The Political RecordFederal electoral districtsNo. 24065Quebec

Rosemont—La Petite-Patrie

Rosemont—La Petite-Patrie is a federal riding in Quebec. The seat is vacant as of 2026-11-01. Alexandre Boulerice (NDP) held Rosemont—La Petite-Patrie for the New Democrats in the 2025 election by 5,601 votes (9.4 points), with 41.0% of the vote. Jean-Sébastien Vallée (Liberal) was second with 31.6%, on a turnout of 72.3% of 83,229 electors.

Fig. 1 — Rosemont—La Petite-Patrie 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 Rosemont—La Petite-Patrie

Vacant

No Member of Parliament for Rosemont—La Petite-Patrie as of 2026-11-01, by the House of Commons list.

Alexandre Boulerice (New Democratic) won the seat in 2025.

The 2025 result: New Democratic hold

Share of the valid votes by candidate, Rosemont—La Petite-Patrie, April 28, 2025

Shares of the 59,420 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
Alexandre Boulerice	New Democratic	24,358	41.0%
Jean-Sébastien Vallée	Liberal	18,757	31.6%
Olivier Gignac	Bloc Québécois	10,864	18.3%
Laetitia Tchatat	Conservative	4,073	6.9%
Benoît Morham	Green	1,368	2.3%

Alexandre Boulerice (New Democratic) won Rosemont—La Petite-Patrie on April 28, 2025 with 24,358 votes, 41.0% of the 59,420 valid votes. Jean-Sébastien Vallée (Liberal) was second with 18,757 (31.6%), 5,601 votes and 9.4 points behind.

Of the 59,420 valid votes, Alexandre Boulerice (New Democratic) took 41.0%, Jean-Sébastien Vallée (Liberal) 31.6%, Olivier Gignac (Bloc Québécois) 18.3%, Laetitia Tchatat (Conservative) 6.9% and Benoît Morham (Green) 2.3%. Turnout was 72.3% of 83,229 electors: 60,175 ballots cast, 59,420 of them valid, for 5 candidates.

Since 2021

Against the 2021 result on these boundaries, the New Democrats are down 6.7 (47.7% to 41.0%), the Liberals up 8.9 (22.7% to 31.6%), the Bloc Québécois down 2.7 (21.0% to 18.3%), the Conservatives up 3.0 (3.9% to 6.9%) and the Greens unchanged (2.3% to 2.3%), 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: no party has held it

The party first in Rosemont—La Petite-Patrie at each general election, 2004 to 2025, on today's boundaries

2004Bloc Québécois61.7%by 38.7 points over the Liberals
2006Bloc Québécois55.9%by 40.0 points over the Liberals
2008Bloc Québécois51.8%by 33.1 points over the Liberals
2011changed handsNew Democratic51.0%by 18.3 points over the Bloc Québécois
2015New Democratic49.2%by 28.1 points over the Bloc Québécois
2019New Democratic42.5%by 18.3 points over the Liberals
2021New Democratic47.7%by 24.9 points over the Liberals
2025New Democratic41.0%by 9.4 points over the Liberals

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	Bloc Québécois	61.7%	Liberal	38.7	carried, our estimate
2006	Bloc Québécois	55.9%	Liberal	40.0	carried, our estimate
2008	Bloc Québécois	51.8%	Liberal	33.1	carried, our estimate
2011	New Democratic	51.0%	Bloc Québécois	18.3	carried, our estimate
2015	New Democratic	49.2%	Bloc Québécois	28.1	carried, our estimate
2019	New Democratic	42.5%	Liberal	18.3	carried, our estimate
2021	New Democratic	47.7%	Liberal	24.9	transposed by Elections Canada
2025	New Democratic	41.0%	Liberal	9.4	official result

The NDP were first at five of the eight general elections from 2004 to 2025, the Bloc Québécois at three; it changed hands once. In 2025 the NDP took 41.0% of the vote here, 8.7 points above their average of 32.3% at the seven general elections from 2004 to 2021.

