In Châtonnay, turnout beat 83% of compared French communes
Jean-Michel Nogueras has been mayor of Châtonnay since March 20, 2026, elected by the 19 members of the municipal council. At the March 2026 municipal elections, Unis pour Châtonnay won 17 of the 19 seats in the first round on March 15, 2026, with 76.3% of the votes. Châtonnay is part of the Communauté de communes Bièvre Isère.
March 2032
Councils are elected for six years; the council elects the mayor.
Register to vote ↗Throughout this page, the median in Isère and the France median are the median of compared communes (those with an overall grade), each figure its own median. Châtonnay has 2,009 residents; every compared commune has 2,507 or more, so read its place among them with that in mind.
What stands out about Châtonnay’s town hall
Won in the first round
Unis pour Châtonnay won 76.3% of the votes on March 15, 2026, more than half, so there was no second round; 2 lists stood. It took 17 of the 19 seats: half the seats as the list ahead, and its share of the rest. The other lists share the remaining 2. Who’s in charge ↓
Turnout above most communes
64.5% of registered voters in Châtonnay voted on March 15, 2026: higher than in 83% of compared French communes. The median of compared communes in Isère was 54.9%; across France, 57.4%. 2026 elections ↓
Less debt per resident than most
Châtonnay owed €742K at the end of 2025, €372 per resident: lower than in 81% of compared French communes (France median €748). That equals 59% of a year’s running costs. The commune’s money ↓
Little investment
Châtonnay invested €249 per resident (buildings, roads, equipment), 29% of its spending: lower than in 77% of compared French communes (France median €403). Investment swings from year to year with projects. The commune’s money ↓
Results as the Interior ministry published them; accounts from the DGFiP via OFGL. Nothing here is graded.
The council the voters chose
Seats as the March 2026 results gave them, one dot a seat.
- Unis pour Châtonnay172 community seats
- Ensemble pour l'avenir de Châtonnay20 community seats
As elected in the first round, March 15, 2026.
The list that comes first gets half the seats; the rest are shared in proportion among the lists with 5% or more, the winner included. So the winning list always has a majority. The same vote gave Châtonnay 2 seats on the council of the Communauté de communes Bièvre Isère (community seats).
Source: Interior ministry, 2026 municipal election results (March 15 and 22), subject to corrections and appeals.
4 authorities share the work
The commune is the tier closest to residents; the intercommunality, the département and the région do the rest.
Births, marriages and deaths, the electoral roll, nursery and primary schools, local roads, planning permission, the municipal police, and what else the council takes on.
Mayor: Jean-Michel Nogueras · 19 councilors
The services its communes share: usually waste collection, economic development and planning documents; often water and local buses.
Social aid (RSA, care for older and disabled people, child protection), collèges, the département’s roads, and funding for fire and rescue.
Lycées, regional trains (TER) and coaches, economic development and job training.
Who to ask
The usual split of powers (service-public.fr); an intercommunality’s exact remit varies, so check its website for waste, water and buses.
Membership: COG 2026 (INSEE); intercommunality type: BANATIC, January 2025. What each tier does: service-public.fr.
From the mayor to the intercommunality
The officials as the Interior ministry’s register lists them, and the council by list.
- 1Mayorsince March 20, 2026Jean-Michel Nogueras
- 2Deputy mayors5 adjoints, elected by the councilSonia ColombYvan ServetJocelyne SerranoSerge AkninCorinne Ziemianczyk
- 3Châtonnay municipal council19 seats by listUnis pour Châtonnay 17 · Ensemble pour l'avenir de Châtonnay 2
- 4Communauté de communes Bièvre IsèreChâtonnay holds 2 seatsCommunity councilors are drawn from the council lists in the same vote.
Source: Interior ministry, national register of elected officials (RNE), August 11, 2026.
The 19 members of the Châtonnay municipal council
The mayor and 5 deputy mayors first, then the councilors.
| Name | Office | Since |
|---|---|---|
| Jean-Michel Nogueras | Maire | March 20, 2026 |
| Sonia Colomb | 1er adjoint au Maire | March 20, 2026 |
| Yvan Servet | 2ème adjoint au Maire | March 20, 2026 |
| Jocelyne Serrano | 3ème adjoint au Maire | March 20, 2026 |
| Serge Aknin | 4ème adjoint au Maire | March 20, 2026 |
| Corinne Ziemianczyk | 5ème adjoint au Maire | March 20, 2026 |
Show the full council (19)
| Name | Office | Since |
|---|---|---|
| Jean-Michel Nogueras | Maire | March 20, 2026 |
| Sonia Colomb | 1er adjoint au Maire | March 20, 2026 |
| Yvan Servet | 2ème adjoint au Maire | March 20, 2026 |
| Jocelyne Serrano | 3ème adjoint au Maire | March 20, 2026 |
| Serge Aknin | 4ème adjoint au Maire | March 20, 2026 |
| Corinne Ziemianczyk | 5ème adjoint au Maire | March 20, 2026 |
| Camille Aymerich | Conseiller municipal | March 15, 2026 |
| Jean-Claude Antoine Baty | Conseiller municipal | March 15, 2026 |
| Gaëlle Berthier | Conseiller municipal | March 15, 2026 |
| Sébastien Bidaud | Conseiller municipal | March 15, 2026 |
| Sebastien Gérald Brouchoud | Conseiller municipal | March 15, 2026 |
| Claire Combroux | Conseiller municipal | March 15, 2026 |
| Sophia Curial | Conseiller municipal | March 15, 2026 |
| Jean-Yves Dumoux | Conseiller municipal | June 18, 2026 |
| Jean Gelineau | Conseiller municipal | March 15, 2026 |
| Gérald Gonnon | Conseiller municipal | March 15, 2026 |
| Laurent Guillot | Conseiller municipal | March 15, 2026 |
| Isabelle Rebillard | Conseiller municipal | March 15, 2026 |
| Christiane Revellin | Conseiller municipal | March 15, 2026 |
Names and offices as the Interior ministry’s national register of elected officials (RNE) published them on August 11, 2026, written as it writes them. Public role only. Later resignations and replacements aren’t shown.
