In Les Ulis, turnout was lower than in 97% of compared French communes
Clovis Cassan has been mayor of Les Ulis since March 21, 2026, elected by the 35 members of the municipal council. At the March 2026 municipal elections, Osons plus grand won 34 of the 35 seats in the first round on March 15, 2026, with 91.5% of the votes. Les Ulis is part of the Communauté d'agglomération Communauté Paris-Saclay.
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 Les Ulis’s town hall
Won in the first round
Osons plus grand won 91.5% of the votes on March 15, 2026, more than half, so there was no second round; 2 lists stood. It took 34 of the 35 seats: half the seats as the list ahead, and its share of the rest. The other lists share the remaining 1. Who’s in charge ↓
Turnout below most communes
39% of registered voters in Les Ulis voted on March 15, 2026: lower than in 97% of compared French communes. The median of compared communes in Essonne was 55%; across France, 57.4%. 2026 elections ↓
Less debt per resident than most
Les Ulis owed €9.9M at the end of 2025, €383 per resident: lower than in 81% of compared French communes (France median €748). That equals 25% 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.
- Osons plus grand346 community seats
- Lutte ouvrière - Le camp des travailleurs10 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 Les Ulis 6 seats on the council of the Communauté d'agglomération Communauté Paris-Saclay (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: Clovis Cassan · 35 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, 2026Clovis Cassan
- 2Deputy mayors12 adjoints, elected by the councilSarah JaubertEdoe Koko MensahHawa CoulibalyGuenael LevrayAnnick Le PoulLoutf-Rahman OulalitEmilia RibeiroSoulé N'Gaïdé+4 more
- 3Les Ulis municipal council35 seats by listOsons plus grand 34 · Lutte ouvrière - Le camp des travailleurs 1
- 4Communauté d'agglomération Communauté Paris-SaclayLes Ulis holds 6 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 35 members of the Les Ulis municipal council
The mayor and 12 deputy mayors first, then the councilors.
| Name | Office | Since |
|---|---|---|
| Clovis Cassan | Maire | March 21, 2026 |
| Sarah Jaubert | 1er adjoint au Maire | March 21, 2026 |
| Edoe Koko Mensah | 2ème adjoint au Maire | March 21, 2026 |
| Hawa Coulibaly | 3ème adjoint au Maire | March 21, 2026 |
| Guenael Levray | 4ème adjoint au Maire | March 21, 2026 |
| Annick Le Poul | 5ème adjoint au Maire | March 21, 2026 |
| Loutf-Rahman Oulalit | 6ème adjoint au Maire | March 21, 2026 |
| Emilia Ribeiro | 7ème adjoint au Maire | March 21, 2026 |
| Soulé N'Gaïdé | 8ème adjoint au Maire | March 21, 2026 |
| Hajer Mohsni | 9ème adjoint au Maire | March 21, 2026 |
| Bruno Creve-Coeur | 10ème adjoint au Maire | March 21, 2026 |
| Emmanuelle Bourneuf | 11ème adjoint au Maire | March 21, 2026 |
| Chabane Chalal | 12ème adjoint au Maire | March 21, 2026 |
Show the full council (35)
| Name | Office | Since |
|---|---|---|
| Clovis Cassan | Maire | March 21, 2026 |
| Sarah Jaubert | 1er adjoint au Maire | March 21, 2026 |
| Edoe Koko Mensah | 2ème adjoint au Maire | March 21, 2026 |
| Hawa Coulibaly | 3ème adjoint au Maire | March 21, 2026 |
| Guenael Levray | 4ème adjoint au Maire | March 21, 2026 |
| Annick Le Poul | 5ème adjoint au Maire | March 21, 2026 |
| Loutf-Rahman Oulalit | 6ème adjoint au Maire | March 21, 2026 |
| Emilia Ribeiro | 7ème adjoint au Maire | March 21, 2026 |
| Soulé N'Gaïdé | 8ème adjoint au Maire | March 21, 2026 |
| Hajer Mohsni | 9ème adjoint au Maire | March 21, 2026 |
| Bruno Creve-Coeur | 10ème adjoint au Maire | March 21, 2026 |
