Photo: Pierre Poschadel · CC BY-SA 4.0Athis-Mons invested less per resident in 2025 than 81% of compared communes
Jean-Jacques Grousseau has been mayor of Athis-Mons since March 21, 2026, elected by the 39 members of the municipal council. At the March 2026 municipal elections, Jean-Jacques GROUSSEAU Toujours à vos côtés pour Athis-Mons won 33 of the 39 seats in the first round on March 15, 2026, with 59.6% of the votes. Athis-Mons 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 Essonne and the France median are the median of compared communes (those with an overall grade), each figure its own median.
What stands out about Athis-Mons’s town hall
Won in the first round
Jean-Jacques GROUSSEAU Toujours à vos côtés pour Athis-Mons won 59.6% of the votes on March 15, 2026, more than half, so there was no second round; 5 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
50% of registered voters in Athis-Mons voted on March 15, 2026: lower than in 78% of compared French communes. The median of compared communes in Essonne was 55%; across France, 57.4%. 2026 elections ↓
Little investment
Athis-Mons invested €228 per resident (buildings, roads, equipment), 15% of its spending: lower than in 81% 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.
- Jean-Jacques GROUSSEAU Toujours à vos côtés pour Athis-Mons331 community seat
- Rassembler pour Athis-Mons20 community seats
- Athis-Mons en action20 community seats
- Agir pour Athis-Mons10 community seats
- Faire mieux pour tout Athis10 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 Athis-Mons 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: Jean-Jacques Grousseau · 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 21, 2026Jean-Jacques Grousseau
- 2Deputy mayors11 adjoints, elected by the councilSamia HebbadjYanisse LalouciOdile LinekThibaud TaminAlexandra BeaudoinRachid MirSaïda MoumanPatrice Sac+3 more
- 3Athis-Mons municipal council39 seats by listJean-Jacques GROUSSEAU Toujours à vos côtés pour Athis-Mons 33 · Rassembler pour Athis-Mons 2 · Athis-Mons en action 2 · Agir pour Athis-Mons 1 · Faire mieux pour tout Athis 1
- 4Métropole du Grand ParisAthis-Mons 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 Athis-Mons municipal council
The mayor and 11 deputy mayors first, then the councilors.
| Name | Office | Since |
|---|---|---|
| Jean-Jacques Grousseau | Maire | March 21, 2026 |
| Samia Hebbadj | 1er adjoint au Maire | March 21, 2026 |
| Yanisse Lalouci | 2ème adjoint au Maire | March 21, 2026 |
| Odile Linek | 3ème adjoint au Maire | March 21, 2026 |
| Thibaud Tamin | 4ème adjoint au Maire | March 21, 2026 |
| Alexandra Beaudoin | 5ème adjoint au Maire | March 21, 2026 |
| Rachid Mir | 6ème adjoint au Maire | March 21, 2026 |
| Saïda Mouman | 7ème adjoint au Maire | March 21, 2026 |
| Patrice Sac | 8ème adjoint au Maire | March 21, 2026 |
| Sandrine Bolmin | 9ème adjoint au Maire | March 21, 2026 |
| Mustafa Gündüz | 10ème adjoint au Maire | March 21, 2026 |
| Nadia Aït Tayeb | 11ème adjoint au Maire | March 21, 2026 |
Show the full council (39)
| Name | Office | Since |
|---|---|---|
| Jean-Jacques Grousseau | Maire | March 21, 2026 |
| Samia Hebbadj | 1er adjoint au Maire | March 21, 2026 |
| Yanisse Lalouci | 2ème adjoint au Maire | March 21, 2026 |
| Odile Linek | 3ème adjoint au Maire | March 21, 2026 |
| Thibaud Tamin | 4ème adjoint au Maire | March 21, 2026 |
| Alexandra Beaudoin | 5ème adjoint au Maire | March 21, 2026 |
| Rachid Mir | 6ème adjoint au Maire | March 21, 2026 |
| Saïda Mouman | 7ème adjoint au Maire | March 21, 2026 |
| Patrice Sac | 8ème adjoint au Maire | March 21, 2026 |
| Sandrine Bolmin | 9ème adjoint au Maire | March 21, 2026 |
| Mustafa Gündüz | 10ème adjoint au Maire | March 21, 2026 |
| Nadia Aït Tayeb | 11ème adjoint au Maire | March 21, 2026 |
