Photo: Pymouss · CC BY-SA 4.0Châteauguay’s mayor: Eric Allard
Across Quebec, 44 of the 78 MPs sit with the Liberal Party of Canada. Federally, Châteauguay sits in Châteauguay—Les Jardins-de-Napierville, its riding (a federal electoral district, which elects one MP), held by Nathalie Provost of the Liberal Party of Canada. Provincially, Châteauguay votes in the riding of the same name; the open record doesn’t name its MNA (Member of the National Assembly, Québec’s legislature) in the National Assembly of Québec, so the legislature’s own list is linked below. The city also elects 10 councillors to sit at the council table.
Three governments, and who does what
Châteauguay, a city in Quebec, shares the work with the province and Ottawa.
Local services, by-laws and property tax.
ville.chateauguay.qc.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.
Châteauguay belongs to MRC Roussillon, a regional county municipality, and to the Communauté métropolitaine de Montréal.
From the council table to Ottawa
Every elected tier that speaks for Châteauguay, from the most recent elections.
- 1Châteauguay councilelected November 2025Eric Allard
- 2National Assembly of QuébecChâteauguay
- 3House of CommonsChâteauguay—Les Jardins-de-Napierville
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 Châteauguay council
Everyone elected in 2025, seat by seat, with their team and votes.
- Eric Allard
- Barry Doyle
- Arlene Bryant
- Eric Corbeil
- Lucie Laberge
- Nathalie Marchand
- Marie Louise Kerneis
- Mike Gendron
- François Le Borgne
- Sylvie Castonguay
- Luc Daoust
11 members and how they were elected
| Name | Seat | Team | Votes | Share | On the last council |
|---|---|---|---|---|---|
| Eric Allard | Mayor | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
| Barry Doyle | Jack district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
| Arlene Bryant | Primot district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
| Eric Corbeil | Robutel de la Noüe district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
| Lucie Laberge | Bumbray district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
| Nathalie Marchand | Malette district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | No |
| Marie Louise Kerneis | Salaberry district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
| Mike Gendron | Lang district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
| François Le Borgne | D'Youville district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
| Sylvie Castonguay | Desparois district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | No |
| Luc Daoust | Le Moyne district | Alliance Châteauguay - Équipe Éric Allard Team | – | acclaimed | Yes |
Voters elect a councillor for their own district and a mayor for the whole of Châteauguay. Eric Allard was acclaimed mayor, with no one on the ballot against them. Every member of the council ran for Alliance Châteauguay - Équipe Éric Allard Team.
Councils and results: Résultats des élections municipales générales de 2025, MAMH (CC BY 4.0)
When Châteauguay votes
The last and next general elections at each level; a by-election can come in between.
| Election | Last | Next |
|---|---|---|
| Châteauguay council | 2 November 2025 | 4 November 2029 |
| National Assembly of Québec | 5 October 2026 | – |
| House of Commons | 28 April 2025 | – |
4 November 2029 is the next council election in Châteauguay, fixed by the Act respecting elections and referendums in municipalities for the first Sunday in November every four years. The National Assembly of Québec was last elected on 5 October 2026, and the House of Commons on 28 April 2025. There are no 2025 counts here: Elections Canada’s terms bar their commercial reuse, so 2021 is the latest open result.
Election dates: the legislatures, MMAH and MAMH
Châteauguay votes in the riding of the same name 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 ↗Châteauguay is in the riding of the same name, one of the ridings that each elect a MNA to the National Assembly of Québec.
Québec ridings: Répertoire des municipalités, MAMH (CC BY 4.0)
Nathalie Provost represents Châteauguay—Les Jardins-de-Napierville in Ottawa
Each riding elects one MP to the House of Commons; the general election of 28 April 2025 chose the 45th Parliament.
Châteauguay—Les Jardins-de-Napierville · Liberal Party of Canada
en.wikipedia.org ↗- Liberal Party of Canada44
- Bloc Québécois22
- Conservative Party of Canada11
- New Democratic Party1
As Wikidata records them.
The MP’s record
On today’s boundaries, the 2021 vote in Châteauguay—Les Jardins-de-Napierville would have gone to the Bloc Québécois (37%), so Nathalie Provost’s 2025 win took it from them. Nathalie Provost is new to Parliament, first elected in the April 2025 vote.
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
Châteauguay—Lacolle returned Brenda Shanahan (Liberal Party of Canada) in 2021
The 2019 and 2021 counts in Châteauguay—Lacolle, Châteauguay’s riding before the map was redrawn; it now votes in Châteauguay—Les Jardins-de-Napierville.