The council: same source as Who represents Châtonnay, above.
How Châtonnay voted in March 2026
2 lists stood; one won more than half the votes in the first round.
942 votes cast for a list
962 of 1,492 registered voters in Châtonnay voted.
10 blank and 10 spoilt ballots, not counted in the shares.
Turnout, first round · March 15, 2026
Shares are of the votes cast for a list, leaving out blank and spoilt ballots. Lists in vote order; the colors only tell the lists apart.
2026 elections: same source as Who’s in charge, above.
Châtonnay spends €875 per resident a year
The commune’s consolidated accounts: main and annexed budgets, transfers between them removed.
Per resident, 2025 · against compared communes
Spending and debt per resident, 2018 to 2025
Châtonnay owed €742K at the end of 2025, €372 per resident, lower than in 81% of compared French communes, equal to 59% of a year’s running costs.
Show year by year
| Year | Spending | Investment | Debt | Debt in all |
|---|---|---|---|---|
| 2025 | €875 | €249 | €372 | €742K |
| 2024 | €1,212 | €558 | €528 | €1.1M |
| 2023 | €1,670 | €1,100 | €679 | €1.4M |
| 2022 | €994 | €447 | €121 | €249K |
| 2021 | €670 | €142 | €137 | €287K |
| 2020 | €778 | €279 | €153 | €323K |
| 2019 | €744 | €192 | €168 | €359K |
| 2018 | €546 | €102 | €198 | €417K |
Source: OFGL, consolidated commune accounts 2018–2025 (DGFiP); 2025 provisional.
The 12th lowest debt per resident of 41 communes its size
The 40 compared communes nearest in population, debt per resident at the end of 2025.
Lowest: Watten, €1. Highest: Mers-les-Bains, €3,228.
Have a say in Châtonnay
French citizens register online or at the town hall; citizens of other EU countries can vote in municipal elections too.
service-public.fr ↗See where you’re registered and which polling station is yours.
service-public.fr ↗Council meetings are public; the agenda and minutes are posted at the town hall and usually on its website.
service-public.fr ↗Opening hours, address and phone number of the mairie of Châtonnay in the public services directory.
lannuaire.service-public.fr ↗Who can stand, how lists are formed and the deadlines, from the Interior ministry.
interieur.gouv.fr ↗What this data can and can’t tell you
- Mayors and councilors. From the Interior ministry’s national register of elected officials (RNE) as published on August 11, 2026: name, office and start dates, nothing else. The register counts a mayor as a councilor too; the page counts each person once. It isn’t a live roll: resignations and replacements after that date aren’t shown, and no party is inferred for any official.
- How the council is elected. Since March 2026 every commune elects its council from lists (a 2025 law extended list voting to communes under 1,000). A list with more than half the votes in the first round wins; otherwise lists with 10% or more can go on to a second round, where the list ahead wins. It gets half the seats, and the rest are shared in proportion among lists with 5% or more. The council then elects the mayor and the deputy mayors.
- The label beside a list. The political nuance the prefecture gave the list for the ministry’s results (Divers droite, Union de la gauche…), shown as published. It isn’t the list’s own description; many lists, most in small communes, have none.
- The commune’s money. OFGL’s consolidated accounts from the DGFiP, 2018 to 2025; 2025 is provisional. Spending and investment leave out loan repayments; running costs are part of spending. Debt is what was owed at the end of the year.
- Per resident. Divided by the DGFiP’s population for that year (population totale, which counts some people, such as boarding students, in two communes), so it can differ from the census figure elsewhere on the site.
- The medians. Beside the town’s figure, the median of compared communes in its département and in France (those with an overall grade). A commune’s spending follows its size and its role: one that runs a pool or a theater for the villages around it spends more per resident.
Questions about Châtonnay’s town hall
Who is the mayor of Châtonnay?
Jean-Michel Nogueras, mayor since March 20, 2026, according to the Interior ministry’s register of elected officials (August 11, 2026).
How many councilors does Châtonnay have?
The Châtonnay municipal council has 19 members, the mayor and 5 deputy mayors included.
Who won the 2026 municipal elections in Châtonnay?
Unis pour Châtonnay, in the first round on March 15, 2026, with 76.3% of the votes; it holds 17 of the 19 seats.
What was the turnout in Châtonnay?
64.5% of registered voters voted in the first round on March 15, 2026; the median of compared French communes was 57.4%.
When are the next municipal elections in Châtonnay?
Councils are elected for six years, so the next general municipal elections are due in March 2032. A council can be re-elected sooner if it loses too many members.
How much debt does Châtonnay have?
€742K at the end of 2025, €372 per resident; the median of compared French communes was €748.
Which intercommunality is Châtonnay part of?
Châtonnay is part of the Communauté de communes Bièvre Isère, which runs the services its communes share.
Sources: Interior ministry RNE, August 11, 2026 · Interior ministry, municipal results 2026 · OFGL consolidated commune accounts 2018–2025 · INSEE COG 2026 and BANATIC (January 2025) for the intercommunality. Under the Licence Ouverte / Open Licence 2.0 (Etalab).
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.