| Emmanuelle Bourneuf | 11ème adjoint au Maire | March 21, 2026 |
| Chabane Chalal | 12ème adjoint au Maire | March 21, 2026 |
| Ahmed Benikene | Conseiller municipal | March 15, 2026 |
| Ilyes Bennaceur | Conseiller municipal | March 15, 2026 |
| Ismail Bentebbal | Conseiller municipal | May 16, 2026 |
| Veronique Bertrand-Rombaut | Conseiller municipal | March 15, 2026 |
| Djallal Bourada | Conseiller municipal | March 15, 2026 |
| Rose-Marie Boussamba | Conseiller municipal | March 15, 2026 |
| Lodovico Cassinari | Conseiller municipal | March 15, 2026 |
| Servane Charpentier | Conseiller municipal | March 15, 2026 |
| Etienne Charron | Conseiller municipal | March 15, 2026 |
| Karim Chentoufi | Conseiller municipal | March 15, 2026 |
| Marine Desaix | Conseiller municipal | March 15, 2026 |
| Jean-Michel Didin | Conseiller municipal | March 15, 2026 |
| Sallor Diole | Conseiller municipal | March 15, 2026 |
| Jean-Michel Espalieu | Conseiller municipal | March 15, 2026 |
| Agnès Francart | Conseiller municipal | March 15, 2026 |
| Marthe Gbaguidi | Conseiller municipal | March 15, 2026 |
| Victor Gomes | Conseiller municipal | March 15, 2026 |
| Maïmouna Koite | Conseiller municipal | March 15, 2026 |
| Kévin Mérigot | Conseiller municipal | March 15, 2026 |
| Menen-Laurhyn Norbert | Conseiller municipal | March 15, 2026 |
| Didier Paxion | Conseiller municipal | March 15, 2026 |
| Oulfa Zridate | 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 Les Ulis, above.
How Les Ulis voted in March 2026
2 lists stood; one won more than half the votes in the first round.
4,991 votes cast for a list
5,337 of 13,690 registered voters in Les Ulis voted.
262 blank and 84 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.
Les Ulis spends €1,863 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
Les Ulis owed €9.9M at the end of 2025, €383 per resident, lower than in 81% of compared French communes, equal to 25% of a year’s running costs.
Show year by year
| Year | Spending | Investment | Debt | Debt in all |
|---|---|---|---|---|
| 2025 | €1,863 | €305 | €383 | €9.9M |
| 2024 | €1,874 | €230 | €438 | €11.1M |
| 2023 | €1,920 | €248 | €500 | €12.6M |
| 2022 | €1,784 | €231 | €563 | €14.2M |
| 2021 | €1,597 | €168 | €635 | €15.8M |
| 2020 | €1,525 | €152 | €650 | €16.5M |
| 2019 | €1,884 | €440 | €732 | €18.3M |
| 2018 | €1,842 | €349 | €807 | €20.2M |
Source: OFGL, consolidated commune accounts 2018–2025 (DGFiP); 2025 provisional.
The 10th 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: Sèvremoine, €60. Highest: Vichy, €4,044.
Have a say in Les Ulis
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 Les Ulis 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 Les Ulis’s town hall
Who is the mayor of Les Ulis?
Clovis Cassan, mayor since March 21, 2026, according to the Interior ministry’s register of elected officials (August 11, 2026).
How many councilors does Les Ulis have?
The Les Ulis municipal council has 35 members, the mayor and 12 deputy mayors included.
Who won the 2026 municipal elections in Les Ulis?
Osons plus grand, in the first round on March 15, 2026, with 91.5% of the votes; it holds 34 of the 35 seats.
What was the turnout in Les Ulis?
39% 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 Les Ulis?
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 Les Ulis have?
€9.9M at the end of 2025, €383 per resident; the median of compared French communes was €748.
Which intercommunality is Les Ulis part of?
Les Ulis is part of the Communauté d'agglomération Communauté Paris-Saclay, 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.