Photo: Veillg1 · CC BY-SA 4.0Argenteuil—La Petite-Nation came down to 1,529 votes in 2021, closer than 94% of the country’s ridings
Grenville’s council has 6 councillors and is led by Pierre Thauvette, the mayor. For federal votes, Grenville belongs to Argenteuil—La Petite-Nation, its riding (a federal electoral district, which elects one MP); Stéphane Lauzon (Liberal Party of Canada) holds it. Argenteuil is the riding Grenville votes in for the National Assembly of Québec, and its MNA (Member of the National Assembly, Québec’s legislature) isn’t named here because no open list records the members.
What stands out in how Grenville is governed
A close federal race
With 3 points between the winner and the runner-up (Bloc Québécois), Argenteuil—La Petite-Nation beat 94% of the 338 ridings for closeness in 2021. How Grenville has voted ↓
Low federal turnout
Federal turnout in Argenteuil—La Petite-Nation trailed 66% of Canada’s ridings in 2021. The 2021 turnout ↓
Compared with the province’s municipalities of 1,000+ residents (2021 Census; MAMH, MMAH and Statistics Canada).
Three governments, and who does what
Grenville, a village in Quebec, shares the work with the province and Ottawa.
Local services, by-laws and property tax.
grenville.ca ↗Land-use, waste and fire-cover plans.
Schools, health care, highways, municipal law.
assnat.qc.ca ↗Passports, pensions, EI, defence, immigration.
ourcommons.ca ↗Who to ask
Green: municipal. Gold: provincial. Grey: federal.
Its regional county municipality is MRC Argenteuil: the mayors of its municipalities, Grenville’s among them, sit on its council.
From the council table to Ottawa
Every elected tier that speaks for Grenville, from the most recent elections.
- 1Grenville councilelected November 2025Pierre Thauvette
- 2National Assembly of QuébecArgenteuil
- 3House of CommonsArgenteuil—La Petite-Nation
Party colours are neutral on purpose: they tell parties apart and aren’t the parties’ own. MPs: Wikidata (CC0), 45th Parliament statements, read 7 November 2026; ridings: 2023 Representation Order, Statistics Canada
Who sits on Grenville council
Everyone elected in 2025, seat by seat, with their team and votes.
- Pierre Thauvette
- André Lemay
- André Woodbury
- Louis André Desjardins
- Peter Dopelhamer
- Roger Lalonde
- Jocelyne Louis-Seize
7 members and how they were elected
| Name | Seat | Team | Votes | Share | On the last council |
|---|---|---|---|---|---|
| Pierre Thauvette | Mayor | Independent | 359 | 51% | Yes |
| André Lemay | Councillor | Independent | – | acclaimed | Yes |
| André Woodbury | Councillor | Independent | 482 | 69% | Yes |
| Louis André Desjardins | Councillor | Independent | – | acclaimed | Yes |
| Peter Dopelhamer | Councillor | Independent | 440 | 64% | Yes |
| Roger Lalonde | Councillor | Independent | – | acclaimed | Yes |
| Jocelyne Louis-Seize | Councillor | Independent | – | acclaimed | Yes |
All the seats on Grenville council went to candidates with no team. Voters across the municipality choose the mayor and every councillor on Grenville council alike. The voters returned every sitting member.
Every other candidate (3)
| Seat | Candidate | Team | Votes | Share |
|---|---|---|---|---|
| Mayor | Sarah Lacasse Dwyer | Independent | 347 | 49% |
| Councillor | David Patrick Massie | Independent | 217 | 31% |
| Councillor | Gaétan (Pirate) Carrière | Independent | 250 | 36% |
Councils and results: Résultats des élections municipales générales de 2025, MAMH (CC BY 4.0)
The 2025 race for mayor of Grenville
Votes for each candidate for mayor in 2025.
Fewer electors voted for mayor than in most of Québec: 48%, where the median contested race drew 51%. The race for mayor went to Pierre Thauvette with 51%, a lead of 12 over Sarah Lacasse Dwyer. The outgoing mayor, Pierre Thauvette, was re-elected.