On today's boundaries the Bloc Québécois were first here in 2004 (61.7%), 2006 (55.9%) and 2008 (51.8%) and the NDP in 2011 (51.0%), 2015 (49.2%), 2019 (42.5%), 2021 (47.7%) and 2025 (41.0%), 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 160 of the 343 ridings have no degree. 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 New Democratic · Alexandre Boulerice, by 13,970 votes (25.4 pts)
2019 New Democratic · Alexandre Boulerice, by 10,999 votes (18.3 pts)
2015 New Democratic · Alexandre Boulerice, by 16,389 votes (28.1 pts)

In the old Rosemont—La Petite-Patrie on the 2013 boundaries, the riding most of the 2025 electors in today's Rosemont—La Petite-Patrie lived in; Elections Canada's official results.

What kind of place Rosemont—La Petite-Patrie is

Population: 112,9102021 census
Area: 11km²
Density: 10,265people per km²
Electors: 83,229on the 2025 lists

Distinctions · ranked against all 343 ridings

3rd-smallest by area in Canada
11 km² · 3rd of 343
8th-fewest home owners
31.4% of households own their home, 8th lowest of 343 (Share of households that own their home, 2021 census)
8th-smallest households
1.8 people per household, 8th lowest of 343 (Average household size, 2021 census)

Share of households that own their home is 31.4% — about 44 percent of the median riding's 71.4%.
highestlowest8th lowest of 343
Median total household income is $61,600 — about 73 percent of the median riding's $84,000.
highestlowest21st lowest of 343
Share aged 25-64 with a bachelor's degree or higher is 53.6% — about 1.9 times the median riding's 28.2%.
highestlowest34th highest of 343
Median age is 37.6 — a little lower than the median riding's 41.6.
highestlowest52nd lowest of 343
Share with French as a mother tongue is 74.2% — about 46.4 times the median riding's 1.6%.
highestlowest53rd highest of 343
Share who are immigrants is 19.9% — about 1.2 times the median riding's 17.3%.
highestlowest157th 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. 100% of the 2025 electors in today's Rosemont—La Petite-Patrie lived in the old Rosemont—La Petite-Patrie; by area, 1% of the riding came from other ridings.

Share of today's electorsFormer riding

100.0%Rosemont—La Petite-Patrie 99.4% of the area

0.0%Laurier—Sainte-Marie 0.4% of the area · 0.4% of it kept

0.0%Outremont 0.1% of the area · 0.1% 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	±
Alexandre Boulerice	New Democratic	24,358	41.0%	47.7%	−6.7
Jean-Sébastien Vallée	Liberal	18,757	31.6%	22.7%	+8.9
Olivier Gignac	Bloc Québécois	10,864	18.3%	21.0%	−2.7
Laetitia Tchatat	Conservative	4,073	6.9%	3.9%	+3.0
Benoît Morham	Green	1,368	2.3%	2.3%	+0.0

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

10,864 votes

Bloc Québécois took more than the 5,601-vote margin. True in 100 of 343 ridings in 2025.

Election-day polls won by others

44 of 187

3 polls ended in an exact tie.

Fig. 2 — Each square is one election-day poll: ■ won by the New Democrats (140) · ■ won by another party (44) · ▨ tied (3).

Flip the seatHypothetical

It would have taken 2,801 voters switching from New Democratic to Liberal — 4.7% of the 59,420 valid votes, 4.7 points — to change the result. No ballot was cast this way; this only moves votes between the top two.

Voters who switch: 005,602

New Democratic24,358

Liberal18,757

Still New Democratic by 5,601 votes. Actual margin: 5,601.

IVElection day versus advance

Only 62.8% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.

On election day the New Democrats took 40.6%, the Liberals 30.4%, the Bloc Québécois 18.5%, the Conservatives 7.9% and the Greens 2.6%; in advance and special ballots, 41.7%, 33.6%, 17.9%, 5.2% and 1.8%, in that order.

Share of the valid votes by party, election-day polls against advance and special ballots, Rosemont—La Petite-Patrie, 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
New Democratic	40.6%	41.7%	+1.1
Liberal	30.4%	33.6%	+3.2
Bloc Québécois	18.5%	17.9%	−0.6
Conservative	7.9%	5.2%	−2.7
Green	2.6%	1.8%	−0.8

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 — Rosemont—La Petite-Patrie and its 4 neighbouring ridings.

Sources and citation

"Rosemont—La Petite-Patrie — federal riding profile and 2025 results."
The Political Record. https://politicalrecord.ca/riding/rosemont-la-petite-patrie/
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.