The Political RecordFederal electoral districtsNo. 35046Ontario

Kingston and the Islands

Kingston et les Îles

Kingston and the Islands is a federal riding in Ontario. Mark Gerretsen (Liberal, first elected to the House in 2015) represents Kingston and the Islands. Mark Gerretsen (Liberal) held Kingston and the Islands for the Liberals in the 2025 election by 25,090 votes (32.6 points), with 63.2% of the vote. Bryan Paterson (Conservative) was second with 30.6%, on a turnout of 71.7% of 108,014 electors. Member as of 2026-11-01.

Fig. 1 — Kingston and the Islands 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 Kingston and the Islands

Mark Gerretsen's piece from the board. Illustration after the official portrait © House of Commons.

Mark Gerretsen

Member of Parliament for Kingston and the Islands

Liberal

MP since 2015-10-19 · 4 terms

Chief government whip
Member of the Board of Internal Economy

283 speeches in the 45th Parliament, most often on Budget 2025 Implementation Act, No. 1.

Contact and office · House of Commons →

The 2025 result: Liberal hold

Share of the valid votes by candidate, Kingston and the Islands, April 28, 2025

Shares of the 76,993 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
Mark Gerretsen	Liberal	48,682	63.2%
Bryan Paterson	Conservative	23,592	30.6%
Daria Juüdi-Hope	New Democratic	3,648	4.7%
Fintan Hartnett	Green	1,071	1.4%

Mark Gerretsen (Liberal) won Kingston and the Islands on April 28, 2025 with 48,682 votes, 63.2% of the 76,993 valid votes. Bryan Paterson (Conservative) was second with 23,592 (30.6%), 25,090 votes and 32.6 points behind.

Of the 76,993 valid votes, Mark Gerretsen (Liberal) took 63.2%, Bryan Paterson (Conservative) 30.6%, Daria Juüdi-Hope (New Democratic) 4.7% and Fintan Hartnett (Green) 1.4%. Turnout was 71.7% of 108,014 electors: 77,425 ballots cast, 76,993 of them valid, for 4 candidates.

Since 2021

Against the 2021 result on these boundaries, the Liberals are up 22.8 (40.4% to 63.2%), the Conservatives up 6.2 (24.4% to 30.6%), the New Democrats down 23.9 (28.6% to 4.7%) and the Greens down 1.0 (2.4% to 1.4%), 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: held by the Liberals

The party first in Kingston and the Islands at each general election, 2004 to 2025, on today's boundaries

2004Liberal52.5%by 29.3 points over the Conservatives
2006Liberal45.9%by 19.8 points over the Conservatives
2008Liberal39.2%by 6.6 points over the Conservatives
2011Liberal39.3%by 4.4 points over the Conservatives
2015Liberal54.1%by 29.8 points over the Conservatives
2019Liberal44.5%by 21.8 points over the New Democrats
2021Liberal40.4%by 11.8 points over the New Democrats
2025Liberal63.2%by 32.6 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	52.5%	Conservative	29.3	carried, our estimate
2006	Liberal	45.9%	Conservative	19.8	carried, our estimate
2008	Liberal	39.2%	Conservative	6.6	carried, our estimate
2011	Liberal	39.3%	Conservative	4.4	carried, our estimate
2015	Liberal	54.1%	Conservative	29.8	carried, our estimate
2019	Liberal	44.5%	New Democratic	21.8	carried, our estimate
2021	Liberal	40.4%	New Democratic	11.8	transposed by Elections Canada
2025	Liberal	63.2%	Conservative	32.6	official result

The Liberals were first here at all eight general elections from 2004 to 2025, by an average of 19.5 points over the next party, short of the 20 a stronghold needs. In 2025 the Liberals took 63.2% of the vote here, 18.1 points above their average of 45.1% at the seven general elections from 2004 to 2021. The Liberals have been first here at every general election since 1988, twelve in a row.