No riding in Canada was closer that year, out of 338. Turnout in Châteauguay—Lacolle was 62% in 2021, against 63% nationally. 12 votes separated Brenda Shanahan (Liberal Party of Canada) from Patrick O'Hara (Bloc Québécois) in Châteauguay—Lacolle in 2021, when the winner took 37%. 38% had elected Brenda Shanahan there in 2019.
All 8 candidates in Châteauguay—Lacolle, 2021
| Candidate | Party | Votes | Share |
|---|---|---|---|
| Brenda Shanahan | Liberal Party of Canada | 18,029 | 37.0% |
| Patrick O'Hara | Bloc Québécois | 18,017 | 37.0% |
| Pierre Bournaki | Conservative Party of Canada | 5,538 | 11.4% |
| Hannah Wolker | New Democratic Party | 3,752 | 7.7% |
| Jeff Benoit | People's Party of Canada | 1,821 | 3.7% |
| Frédéric Olivier | Green Party of Canada | 801 | 1.7% |
| André Lafrance | Free Party Canada | 448 | 0.9% |
| Marc Gagnon | Parti pour l'Indépendance du Québec | 277 | 0.6% |
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
Châteauguay 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.
Châteauguay council carried $150.8M of long-term debt, $2,883 per resident against a typical $2,461. Property taxes and payments in lieu brought in 73% of revenue, against 63% across the province’s returns. The largest line is police, fire and protection: 26% of the total, $617 a resident. In 2024 the median among Québec’s local municipalities was $2,394 a resident; Châteauguay council spent $2,362. Staff pay and benefits account for 47% of spending.
Spending per resident nearby
Every service line, 2024
| Service | 2024 | Per resident | Share |
|---|---|---|---|
| Police, fire and protection | $32.3M | $617 | 26% |
| Roads and transit | $28.5M | $545 | 23% |
| Water, sewers and waste | $19.1M | $366 | 15% |
| General government | $17.4M | $332 | 14% |
| Recreation and culture | $16.7M | $319 | 14% |
| Financing costs | $6.1M | $117 | 5% |
| Planning and development | $3.4M | $65 | 3% |
Money: rapport financier and profil financier 2024, ministère des Affaires municipales et de l’Habitation (CC BY 4.0)
One seat for every 4,860 residents
Residents (2021 Census) per council seat, head of council included, beside nearby municipalities; the tick is the provincial median.
Each seat on Châteauguay council answers to 4,860 residents, a higher ratio than 97% of municipalities in Quebec.
Residents: 2021 Census; seats: the province’s council list
Having a say in how Châteauguay 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.
ville.chateauguay.qc.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. Seats count the head of council and the councillors, and residents are the 2021 Census count; a neighbourhood shows its city’s.
- Which riding. The 2021 Census homes of a place’s residents fix its ridings, and one is shown once it holds 5% of them.
- Election results. The 2019 and 2021 figures are Elections Canada’s official counts on the ridings drawn in 2013; the “today’s boundaries” figures are its transposition of the 2021 vote onto the 2023 ridings, an estimate built from polling divisions.
- Not on this page. Band councils, and what members did once elected: the open record stops at the vote.
- Who holds each seat. Wikidata, edited by volunteers, is the source for each MP, and it can trail a change of seat by a little.
Questions about how Châteauguay is run
Who is the MP for Châteauguay?
Nathalie Provost (Liberal Party of Canada) sits for Châteauguay—Les Jardins-de-Napierville, the riding Châteauguay is in.
Which party won Châteauguay in the 2021 federal election?
The Liberal Party of Canada, with Brenda Shanahan in Châteauguay—Lacolle; since 2025 Nathalie Provost represents Châteauguay—Les Jardins-de-Napierville.
Who is the MNA for Châteauguay?
Châteauguay votes in the riding of the same name; the National Assembly of Québec’s members page gives its current MNA.
Who heads the council in Châteauguay?
The mayor is Eric Allard, who chairs Châteauguay council.
How much does Châteauguay council spend?
In 2024, Châteauguay council spent $123.6M in all, for some 52,320 residents, of which $32.3M went on police, fire and protection, the biggest line.
Which regional body is Châteauguay part of?
Its regional county municipality: MRC Roussillon, where Châteauguay’s mayor sits with the other mayors.
How is Châteauguay council elected?
Châteauguay council: the mayor is chosen at large, each councillor by a district.
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).