| Haja Benglia | Conseiller municipal | March 15, 2026 |
| Odile Bouvier | Conseiller municipal | March 15, 2026 |
| Joaquim de Sousa Antunes | Conseiller municipal | March 15, 2026 |
| Jean-Jacques Delaveau | Conseiller municipal | March 15, 2026 |
| Julien Dumaine | Conseiller municipal | March 15, 2026 |
| Françoise Dusson-Duthoit | Conseiller municipal | March 15, 2026 |
| Richard Elbilia | Conseiller municipal | March 15, 2026 |
| Isabelle Hernandez | Conseiller municipal | March 15, 2026 |
| Martine Joint | Conseiller municipal | March 15, 2026 |
| Charles-Louis Josa | Conseiller municipal | March 15, 2026 |
| Bakary Kante | Conseiller municipal | March 15, 2026 |
| Antoine Lalanne-Desmet | Conseiller municipal | March 15, 2026 |
| Daniel Lambert | Conseiller municipal | March 15, 2026 |
| Rebecca Lubilu Mulamba | Conseiller municipal | March 15, 2026 |
| Chakib Mokhtari | Conseiller municipal | March 15, 2026 |
| Francine Moreau | Conseiller municipal | March 15, 2026 |
| André Nakache | Conseiller municipal | March 15, 2026 |
| Mélisa Ouadi | Conseiller municipal | March 15, 2026 |
| Loïc Pichon | Conseiller municipal | March 15, 2026 |
| Nadine Ribéro | Conseiller municipal | March 15, 2026 |
| Fatoumata Sow | Conseiller municipal | March 15, 2026 |
| Jason Sturer | Conseiller municipal | March 15, 2026 |
| Samir Tahari | Conseiller municipal | March 15, 2026 |
| Jemina Taillefond | Conseiller municipal | March 15, 2026 |
| Habib Touiza | Conseiller municipal | March 15, 2026 |
| Arnaud Vareille | Conseiller municipal | March 15, 2026 |
| Bernadette Vernade | 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 Athis-Mons, above.
How Athis-Mons voted in March 2026
5 lists stood; one won more than half the votes in the first round.
9,741 votes cast for a list
9,893 of 19,789 registered voters in Athis-Mons voted.
91 blank and 61 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.
Athis-Mons spends €1,486 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
Athis-Mons owed €22M at the end of 2025, €599 per resident, lower than in 63% of compared French communes, equal to 48% of a year’s running costs.
Show year by year
| Year | Spending | Investment | Debt | Debt in all |
|---|---|---|---|---|
| 2025 | €1,486 | €228 | €599 | €22M |
| 2024 | €1,466 | €231 | €616 | €22.5M |
| 2023 | €1,490 | €250 | €603 | €21.7M |
| 2022 | €1,282 | €139 | €539 | €19.4M |
| 2021 | €1,301 | €174 | €620 | €22M |
| 2020 | €1,183 | €100 | €665 | €23.1M |
| 2019 | €1,527 | €429 | €761 | €25.9M |
| 2018 | €1,213 | €112 | €795 | €26.4M |
Source: OFGL, consolidated commune accounts 2018–2025 (DGFiP); 2025 provisional.
The 6th 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: Tremblay-en-France, €230. Highest: Chartres, €4,713.
Have a say in Athis-Mons
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 Athis-Mons 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 Athis-Mons’s town hall
Who is the mayor of Athis-Mons?
Jean-Jacques Grousseau, mayor since March 21, 2026, according to the Interior ministry’s register of elected officials (August 11, 2026).
How many councilors does Athis-Mons have?
The Athis-Mons municipal council has 39 members, the mayor and 11 deputy mayors included.
Who won the 2026 municipal elections in Athis-Mons?
Jean-Jacques GROUSSEAU Toujours à vos côtés pour Athis-Mons, in the first round on March 15, 2026, with 59.6% of the votes; it holds 33 of the 39 seats.
What was the turnout in Athis-Mons?
50% 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 Athis-Mons?
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 Athis-Mons have?
€22M at the end of 2025, €599 per resident; the median of compared French communes was €748.
Which intercommunality is Athis-Mons part of?
Athis-Mons 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.