The Political RecordFederal electoral districtsNo. 24069Quebec

Saint-Léonard—Saint-Michel

Saint-Léonard—Saint-Michel is a federal riding in Quebec. Patricia Lattanzio (Liberal, first elected to the House in 2019) represents Saint-Léonard—Saint-Michel. Patricia Lattanzio (Liberal) held Saint-Léonard—Saint-Michel for the Liberals in the 2025 election by 18,376 votes (44.7 points), with 65.3% of the vote. Panagiota Koroneos (Conservative) was second with 20.6%, on a turnout of 58.0% of 72,428 electors. Member as of 2026-11-01.

Fig. 1 — Saint-Léonard—Saint-Michel 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 Saint-Léonard—Saint-Michel

Patricia Lattanzio's piece from the board. Illustration after the official portrait © House of Commons.

Patricia Lattanzio

Member of Parliament for Saint-Léonard—Saint-Michel

Liberal

MP since 2019-10-21 · 3 terms

Parliamentary Secretary to the Minister of Justice and Attorney General of Canada
Justice and Human Rights committee
Subcommittee on Agenda and Procedure

108 speeches in the 45th Parliament, most often on Justice.

Contact and office · House of Commons →

The 2025 result: Liberal hold

Share of the valid votes by candidate, Saint-Léonard—Saint-Michel, April 28, 2025

Shares of the 41,066 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
Patricia Lattanzio	Liberal	26,833	65.3%
Panagiota Koroneos	Conservative	8,457	20.6%
Laurie Lelacheur	Bloc Québécois	2,938	7.2%
Marwan El Attar	New Democratic	2,450	6.0%
Other (1)		388	0.9%

Patricia Lattanzio (Liberal) won Saint-Léonard—Saint-Michel on April 28, 2025 with 26,833 votes, 65.3% of the 41,066 valid votes. Panagiota Koroneos (Conservative) was second with 8,457 (20.6%), 18,376 votes and 44.7 points behind.

Of the 41,066 valid votes, Patricia Lattanzio (Liberal) took 65.3%, Panagiota Koroneos (Conservative) 20.6%, Laurie Lelacheur (Bloc Québécois) 7.2% and Marwan El Attar (New Democratic) 6.0%; one other candidate took 0.9%. Turnout was 58.0% of 72,428 electors: 42,021 ballots cast, 41,066 of them valid, for 5 candidates.

Since 2021

Against the 2021 result on these boundaries, the Liberals are down 2.9 (68.2% to 65.3%), the Conservatives up 10.3 (10.3% to 20.6%), the Bloc Québécois down 0.6 (7.8% to 7.2%) and the New Democrats down 2.0 (8.0% to 6.0%), 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 Saint-Léonard—Saint-Michel at each general election, 2004 to 2025, on today's boundaries

2004Liberal63.1%by 40.5 points over the Bloc Québécois
2006Liberal56.4%by 36.9 points over the Bloc Québécois
2008Liberal56.5%by 41.8 points over the Conservatives
2011Liberal41.7%by 9.5 points over the New Democrats
2015Liberal64.7%by 49.9 points over the New Democrats
2019Liberal61.3%by 49.4 points over the Conservatives
2021Liberal68.2%by 57.9 points over the Conservatives
2025Liberal65.3%by 44.7 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	63.1%	Bloc Québécois	40.5	carried, our estimate
2006	Liberal	56.4%	Bloc Québécois	36.9	carried, our estimate
2008	Liberal	56.5%	Conservative	41.8	carried, our estimate
2011	Liberal	41.7%	New Democratic	9.5	carried, our estimate
2015	Liberal	64.7%	New Democratic	49.9	carried, our estimate
2019	Liberal	61.3%	Conservative	49.4	carried, our estimate
2021	Liberal	68.2%	Conservative	57.9	transposed by Elections Canada
2025	Liberal	65.3%	Conservative	44.7	official result

The Liberals were first here at all eight general elections from 2004 to 2025, by an average of 41.3 points over the next party. In 2025 the Liberals took 65.3% of the vote here, 6.4 points above their average of 58.9% 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 (63.1%), 2006 (56.4%), 2008 (56.5%), 2011 (41.7%), 2015 (64.7%), 2019 (61.3%), 2021 (68.2%) and 2025 (65.3%), 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 · Patricia Lattanzio, by 24,629 votes (58.9 pts)
2019 Liberal · Patricia Lattanzio, by 22,443 votes (49.4 pts)
2015 Liberal · Nicola Di Iorio, by 22,215 votes (49.9 pts)

In the old Saint-Léonard—Saint-Michel on the 2013 boundaries, the riding most of the 2025 electors in today's Saint-Léonard—Saint-Michel lived in; Elections Canada's official results.

