The Political Record · Federal electoral districts
Sarnia—Lambton—Bkejwanong
Federal riding · ON · No. 35090 · 2023 representation order
- Member
- Marilyn Gladu Liberal
- 2025 result
- Conservative hold by 11,657 votes
- Turnout
- 71.7% of 107,133 electors
- Population
- 128,155 2021 census
- Area
- 4,173 km²
- Figures as of
- 2026-09-25
Distinctions · ranked against all 343 ridings
- Population, largest first128,155 people, 2021 census · 11th of 343 in Canada
- Length of the ballot7 candidates stood · 24th of 343 in Canada
- Area, largest first4,173 km² · 98th of 343 in Canada
In brief
Illustration after: © House of Commons
Member of Parliament
Marilyn Gladu
- Member: Justice and Human Rights
- Member: Status of Women
- Vice-Chair: Status of Women
IDid this riding change?
Yes. 44% of today's Sarnia—Lambton—Bkejwanong came from ridings other than the old Lambton—Kent—Middlesex.
Share of today's areaFormer riding
55.8%Lambton—Kent—Middlesex 39% of it kept
44.2%Sarnia—Lambton
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
Conservative hold
Elected
Marilyn Gladu
Conservative
40,597
53.1% of valid votes
Margin
11,657
votes · +15.2 pts
Runner-up
George Vandenberg
Liberal
28,940
37.9% of valid votes
Conservative 53.1% · Liberal 37.9% · New Democratic 5.4% · People's 1.5% · Other 1.3%
Turnout71.7% of 107,133 electors
| Candidate | Party | Votes | % | 2021 | ± |
|---|---|---|---|---|---|
| Marilyn Gladu | Conservative | 40,597 | 53.1% | 46.2% | +6.9 |
| George Vandenberg | Liberal | 28,940 | 37.9% | 19.3% | +18.6 |
| Lo-Anne Chan | New Democratic | 4,088 | 5.4% | 20.9% | −15.5 |
| Brian Everaert | People's | 1,136 | 1.5% | 10.9% | −9.4 |
| Jacques Y Boudreau | Other | 990 | 1.3% | 0.6% | +1.6 |
2 further candidates, each under 1% of the vote
| Mark Lamore | Other | 437 | 0.6% |
| Tony Mitchell | Other | 201 | 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
Swing needed to flip
7.6 pts
Half the margin: the share that would have had to move from first to second.
Third place vs. the margin
4,088 votes
New Democratic took fewer than the 11,657-vote margin.
Election-day polls won by others
35 of 231
2 polls ended in an exact tie.
Flip the seatHypothetical
It would have taken 5,829 voters switching from Conservative to Liberal — 7.6% of the 76,389 valid votes, 7.6 points — to change the result. No ballot was cast this way; this only moves votes between the top two.
Conservative40,597
Liberal28,940
Still Conservative by 11,657 votes. Actual margin: 11,657.
IVElection day versus advance
Only 60.2% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.
Election dayAdvance & specialGap
Conservative55.6%49.5%−6.1
Liberal34.3%43.3%+9.0
New Democratic6.0%4.4%−1.6
Other2.4%1.7%−0.7
People's1.8%1.1%−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 $83,000 — about the same as the median riding's $84,000.highestlowest171st lowest of 343
- Median age is 46.4 — a little higher than the median riding's 41.6.highestlowest59th highest of 343
- Share aged 25-64 with a bachelor's degree or higher is 18.8% — about 67 percent of the median riding's 28.2%.highestlowest78th lowest of 343
- Share who are immigrants is 9.7% — about 56 percent of the median riding's 17.3%.highestlowest111th lowest of 343
- Share of households that own their home is 74.4% — a little higher than the median riding's 71.4%.highestlowest126th highest of 343
- Share with French as a mother tongue is 1.6% — about the same as the median riding's 1.6%.highestlowest165th 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
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The card
No. 35090ON · 2025
Sarnia—Lambton—Bkejwanong
Marilyn Gladu
- Result
- Conservative hold by 11,657
- Turnout
- 71.7%
- Population
- 128,155
- Area
- 4,173 km²
Population, largest firstLength of the ballotArea, 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.
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