How Grenville voted: same source as Councillors, above.
When Grenville votes
The last and next general elections at each level; a by-election can come in between.
| Election | Last | Next |
|---|---|---|
| Grenville council | 2 November 2025 | 4 November 2029 |
| National Assembly of Québec | 5 October 2026 | – |
| House of Commons | 28 April 2025 | – |
The next council election in Grenville falls on 4 November 2029, the first Sunday in November every four years under the Act respecting elections and referendums in municipalities. Voters last chose the National Assembly of Québec on 5 October 2026 and the House of Commons on 28 April 2025. The 2025 results are left out because elections.ca’s terms forbid commercial reproduction; the open catalogue’s latest is 2021.
Election dates: the legislatures, MMAH and MAMH
Grenville votes in Argenteuil for the National Assembly of Québec
Provinces and territories run schools, health care and municipal law; each riding elects one MNA.
MNA: see the legislature’s list
assnat.qc.ca ↗Argenteuil takes in Grenville and elects its MNA to the National Assembly of Québec.
Québec ridings: Répertoire des municipalités, MAMH (CC BY 4.0)
Stéphane Lauzon represents Argenteuil—La Petite-Nation in Ottawa
Each riding elects one MP to the House of Commons; the general election of 28 April 2025 chose the 45th Parliament.
Argenteuil—La Petite-Nation · Liberal Party of Canada · first elected 2015
en.wikipedia.org ↗- Liberal Party of Canada44
- Bloc Québécois22
- Conservative Party of Canada11
- New Democratic Party1
As Wikidata records them.
Of the 78 MPs from Quebec, 44 are with the Liberal Party of Canada, Stéphane Lauzon among them.
The MP’s record
Stéphane Lauzon sat on Gatineau city council before coming to Ottawa. Had the 2021 ballots been cast in today’s Argenteuil—La Petite-Nation, the Liberal Party of Canada would have led with 39%; Stéphane Lauzon held it for them in 2025. Stéphane Lauzon was first elected in 2015; the current Parliament is Stéphane Lauzon’s 4th.
MPs: Wikidata (CC0), 45th Parliament statements, read 7 November 2026; ridings: 2023 Representation Order, Statistics Canada · MPs’ records: Wikidata (CC0), positions held and party memberships, read 8 November 2026
Stéphane Lauzon kept Argenteuil—La Petite-Nation for the Liberal Party of Canada in 2021
Results in Argenteuil—La Petite-Nation as drawn in 2013, the boundaries of the 2019 and 2021 elections; the riding was redrawn for 2025.
Stéphane Lauzon (Liberal Party of Canada) took Argenteuil—La Petite-Nation in 2021 with 38% of the vote, 1,529 votes ahead of Yves Destroismaisons (Bloc Québécois). Back in 2019, Stéphane Lauzon took the riding on 38%.
All 6 candidates in Argenteuil—La Petite-Nation, 2021
| Candidate | Party | Votes | Share |
|---|---|---|---|
| Stéphane Lauzon | Liberal Party of Canada | 19,371 | 38.3% |
| Yves Destroismaisons | Bloc Québécois | 17,842 | 35.3% |
| Marie Louis-Seize | Conservative Party of Canada | 6,547 | 12.9% |
| Michel Welt | New Democratic Party | 3,390 | 6.7% |
| Marc Vachon | People's Party of Canada | 2,777 | 5.5% |
| Paul Lynes | Free Party Canada | 686 | 1.4% |
Federal results: Elections Canada, 43rd and 44th general elections and the 44th’s transposition to the 2023 ridings, via open.canada.ca. Contains information licensed under the Open Government Licence – Canada
Grenville council spends less per resident than most
The 2024 financial return: spending by service and revenue by source, per resident, compared only with Québec’s local municipalities.
Spending per resident by service, 2024
What pays for it
Shares of revenue, town and province.
Long-term debt at Grenville council stood at $3.2M, or $1,722 a resident, below the $2,461 median. At 75%, property taxes count for more of the revenue than the 63% seen across the province. At 21% of spending ($467 a resident), general government leads the budget. Salaries and benefits took 35% of the total. Each resident’s share of Grenville council’s 2024 spending came to $2,242, where the middle of Québec’s local municipalities sat at $2,394.