What kind of place Saint-Léonard—Saint-Michel is

Population: 112,9052021 census
Area: 20km²
Density: 5,702people per km²
Electors: 72,428on the 2025 lists

Distinctions · ranked against all 343 ridings

10th-fewest home owners
32.3% of households own their home, 10th lowest of 343 (Share of households that own their home, 2021 census)
Won every election-day poll
All 167 election-day polls went to the winner · one of 15 of 343
3rd-widest margin in Quebec
Won by 44.7 points (18,376 votes) · 3rd of 78 in Quebec · 29th of 343 in Canada

Share of households that own their home is 32.3% — about 45 percent of the median riding's 71.4%.
highestlowest10th lowest of 343
Median total household income is $63,200 — about 75 percent of the median riding's $84,000.
highestlowest31st lowest of 343
Share who are immigrants is 47.7% — about 2.8 times the median riding's 17.3%.
highestlowest38th highest of 343
Share with French as a mother tongue is 30.9% — about 19.3 times the median riding's 1.6%.
highestlowest80th highest of 343
Median age is 40.4 — about the same as the median riding's 41.6.
highestlowest123rd lowest of 343
Share aged 25-64 with a bachelor's degree or higher is 25.7% — a little lower than the median riding's 28.2%.
highestlowest149th lowest 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 — it shrank. All of today's Saint-Léonard—Saint-Michel, its electors as well as its ground, comes from the old Saint-Léonard—Saint-Michel, but it is only 95% of that riding by area. The rest went elsewhere.

Share of today's electorsFormer riding

100.0%Saint-Léonard—Saint-Michel 99.8% of the area · 95% 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	±
Patricia Lattanzio	Liberal	26,833	65.3%	68.2%	−2.9
Panagiota Koroneos	Conservative	8,457	20.6%	10.3%	+10.3
Laurie Lelacheur	Bloc Québécois	2,938	7.2%	7.8%	−0.6
Marwan El Attar	New Democratic	2,450	6.0%	8.0%	−2.0

1 further candidate, under 1% of the vote

Caroline Mailloux

People's

388

0.9%

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

Third place vs. the margin

2,938 votes

Bloc Québécois took fewer than the 18,376-vote margin.

Election-day polls won by others

0 of 167

No poll ended in a tie.

Fig. 2 — Each square is one election-day poll: ■ won by the Liberals (167) · ■ won by another party (0).

Flip the seatHypothetical

It would have taken 9,189 voters switching from Liberal to Conservative — 22.4% of the 41,066 valid votes, 22.4 points — to change the result. No ballot was cast this way; this only moves votes between the top two.

Voters who switch: 0018,378

Liberal26,833

Conservative8,457

Still Liberal by 18,376 votes. Actual margin: 18,376.

IVElection day versus advance

Only 68.3% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.

On election day the Liberals took 64.1%, the Conservatives 21.6%, the Bloc Québécois 6.6% and the New Democrats 6.7%; in advance and special ballots, 68.0%, 18.4%, 8.4% and 4.4%, in that order.

Share of the valid votes by party, election-day polls against advance and special ballots, Saint-Léonard—Saint-Michel, 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	64.1%	68.0%	+3.9
Conservative	21.6%	18.4%	−3.2
Bloc Québécois	6.6%	8.4%	+1.8
New Democratic	6.7%	4.4%	−2.3

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

loading basemap…

Fig. 3 — Saint-Léonard—Saint-Michel and its 5 neighbouring ridings.

Sources and citation

"Saint-Léonard—Saint-Michel — federal riding profile and 2025 results."
The Political Record. https://politicalrecord.ca/riding/saint-leonard-saint-michel/
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.