The Political Record · Federal electoral districts
Châteauguay—Les Jardins-de-Napierville
Federal riding · QC · No. 24017 · 2023 representation order
- Member
- Nathalie Provost Liberal
- 2025 result
- Liberal gain by 10,064 votes
- Turnout
- 69.3% of 91,599 electors
- Population
- 114,945 2021 census
- Area
- 1,554 km²
- Figures as of
- 2026-09-25
Distinctions · ranked against all 343 ridings
- Changed hands in 2025One of 58 of 343 ridings where the winning party changed from the transposed 2021 result (12 of 78 in Quebec)
- Length of the ballot6 candidates stood · 61st of 343 in Canada
- Population, largest first114,945 people, 2021 census · 134th of 343 in Canada
In brief
- Nathalie Provost took the seat for the Liberals by 10,064 votes (+16.1 points).
- 37% of today's riding was drawn from other ridings in 2023.
- Election-day and advance voters agreed on the winner; 64.4% of votes were cast on the day.
- Share with French as a mother tongue is the 54th highest of 343 ridings.
Illustration after: © House of Commons
Member of Parliament
Nathalie Provost
- Secretary of State (Nature)
IDid this riding change?
Yes. 37% of today's Châteauguay—Les Jardins-de-Napierville came from ridings other than the old Châteauguay—Lacolle.
Share of today's areaFormer riding
62.7%Châteauguay—Lacolle
37.3%Salaberry—Suroît 24% 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 gain
Elected
Nathalie Provost
Liberal
28,224
45.2% of valid votes
Margin
10,064
votes · +16.1 pts
Runner-up
Patrick O'Hara
Bloc Québécois
18,160
29.1% of valid votes
Liberal 45.2% · Bloc Québécois 29.1% · Conservative 21.7% · New Democratic 2.2% · Green 1.2%
Turnout69.3% of 91,599 electors
| Candidate | Party | Votes | % | 2021 | ± |
|---|---|---|---|---|---|
| Nathalie Provost | Liberal | 28,224 | 45.2% | 35.7% | +9.5 |
| Patrick O'Hara | Bloc Québécois | 18,160 | 29.1% | 35.8% | −6.7 |
| David De Repentigny | Conservative | 13,538 | 21.7% | 11.9% | +9.8 |
| Hannah Wolker | New Democratic | 1,377 | 2.2% | 7.7% | −5.5 |
| Martine Desrochers | Green | 773 | 1.2% | 1.5% | −0.3 |
1 further candidate, under 1% of the vote
| Nicolas Guérin | People's | 429 | 0.7% |
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
8.1 pts
Half the margin: the share that would have had to move from first to second.
Third place vs. the margin
13,538 votes
Conservative took more than the 10,064-vote margin. True in 100 of 343 ridings in 2025.
Election-day polls won by others
85 of 216
5 polls ended in an exact tie.
Flip the seatHypothetical
It would have taken 5,033 voters switching from Liberal to Bloc Québécois — 8.1% of the 62,501 valid votes, 8.1 points — to change the result. No ballot was cast this way; this only moves votes between the top two.
Liberal28,224
Bloc Québécois18,160
Still Liberal by 10,064 votes. Actual margin: 10,064.
IVElection day versus advance
Only 64.4% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.
Election dayAdvance & specialGap
Liberal41.2%52.2%+11.0
Bloc Québécois29.7%27.9%−1.8
Conservative24.4%16.7%−7.7
New Democratic2.4%1.8%−0.6
Green1.5%0.8%−0.7
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 $82,000 — about the same as the median riding's $84,000.highestlowest167th lowest of 343
- Median age is 41.6 — about the same as the median riding's 41.6.highestlowest163rd highest of 343
- Share aged 25-64 with a bachelor's degree or higher is 18.1% — about 64 percent of the median riding's 28.2%.highestlowest69th lowest of 343
- Share who are immigrants is 12.3% — about 71 percent of the median riding's 17.3%.highestlowest136th lowest of 343
- Share of households that own their home is 74.2% — a little higher than the median riding's 71.4%.highestlowest129th highest of 343
- Share with French as a mother tongue is 71.6% — about 44.7 times the median riding's 1.6%.highestlowest54th 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. 24017QC · 2025
Châteauguay—Les Jardins-de-Napierville
Nathalie Provost
- Result
- Liberal gain by 10,064
- Turnout
- 69.3%
- Population
- 114,945
- Area
- 1,554 km²
Changed hands in 2025Length of the ballotPopulation, 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.