Spending per resident nearby
Every service line, 2024
| Service | 2024 | Per resident | Share |
|---|---|---|---|
| General government | $878K | $467 | 21% |
| Roads and transit | $873K | $465 | 21% |
| Water, sewers and waste | $865K | $460 | 21% |
| Recreation and culture | $592K | $315 | 14% |
| Police, fire and protection | $474K | $252 | 11% |
| Planning and development | $376K | $200 | 9% |
| Financing costs | $141K | $75 | 3% |
| Social services and child care | $13K | $7 | 0% |
Money: rapport financier and profil financier 2024, ministère des Affaires municipales et de l’Habitation (CC BY 4.0)
One seat for every 270 residents
Residents (2021 Census) per council seat, head of council included, beside nearby municipalities; the tick is the provincial median.
64% of municipalities in Quebec have more residents per seat than Grenville council, at 270 each.
Residents: 2021 Census; seats: the province’s council list
Having a say in how Grenville is run
Check or update the federal list.
elections.ca ↗Every MP lists an office.
ourcommons.ca ↗Ridings, registration and voting dates.
electionsquebec.qc.ca ↗Council meetings, agendas and services.
grenville.ca ↗What this data can and can’t tell you
- Council money. Spending by service comes from MAMH’s consolidated 2024 financial report, revenue, debt and reserves from its financial profile, all per resident on MAMH’s population.
- Council size. The 2021 Census population is shared over all council seats, including the head of council’s, for this ratio.
- Which riding. Ridings are assigned from the 2021 Census: the one with most residents first, then any holding 5% or more.
- Election results. Elections Canada redrew the ridings in 2023 and re-tallied the 2021 ballots onto the new map from polling divisions; that estimate, and the official 2019 and 2021 counts on the old map, are what you see.
- Not on this page. The open files end at election night: no council votes since, and no band councils.
- Who holds each seat. Who holds each seat is read from Wikidata, so a very recent change in the Commons may not appear yet.
Questions about how Grenville is run
Who is the MP for Grenville?
Stéphane Lauzon (Liberal Party of Canada) sits for Argenteuil—La Petite-Nation, the riding Grenville is in.
Which party won Grenville in the 2021 federal election?
In 2021 it was Stéphane Lauzon (Liberal Party of Canada), who represents Argenteuil—La Petite-Nation still.
Who is the MNA for Grenville?
The riding for Grenville is Argenteuil, and the National Assembly of Québec lists the MNA who holds it.
Who heads the council in Grenville?
Pierre Thauvette is mayor, at the head of Grenville council.
How much does Grenville council spend?
The 2024 return of Grenville council shows $4.2M of spending for roughly 1,879 residents, $878K of it on general government.
Which regional body is Grenville part of?
Grenville belongs to MRC Argenteuil, a regional county municipality whose council is made up of its municipalities’ mayors.
How is Grenville council elected?
At large: every voter helps fill all of Grenville council, the mayor too.
Sources: MPs: Wikidata (CC0), 45th Parliament statements, read 7 November 2026; ridings: 2023 Representation Order, Statistics Canada · Québec ridings: Répertoire des municipalités, MAMH (CC BY 4.0) · Councils: Répertoire des municipalités du Québec, MAMH (CC BY 4.0) · Money: rapport financier and profil financier 2024, ministère des Affaires municipales et de l’Habitation (CC BY 4.0) · Councils and results: Résultats des élections municipales générales de 2025, MAMH (CC BY 4.0) · Next municipal election: the province’s municipal election act · Municipality types: Statistics Canada census subdivisions · Federal results: Elections Canada, 43rd and 44th general elections and the 44th’s transposition to the 2023 ridings, via open.canada.ca. Contains information licensed under the Open Government Licence – Canada · MPs’ records: Wikidata (CC0), positions held and party memberships, read 8 November 2026. Under the Statistics Canada Open Licence.
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).