Photo: Benchaum · CC BY-SA 3.0Herblay-sur-Seine carries more debt per resident than 88% of compared communes
Philippe Rouleau has been mayor of Herblay-sur-Seine since March 21, 2026, elected by the 39 members of the municipal council. At the March 2026 municipal elections, Herblay-Sur-Seine Notre Ville won 33 of the 39 seats in the first round on March 15, 2026, with 63.9% of the votes. Herblay-sur-Seine is part of the Communauté d'agglomération Val Parisis.
March 2032
Councils are elected for six years; the council elects the mayor.
Register to vote ↗Throughout this page, the median in Val-d'Oise and the France median are the median of compared communes (those with an overall grade), each figure its own median.
What stands out about Herblay-sur-Seine’s town hall
Won in the first round
Herblay-Sur-Seine Notre Ville won 63.9% of the votes on March 15, 2026, more than half, so there was no second round; 4 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
51% of registered voters in Herblay-sur-Seine voted on March 15, 2026: lower than in 75% of compared French communes. The median of compared communes in Val-d'Oise was 52.1%; across France, 57.4%. 2026 elections ↓
More debt per resident than most
Herblay-sur-Seine owed €48M at the end of 2025, €1,498 per resident: higher than in 88% of compared French communes (France median €748). That equals 112% of a year’s running costs. 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.
- Herblay-Sur-Seine Notre Ville338 community seats
- Herblay une autre voie31 community seat
- HERBLAY DEMAIN30 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 Herblay-sur-Seine 9 seats on the council of the Communauté d'agglomération Val Parisis (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: Philippe Rouleau · 39 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 21, 2026Philippe Rouleau
- 2Deputy mayors11 adjoints, elected by the councilPhilippe BaratNadine PorchezJohann RosSarah Nerozzi-BanfiDavid GossetSéverine GomesPhilippe VonmeursMarlène Mathiot+3 more
- 3Herblay-sur-Seine municipal council39 seats by listHerblay-Sur-Seine Notre Ville 33 · Herblay une autre voie 3 · HERBLAY DEMAIN 3
- 4Communauté d'agglomération Val ParisisHerblay-sur-Seine holds 9 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 39 members of the Herblay-sur-Seine municipal council
The mayor and 11 deputy mayors first, then the councilors.
| Name | Office | Since |
|---|---|---|
| Philippe Rouleau | Maire | March 21, 2026 |
| Philippe Barat | 1er adjoint au Maire | March 21, 2026 |
| Nadine Porchez | 2ème adjoint au Maire | March 21, 2026 |
| Johann Ros | 3ème adjoint au Maire | March 21, 2026 |
| Sarah Nerozzi-Banfi | 4ème adjoint au Maire | March 21, 2026 |
| David Gosset | 5ème adjoint au Maire | March 21, 2026 |
| Séverine Gomes | 6ème adjoint au Maire | March 21, 2026 |
| Philippe Vonmeurs | 7ème adjoint au Maire | March 21, 2026 |
| Marlène Mathiot | 8ème adjoint au Maire | March 21, 2026 |
| Dominique Roussel | 9ème adjoint au Maire | March 21, 2026 |
| Sophie Levasseur | 10ème adjoint au Maire | March 21, 2026 |
| Benoît Vincent | 11ème adjoint au Maire | March 21, 2026 |
Show the full council (39)
| Name | Office | Since |
|---|---|---|
| Philippe Rouleau | Maire | March 21, 2026 |
| Philippe Barat | 1er adjoint au Maire | March 21, 2026 |
| Nadine Porchez | 2ème adjoint au Maire | March 21, 2026 |
| Johann Ros | 3ème adjoint au Maire | March 21, 2026 |
| Sarah Nerozzi-Banfi | 4ème adjoint au Maire | March 21, 2026 |
| David Gosset | 5ème adjoint au Maire | March 21, 2026 |
| Séverine Gomes | 6ème adjoint au Maire | March 21, 2026 |
| Philippe Vonmeurs | 7ème adjoint au Maire | March 21, 2026 |
| Marlène Mathiot | 8ème adjoint au Maire | March 21, 2026 |
| Dominique Roussel | 9ème adjoint au Maire | March 21, 2026 |
| Sophie Levasseur | 10ème adjoint au Maire | March 21, 2026 |
| Benoît Vincent | 11ème adjoint au Maire | March 21, 2026 |
