 percent of the median riding's 71.4%.
highestlowest32nd lowest of 343
Share aged 25-64 with a bachelor's degree or higher is 47.5% — about 1.7 times the median riding's 28.2%.
highestlowest56th highest of 343
Share with French as a mother tongue is 23.2% — about 14.5 times the median riding's 1.6%.
highestlowest84th highest of 343
Median total household income is $77,500 — a little lower than the median riding's $84,000.
highestlowest121st lowest of 343
Median age is 40.4 — about the same as the median riding's 41.6.
highestlowest123rd lowest of 343
Share who are immigrants is 26.2% — about 1.5 times the median riding's 17.3%.
highestlowest123rd highest of 343

2021 Census on the 2023 boundaries; each rule places this riding among all 343. Density is the census population over the riding's area.

IDid this riding change?

Yes. 93% of the 2025 electors in today's Ottawa—Vanier—Gloucester lived in the old Ottawa—Vanier; by area, 18% of the riding came from other ridings.

Share of today's electorsFormer riding

93.4%Ottawa—Vanier 81.9% of the area · 99% of it kept

6.6%Orléans 18.0% of the area · 5% of it kept

How this is measured. Electors: the share of the current riding's 2025 ordinary-list electors who lived in each former riding, each 2025 polling division placed in the 2013 riding a point inside it falls in. Area: the share of the current riding's area that came from each former riding, by intersecting the 2013 and 2023 boundary files, and how much of the former riding that part was. Area is land, not population. Elections Canada counts 48 of 343 ridings as entirely unchanged.

IIThe 2025 result

Candidate	Party	Votes	%	2021	±
Mona Fortier	Liberal	45,934	67.4%	48.5%	+18.9
Dean Wythe	Conservative	14,633	21.5%	20.3%	+1.2
Tristan Oliff	New Democratic	5,164	7.6%	23.0%	−15.4
Christian Proulx	Green	1,345	2.0%	3.0%	−1.0

4 further candidates, each under 1% of the vote

Marty Simms	People's	349	0.5%
Coreen Corcoran	Other	338	0.5%
Elizabeth Benoit	Independent	238	0.3%
Christian Legeais	Other	182	0.3%

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

Third place vs. the margin

5,164 votes

New Democratic took fewer than the 31,301-vote margin.

Election-day polls won by others

0 of 217

No poll ended in a tie.

Fig. 2 — Each square is one election-day poll: ■ won by the Liberals (217) · ■ won by another party (0).

Flip the seatHypothetical

It would have taken 15,651 voters switching from Liberal to Conservative — 23.0% of the 68,183 valid votes, 22.9 points — to change the result. No ballot was cast this way; this only moves votes between the top two.

Voters who switch: 0031,302

Liberal45,934

Conservative14,633

Still Liberal by 31,301 votes. Actual margin: 31,301.

IVElection day versus advance

Only 54.4% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.

On election day the Liberals took 64.0%, the Conservatives 24.0%, the New Democrats 8.1%, the Greens 2.0% and the others 0.9%; in advance and special ballots, 71.4%, 18.5%, 7.0%, 1.9% and 0.6%, in that order.

Share of the valid votes by party, election-day polls against advance and special ballots, Ottawa—Vanier—Gloucester, April 28, 2025

Shares of the valid votes cast at election-day polls, and of those cast at advance polls, at mobile polls and by special ballot; the gap is the second less the first, in points. Source: Elections Canada, poll-by-poll results, the 2025 general election.

The figures

Party	Election day	Advance and special	Gap
Liberal	64.0%	71.4%	+7.4
Conservative	24.0%	18.5%	−5.5
New Democratic	8.1%	7.0%	−1.1
Green	2.0%	1.9%	−0.1
Other	0.9%	0.6%	−0.3

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.

VWhere it is

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Fig. 3 — Ottawa—Vanier—Gloucester and its 6 neighbouring ridings.

Sources and citation

"Ottawa—Vanier—Gloucester — federal riding profile and 2025 results."
The Political Record. https://politicalrecord.ca/riding/ottawa-vanier-gloucester/
Accessed 2026-11-10.

Results and transposition: Elections Canada. Boundaries: Elections Canada / Statistics Canada, Open Government Licence – Canada. Census: Statistics Canada 2021 Census. Member: House of Commons.

Figures reconcile to the certified national total of 19,641,663 votes. The member is as the House of Commons listed them on 2026-11-01. Page built 2026-11-10.