Photo: Damien94 & Ben · Public domainCachan invested less per resident in 2025 than 83% of compared communes
Hélène de Comarmond has been mayor of Cachan since March 15, 2026, elected by the 39 members of the municipal council. At the March 2026 municipal elections, Cachan en commun 2026 avec Hélène de COMARMOND won 33 of the 39 seats in the first round on March 15, 2026, with 64.4% of the votes. Cachan is part of the Métropole du Grand Paris.
March 2032
Councils are elected for six years; the council elects the mayor.
Register to vote ↗Throughout this page, the median in Val-de-Marne and the France median are the median of compared communes (those with an overall grade), each figure its own median.
What stands out about Cachan’s town hall
Won in the first round
Cachan en commun 2026 avec Hélène de COMARMOND won 64.4% of the votes on March 15, 2026, more than half, so there was no second round; 3 lists stood. It took 33 of the 39 seats: half the seats as the list ahead, and its share of the rest. The other lists share the remaining 6. Who’s in charge ↓
Turnout below most communes
49.9% of registered voters in Cachan voted on March 15, 2026: lower than in 78% of compared French communes. The median of compared communes in Val-de-Marne was 50.9%; across France, 57.4%. 2026 elections ↓
More debt per resident than most
Cachan owed €38.5M at the end of 2025, €1,251 per resident: higher than in 80% of compared French communes (France median €748). That equals 83% of a year’s running costs. The commune’s money ↓
Little investment
Cachan invested €216 per resident (buildings, roads, equipment), 12% of its spending: lower than in 83% 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.
- Cachan en commun 2026 avec Hélène de COMARMOND331 community seat
- Avec le Dr Sébastien TROUILLAS, Cachan sûre, propre, écologique et dynamique !40 community seats
- En Avant Cachan20 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 Cachan 1 seat on the council of the Métropole du Grand Paris (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: Hélène de Comarmond · 39 councilors
Housing and planning strategy for Greater Paris, economic development, flood prevention and the low-emission zone. Waste and water sit with the territorial bodies (EPT) and the City of Paris.
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 15, 2026Hélène de Comarmond
- 2Deputy mayors14 adjoints, elected by the councilCamille VielhescazeSandrine ChuraquiDavid PetiotZeïma Morin-YahayaPatrick SalernoNarguesse NazerSamuel BesnardMaëlle Bouglet+6 more
- 3Cachan municipal council39 seats by listCachan en commun 2026 avec Hélène de COMARMOND 33 · Avec le Dr Sébastien TROUILLAS, Cachan sûre, propre, écologique et dynamique ! 4 · En Avant Cachan 2
- 4Métropole du Grand ParisCachan holds 1 seatCommunity councilors are drawn from the council lists in the same vote.
Source: Interior ministry, national register of elected officials (RNE), August 11, 2026.
The 39 members of the Cachan municipal council
The mayor and 14 deputy mayors first, then the councilors.
| Name | Office | Since |
|---|---|---|
| Hélène de Comarmond | Maire | March 15, 2026 |
| Camille Vielhescaze | 1er adjoint au Maire | March 15, 2026 |
| Sandrine Churaqui | 2ème adjoint au Maire | March 15, 2026 |
| David Petiot | 3ème adjoint au Maire | March 15, 2026 |
| Zeïma Morin-Yahaya | 4ème adjoint au Maire | March 15, 2026 |
| Patrick Salerno | 5ème adjoint au Maire | March 15, 2026 |
| Narguesse Nazer | 6ème adjoint au Maire | March 15, 2026 |
| Samuel Besnard | 7ème adjoint au Maire | March 15, 2026 |
| Maëlle Bouglet | 8ème adjoint au Maire | March 15, 2026 |
| Stéphane Rabuel | 9ème adjoint au Maire | March 15, 2026 |
| Céline Di Mercurio | 10ème adjoint au Maire | March 15, 2026 |
| Thomas Kekenbosch | 11ème adjoint au Maire | March 15, 2026 |
| Christine Rescoussié | 12ème adjoint au Maire | March 15, 2026 |
| Henri Chassagne | 13ème adjoint au Maire | March 15, 2026 |
| Katia Touchet | 14ème adjoint au Maire | March 15, 2026 |
Show the full council (39)
| Name | Office | Since |
|---|---|---|
| Hélène de Comarmond | Maire | March 15, 2026 |
| Camille Vielhescaze | 1er adjoint au Maire | March 15, 2026 |
| Sandrine Churaqui | 2ème adjoint au Maire | March 15, 2026 |
| David Petiot | 3ème adjoint au Maire | March 15, 2026 |
