The Political Record · Federal electoral districts
Argenteuil—La Petite-Nation
Federal riding · QC · No. 24005 · 2023 representation order
- Member
- Stéphane Lauzon Liberal
- 2025 result
- Liberal hold by 13,427 votes
- Turnout
- 64.6% of 92,957 electors
- Population
- 109,205 2021 census
- Area
- 5,405 km²
- Figures as of
- 2026-09-25
Distinctions · ranked against all 343 ridings
- Length of the ballot6 candidates stood · 61st of 343 in Canada
- Turnout, lowest first64.6% of 92,957 electors voted · 75th of 343 in Canada
- Area, largest first5,405 km² · 89th of 343 in Canada
In brief
- Stéphane Lauzon held the seat for the Liberals by 13,427 votes (+22.7 points).
- 10% of today's riding was drawn from other ridings in 2023.
- Election-day and advance voters agreed on the winner; 59.6% of votes were cast on the day.
- Share aged 25-64 with a bachelor's degree or higher is the 16th lowest of 343 ridings.
Illustration after: © House of Commons
Member of Parliament
Stéphane Lauzon
- Member: Transport, Infrastructure and Communities
IDid this riding change?
Yes. 10% of today's Argenteuil—La Petite-Nation came from ridings other than the old Argenteuil—La Petite-Nation.
Share of today's areaFormer riding
89.6%Argenteuil—La Petite-Nation 88% of it kept
9.1%Pontiac 2% of it kept
1.2%Gatineau 50% 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
Stéphane Lauzon
Liberal
28,124
47.5% of valid votes
Margin
13,427
votes · +22.7 pts
Runner-up
Martin Charron
Conservative
14,697
24.8% of valid votes
Liberal 47.5% · Conservative 24.8% · Bloc Québécois 22.8% · New Democratic 2.5% · Green 1.4% · People's 1.0%
Turnout64.6% of 92,957 electors
| Candidate | Party | Votes | % | 2021 | ± |
|---|---|---|---|---|---|
| Stéphane Lauzon | Liberal | 28,124 | 47.5% | 38.5% | +9.0 |
| Martin Charron | Conservative | 14,697 | 24.8% | 13.3% | +11.5 |
| Martin Héroux | Bloc Québécois | 13,520 | 22.8% | 32.3% | −9.5 |
| Michel Welt | New Democratic | 1,499 | 2.5% | 7.0% | −4.5 |
| Bertha Fuchsman-Small | Green | 807 | 1.4% | 0.4% | +1.0 |
| Lindsey Therrien | People's | 586 | 1.0% | 5.7% | −4.7 |
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
11.3 pts
Half the margin: the share that would have had to move from first to second.
Third place vs. the margin
13,520 votes
Bloc Québécois took more than the 13,427-vote margin. True in 100 of 343 ridings in 2025.
Election-day polls won by others
63 of 244
4 polls ended in an exact tie.
Flip the seatHypothetical
It would have taken 6,714 voters switching from Liberal to Conservative — 11.3% of the 59,233 valid votes, 11.3 points — to change the result. No ballot was cast this way; this only moves votes between the top two.
Liberal28,124
Conservative14,697
Still Liberal by 13,427 votes. Actual margin: 13,427.
IVElection day versus advance
Only 59.6% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.
Election dayAdvance & specialGap
Liberal41.8%55.9%+14.1
Conservative29.0%18.6%−10.4
Bloc Québécois23.6%21.7%−1.9
New Democratic2.8%2.1%−0.7
Green1.6%1.0%−0.6
People's1.2%0.7%−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 $74,500 — a little lower than the median riding's $84,000.highestlowest92nd lowest of 343
- Median age is 45.6 — a little higher than the median riding's 41.6.highestlowest72nd highest of 343
- Share aged 25-64 with a bachelor's degree or higher is 14.1% — about 50 percent of the median riding's 28.2%.highestlowest16th lowest of 343
- Share who are immigrants is 3.2% — about 18 percent of the median riding's 17.3%.highestlowest33rd lowest of 343
- Share of households that own their home is 73.6% — a little higher than the median riding's 71.4%.highestlowest141st highest of 343
- Share with French as a mother tongue is 86.6% — about 54.1 times the median riding's 1.6%.highestlowest36th 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
loading basemap…
The card
No. 24005QC · 2025
Argenteuil—La Petite-Nation
Stéphane Lauzon
- Result
- Liberal hold by 13,427
- Turnout
- 64.6%
- Population
- 109,205
- Area
- 5,405 km²
Length of the ballotTurnout, lowest firstArea, largest first
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.