How is Chantilly run?
Bénédicte de Cacqueray has been mayor of Chantilly since March 27, 2026, elected by the 33 members of the municipal council. At the March 2026 municipal elections, CAP CHANTILLY won 28 of the 33 seats in the second round on March 22, 2026, with 67.9% of the votes. Chantilly is part of the Communauté de communes de l'Aire Cantilienne.
March 2032
Councils are elected for six years; the council elects the mayor.
Register to vote ↗Throughout this page, the median in Oise and the France median are the median of compared communes (those with an overall grade), each figure its own median.
The council the voters chose
Seats as the March 2026 results gave them, one dot a seat.
- CAP CHANTILLY287 community seats
- Chantilly pour la vie51 community seat
As elected in the second round, March 22, 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 Chantilly 8 seats on the council of the Communauté de communes de l'Aire Cantilienne (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: Bénédicte de Cacqueray · 33 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 27, 2026Bénédicte de Cacqueray
- 2Deputy mayors8 adjoints, elected by the councilMartine TexierSébastien Flet ReitzCaroline GodardLaurent GibaudMarie-Mechtilde MahieuVincent Cappe de BaillonIsabelle ChassagnardOlivier Tourte
- 3Chantilly municipal council33 seats by listCAP CHANTILLY 28 · Chantilly pour la vie 5
- 4Communauté de communes de l'Aire CantilienneChantilly holds 8 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 33 members of the Chantilly municipal council
The mayor and 8 deputy mayors first, then the councilors.
| Name | Office | Since |
|---|---|---|
| Bénédicte de Cacqueray | Maire | March 27, 2026 |
| Martine Texier | 1er adjoint au Maire | March 27, 2026 |
| Sébastien Flet Reitz | 2ème adjoint au Maire | March 27, 2026 |
| Caroline Godard | 3ème adjoint au Maire | March 27, 2026 |
| Laurent Gibaud | 4ème adjoint au Maire | March 27, 2026 |
| Marie-Mechtilde Mahieu | 5ème adjoint au Maire | March 27, 2026 |
| Vincent Cappe de Baillon | 6ème adjoint au Maire | March 27, 2026 |
| Isabelle Chassagnard | 7ème adjoint au Maire | March 27, 2026 |
| Olivier Tourte | 8ème adjoint au Maire | March 27, 2026 |
Show the full council (33)
| Name | Office | Since |
|---|---|---|
| Bénédicte de Cacqueray | Maire | March 27, 2026 |
| Martine Texier | 1er adjoint au Maire | March 27, 2026 |
| Sébastien Flet Reitz | 2ème adjoint au Maire | March 27, 2026 |
| Caroline Godard | 3ème adjoint au Maire | March 27, 2026 |
| Laurent Gibaud | 4ème adjoint au Maire | March 27, 2026 |
| Marie-Mechtilde Mahieu | 5ème adjoint au Maire | March 27, 2026 |
| Vincent Cappe de Baillon | 6ème adjoint au Maire | March 27, 2026 |
| Isabelle Chassagnard | 7ème adjoint au Maire | March 27, 2026 |
| Olivier Tourte | 8ème adjoint au Maire | March 27, 2026 |
| Franck Barreau | Conseiller municipal | March 22, 2026 |
| Juliette Bissière | Conseiller municipal | March 22, 2026 |
| Ilaria Nationalité Italienne Botti | Conseiller municipal | March 22, 2026 |
| Victor Cabili | Conseiller municipal | March 22, 2026 |
| Véronique Cavrois | Conseiller municipal | March 22, 2026 |
| Nicolas Changenet | Conseiller municipal | March 22, 2026 |
| Vincent Charpentier | Conseiller municipal | March 22, 2026 |
| Victoria Clement | Conseiller municipal | March 22, 2026 |
| Benoît Dupont | Conseiller municipal | March 22, 2026 |
| Laura Gluck | Conseiller municipal | March 22, 2026 |
| Dimitri Gritzalis | Conseiller municipal | March 22, 2026 |
| Jean-François Hullo | Conseiller municipal | March 22, 2026 |
| Inès Marie Lanceraux | Conseiller municipal | March 22, 2026 |
| Joseph Lecamus | Conseiller municipal | March 22, 2026 |
| Gérard Lorenzi | Conseiller municipal | March 22, 2026 |
| Carole Mabondzot | Conseiller municipal | March 22, 2026 |
| Héloïse Maindiaux | Conseiller municipal | March 22, 2026 |
| Pauline Morel d'Arleux | Conseiller municipal | March 22, 2026 |
| Théo Poncelet | Conseiller municipal | March 22, 2026 |
| Auriane Sacoman | Conseiller municipal | March 22, 2026 |
| Frédéric Servelle | Conseiller municipal | March 22, 2026 |
| Nicole Vacher | Conseiller municipal | March 22, 2026 |
| Jean-Charles Vuillemot | Conseiller municipal | March 22, 2026 |
| Florence Woerth | Conseiller municipal | March 22, 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 Chantilly, above.
How Chantilly voted in March 2026
3 lists stood in the first round; none won half the votes, so a second round followed.
3,718 votes cast for a list
3,864 of 7,474 registered voters in Chantilly voted.
97 blank and 49 spoilt ballots, not counted in the shares.
3,889 votes cast for a list · no seats given out: a second round followed
4,053 of 7,471 registered voters in Chantilly voted.
126 blank and 38 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.
Chantilly spends €1,594 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
Chantilly owed €8.2M at the end of 2025, €749 per resident, higher than in 50% of compared French communes, equal to 57% of a year’s running costs.
Show year by year
| Year | Spending | Investment | Debt | Debt in all |
|---|---|---|---|---|
| 2025 | €1,594 | €285 | €749 | €8.2M |
| 2024 | €1,876 | €532 | €614 | €6.7M |
| 2023 | €1,600 | €304 | €743 | €8M |
| 2022 | €1,460 | €289 | €851 | €9.5M |
| 2021 | €1,482 | €315 | €975 | €11M |
| 2020 | €1,454 | €315 | €773 | €8.6M |
| 2019 | €1,612 | €413 | €886 | €9.8M |
| 2018 | €1,426 | €286 | €902 | €10M |
Source: OFGL, consolidated commune accounts 2018–2025 (DGFiP); 2025 provisional.
The 18th highest debt per resident of 41 communes its size
The 40 compared communes nearest in population, debt per resident at the end of 2025.
Lowest: Villers-Cotterêts, €0. Highest: Argelès-sur-Mer, €3,715.
Have a say in Chantilly
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 Chantilly 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 Chantilly’s town hall
Who is the mayor of Chantilly?
Bénédicte de Cacqueray, mayor since March 27, 2026, according to the Interior ministry’s register of elected officials (August 11, 2026).
How many councilors does Chantilly have?
The Chantilly municipal council has 33 members, the mayor and 8 deputy mayors included.
Who won the 2026 municipal elections in Chantilly?
CAP CHANTILLY, in the second round on March 22, 2026, with 67.9% of the votes; it holds 28 of the 33 seats.
What was the turnout in Chantilly?
54.3% 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 Chantilly?
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 Chantilly have?
€8.2M at the end of 2025, €749 per resident; the median of compared French communes was €748.
Which intercommunality is Chantilly part of?
Chantilly is part of the Communauté de communes de l'Aire Cantilienne, 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.