| Zeïma Morin-Yahaya | 4ème adjoint au Maire | March 15, 2026 |
| Patrick Salerno | 5ème adjoint au Maire | March 15, 2026 |
| Narguesse Nazer | 6ème adjoint au Maire | March 15, 2026 |
| Samuel Besnard | 7ème adjoint au Maire | March 15, 2026 |
| Maëlle Bouglet | 8ème adjoint au Maire | March 15, 2026 |
| Stéphane Rabuel | 9ème adjoint au Maire | March 15, 2026 |
| Céline Di Mercurio | 10ème adjoint au Maire | March 15, 2026 |
| Thomas Kekenbosch | 11ème adjoint au Maire | March 15, 2026 |
| Christine Rescoussié | 12ème adjoint au Maire | March 15, 2026 |
| Henri Chassagne | 13ème adjoint au Maire | March 15, 2026 |
| Katia Touchet | 14ème adjoint au Maire | March 15, 2026 |
| Marie-Anne Beels | Conseiller municipal | March 15, 2026 |
| Maël Boudari Fontaine | Conseiller municipal | March 15, 2026 |
| Nedra Daoud | Conseiller municipal | March 15, 2026 |
| Axel Dumont | Conseiller municipal | March 15, 2026 |
| Michèle Eskinazi | Conseiller municipal | March 15, 2026 |
| Mohammadou Galoko | Conseiller municipal | March 15, 2026 |
| Elisa Garcia-Romeu | Conseiller municipal | March 15, 2026 |
| Julien Jabouin | Conseiller municipal | March 15, 2026 |
| Lionel Jeanjean | Conseiller municipal | March 15, 2026 |
| Juliette Kies | Conseiller municipal | March 15, 2026 |
| Leïla Laloupe-Rocher | Conseiller municipal | March 15, 2026 |
| Dominique Lanoë | Conseiller municipal | March 15, 2026 |
| Emmanuelle Mazuet | Conseiller municipal | March 15, 2026 |
| M'Bar N'Diaye | Conseiller municipal | March 15, 2026 |
| Alain Ospital | Conseiller municipal | March 15, 2026 |
| Nirina Rakotovao | Conseiller municipal | March 15, 2026 |
| Sébastien Reliat-Brunetière | Conseiller municipal | March 15, 2026 |
| Pierre Sabourin | Conseiller municipal | March 15, 2026 |
| Brigitte Schmitt | Conseiller municipal | March 15, 2026 |
| Marie-Catherine Scordia-Warembourg | Conseiller municipal | March 15, 2026 |
| Angélique Susini | Conseiller municipal | March 15, 2026 |
| Safae Terrisse | Conseiller municipal | March 15, 2026 |
| Sébastien Trouillas | Conseiller municipal | March 15, 2026 |
| Hervé Willaime | 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 Cachan, above.
How Cachan voted in March 2026
3 lists stood; one won more than half the votes in the first round.
8,466 votes cast for a list
8,698 of 17,441 registered voters in Cachan voted.
141 blank and 91 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.
Cachan spends €1,725 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
Cachan owed €38.5M at the end of 2025, €1,251 per resident, higher than in 80% of compared French communes, equal to 83% of a year’s running costs.
Show year by year
| Year | Spending | Investment | Debt | Debt in all |
|---|---|---|---|---|
| 2025 | €1,725 | €216 | €1,251 | €38.5M |
| 2024 | €1,789 | €276 | €1,315 | €40.6M |
| 2023 | €1,633 | €191 | €1,486 | €45.3M |
| 2022 | €1,609 | €292 | €1,550 | €47.6M |
| 2021 | €1,462 | €222 | €1,526 | €47.7M |
| 2020 | €1,506 | €296 | €1,515 | €47.8M |
| 2019 | €1,509 | €280 | €1,550 | €47.3M |
| 2018 | €1,665 | €440 | €1,460 | €44.9M |
Source: OFGL, consolidated commune accounts 2018–2025 (DGFiP); 2025 provisional.
The 12th 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: Villemomble, €95. Highest: Agde, €3,166.
Have a say in Cachan
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 Cachan 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 Cachan’s town hall
Who is the mayor of Cachan?
Hélène de Comarmond, mayor since March 15, 2026, according to the Interior ministry’s register of elected officials (August 11, 2026).
How many councilors does Cachan have?
The Cachan municipal council has 39 members, the mayor and 14 deputy mayors included.
Who won the 2026 municipal elections in Cachan?
Cachan en commun 2026 avec Hélène de COMARMOND, in the first round on March 15, 2026, with 64.4% of the votes; it holds 33 of the 39 seats.
What was the turnout in Cachan?
49.9% 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 Cachan?
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 Cachan have?
€38.5M at the end of 2025, €1,251 per resident; the median of compared French communes was €748.
Which intercommunality is Cachan part of?
Cachan is part of the Métropole du Grand Paris, 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.