| Adèle Albert-Etienne | Conseiller municipal | March 15, 2026 |
| Michaël Baumgartner | Conseiller municipal | March 15, 2026 |
| Mounir Bayach | Conseiller municipal | March 15, 2026 |
| Samira Belmokhtar | Conseiller municipal | March 15, 2026 |
| Nathan Borowiecki | Conseiller municipal | March 15, 2026 |
| Philippe Cerisier | Conseiller municipal | March 15, 2026 |
| Christian Chapellon | Conseiller municipal | March 15, 2026 |
| Nathalie Chauffour | Conseiller municipal | March 15, 2026 |
| Elya Conza | Conseiller municipal | March 15, 2026 |
| Olivier Dalmont | Conseiller municipal | March 15, 2026 |
| Xavier Daudé | Conseiller municipal | March 15, 2026 |
| Mohamed El Baghdadi | Conseiller municipal | March 15, 2026 |
| Célina Flavenot | Conseiller municipal | March 15, 2026 |
| Cécile Jobin | Conseiller municipal | March 15, 2026 |
| Evelyne Largenton | Conseiller municipal | March 15, 2026 |
| Axel Legrand | Conseiller municipal | March 15, 2026 |
| Philippe Leveque | Conseiller municipal | March 15, 2026 |
| Catherine Lignier | Conseiller municipal | March 15, 2026 |
| Anisse Magri | Conseiller municipal | March 15, 2026 |
| Marianne Patarin | Conseiller municipal | March 15, 2026 |
| Gérard Pipat | Conseiller municipal | March 15, 2026 |
| Cécile Rilhac | Conseiller municipal | March 15, 2026 |
| Sofia Rodas-Pawloff | Conseiller municipal | March 15, 2026 |
| Linda Saget | Conseiller municipal | March 15, 2026 |
| Oriane Simon | Conseiller municipal | March 15, 2026 |
| Yasmina Soltani | Conseiller municipal | March 15, 2026 |
| Sohane Zadigue-Baptiste | 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 Herblay-sur-Seine, above.
How Herblay-sur-Seine voted in March 2026
4 lists stood; one won more than half the votes in the first round.
10,319 votes cast for a list
10,511 of 20,613 registered voters in Herblay-sur-Seine voted.
119 blank and 73 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.
Herblay-sur-Seine spends €1,647 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
Herblay-sur-Seine owed €48M at the end of 2025, €1,498 per resident, higher than in 88% of compared French communes, equal to 112% of a year’s running costs.
Show year by year
| Year | Spending | Investment | Debt | Debt in all |
|---|---|---|---|---|
| 2025 | €1,647 | €313 | €1,498 | €48M |
| 2024 | €1,685 | €355 | €1,475 | €47M |
| 2023 | €1,909 | €631 | €1,528 | €48.8M |
| 2022 | €1,740 | €537 | €1,312 | €41.4M |
| 2021 | €1,543 | €345 | €1,163 | €35.2M |
| 2020 | €1,361 | €172 | €1,170 | €34.6M |
| 2019 | €1,552 | €341 | €1,253 | €37.1M |
| 2018 | €1,477 | €279 | €1,383 | €40M |
Source: OFGL, consolidated commune accounts 2018–2025 (DGFiP); 2025 provisional.
The 8th 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: Montigny-le-Bretonneux, €257. Highest: Carpentras, €2,742.
Have a say in Herblay-sur-Seine
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 Herblay-sur-Seine 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 Herblay-sur-Seine’s town hall
Who is the mayor of Herblay-sur-Seine?
Philippe Rouleau, mayor since March 21, 2026, according to the Interior ministry’s register of elected officials (August 11, 2026).
How many councilors does Herblay-sur-Seine have?
The Herblay-sur-Seine municipal council has 39 members, the mayor and 11 deputy mayors included.
Who won the 2026 municipal elections in Herblay-sur-Seine?
Herblay-Sur-Seine Notre Ville, in the first round on March 15, 2026, with 63.9% of the votes; it holds 33 of the 39 seats.
What was the turnout in Herblay-sur-Seine?
51% 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 Herblay-sur-Seine?
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 Herblay-sur-Seine have?
€48M at the end of 2025, €1,498 per resident; the median of compared French communes was €748.
Which intercommunality is Herblay-sur-Seine part of?
Herblay-sur-Seine is part of the Communauté d'agglomération Val Parisis, 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.