On today's boundaries the Liberals were first here in 2004 (52.5%), 2006 (45.9%), 2008 (39.2%), 2011 (39.3%), 2015 (54.1%), 2019 (44.5%), 2021 (40.4%) and 2025 (63.2%), 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 23 of the 343 ridings are held without being 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 · Mark Gerretsen, by 7,949 votes (11.8 pts)
2019 Liberal · Mark Gerretsen, by 15,349 votes (22.5 pts)
2015 Liberal · Mark Gerretsen, by 21,493 votes (32.7 pts)

In the old Kingston and the Islands on the 2013 boundaries, the riding most of the 2025 electors in today's Kingston and the Islands lived in; Elections Canada's official results.

What kind of place Kingston and the Islands is

Population: 134,4152021 census
Area: 981km²
Density: 137people per km²
Electors: 108,014on the 2025 lists

Distinctions · ranked against all 343 ridings

Most populous in Canada
134,415 people, 2021 census · 1st of 343

Share of households that own their home is 56.4% — about 79 percent of the median riding's 71.4%.
highestlowest71st lowest of 343
Share with French as a mother tongue is 3.1% — about 1.9 times the median riding's 1.6%.
highestlowest116th highest of 343
Share aged 25-64 with a bachelor's degree or higher is 36.5% — about 1.3 times the median riding's 28.2%.
highestlowest121st highest of 343
Median total household income is $79,000 — a little lower than the median riding's $84,000.
highestlowest136th lowest of 343
Share who are immigrants is 13.5% — about 78 percent of the median riding's 17.3%.
highestlowest149th lowest of 343
Median age is 41.6 — about the same as the median riding's 41.6.
highestlowest163rd 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. 94% of the 2025 electors in today's Kingston and the Islands lived in the old Kingston and the Islands; by area, 31% of the riding came from other ridings.

Share of today's electorsFormer riding

93.8%Kingston and the Islands 69.5% of the area

6.2%Lanark—Frontenac—Kingston 30.5% of the area · 4% 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	±
Mark Gerretsen	Liberal	48,682	63.2%	40.4%	+22.8
Bryan Paterson	Conservative	23,592	30.6%	24.4%	+6.2
Daria Juüdi-Hope	New Democratic	3,648	4.7%	28.6%	−23.9
Fintan Hartnett	Green	1,071	1.4%	2.4%	−1.0

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

3,648 votes

New Democratic took fewer than the 25,090-vote margin.

Election-day polls won by others

19 of 249

3 polls ended in an exact tie.

Fig. 2 — Each square is one election-day poll: ■ won by the Liberals (227) · ■ won by another party (19) · ▨ tied (3).

Flip the seatHypothetical

It would have taken 12,546 voters switching from Liberal to Conservative — 16.3% of the 76,993 valid votes, 16.3 points — to change the result. No ballot was cast this way; this only moves votes between the top two.

Voters who switch: 0025,092

Liberal48,682

Conservative23,592

Still Liberal by 25,090 votes. Actual margin: 25,090.

IVElection day versus advance

Only 52.4% of this riding's votes were cast at election-day polls. The rest were advance or special ballots.

On election day the Liberals took 58.5%, the Conservatives 34.2%, the New Democrats 5.5% and the Greens 1.8%; in advance and special ballots, 68.5%, 26.7%, 3.9% and 0.9%, in that order.

Share of the valid votes by party, election-day polls against advance and special ballots, Kingston and the Islands, 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	58.5%	68.5%	+10.0
Conservative	34.2%	26.7%	−7.5
New Democratic	5.5%	3.9%	−1.6
Green	1.8%	0.9%	−0.9

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 — Kingston and the Islands and its 4 neighbouring ridings.

Sources and citation

"Kingston and the Islands — federal riding profile and 2025 results."
The Political Record. https://politicalrecord.ca/riding/kingston-and-the-islands/
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.