Photo: VVVCFFrance · CC BY-SA 4.0Montlignon carries less debt per resident than 84% of compared communes
Sylvie Jacquin has been mayor of Montlignon since March 22, 2026, elected by the 23 members of the municipal council. At the March 2026 municipal elections, AVEC VOUS VIVRE MONTLIGNON won 19 of the 23 seats in the first round on March 15, 2026, with 58.3% of the votes. Montlignon is part of the Communauté d'agglomération Plaine Vallée.
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 Montlignon’s town hall
Won in the first round
AVEC VOUS VIVRE MONTLIGNON won 58.3% of the votes on March 15, 2026, more than half, so there was no second round; 3 lists stood. It took 19 of the 23 seats: half the seats as the list ahead, and its share of the rest. The other lists share the remaining 4. Who’s in charge ↓
Turnout above most communes
61.9% of registered voters in Montlignon voted on March 15, 2026: higher than in 71% of compared French communes. The median of compared communes in Val-d'Oise was 52.1%; across France, 57.4%. 2026 elections ↓
Less debt per resident than most
Montlignon owed €997K at the end of 2025, €327 per resident: lower than in 84% of compared French communes (France median €748). That equals 29% 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.
- AVEC VOUS VIVRE MONTLIGNON191 community seat
- MONTLIGNON, NOTRE VILLAGE, NOTRE AVENIR30 community seats
- MONTLIGNON, UN HERITAGE, UNE AMBITION10 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 Montlignon 1 seat on the council of the Communauté d'agglomération Plaine Vallée (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: Sylvie Jacquin · 23 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 22, 2026Sylvie Jacquin
- 2Deputy mayors4 adjoints, elected by the councilGaëlle KhairallahJean-Paul GontierMartine PesterJean-Luc Ricci
- 3Montlignon municipal council23 seats by listAVEC VOUS VIVRE MONTLIGNON 19 · MONTLIGNON, NOTRE VILLAGE, NOTRE AVENIR 3 · MONTLIGNON, UN HERITAGE, UNE AMBITION 1
- 4Communauté d'agglomération Plaine ValléeMontlignon 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 23 members of the Montlignon municipal council
The mayor and 4 deputy mayors first, then the councilors.
| Name | Office | Since |
|---|---|---|
| Sylvie Jacquin | Maire | March 22, 2026 |
| Gaëlle Khairallah | 1er adjoint au Maire | March 22, 2026 |
| Jean-Paul Gontier | 2ème adjoint au Maire | March 22, 2026 |
| Martine Pester | 3ème adjoint au Maire | March 22, 2026 |
| Jean-Luc Ricci | 4ème adjoint au Maire | March 22, 2026 |
Show the full council (23)
| Name | Office | Since |
|---|---|---|
| Sylvie Jacquin | Maire | March 22, 2026 |
| Gaëlle Khairallah | 1er adjoint au Maire | March 22, 2026 |
| Jean-Paul Gontier | 2ème adjoint au Maire | March 22, 2026 |
| Martine Pester | 3ème adjoint au Maire | March 22, 2026 |
| Jean-Luc Ricci | 4ème adjoint au Maire | March 22, 2026 |
| Florian Bucher | Conseiller municipal | March 15, 2026 |
| Sandrine Couchy | Conseiller municipal | March 15, 2026 |
| Arnaud Dufour | Conseiller municipal | March 15, 2026 |
| Odile Falce | Conseiller municipal | March 15, 2026 |
| Florent Fichou | Conseiller municipal | March 15, 2026 |
| Abdel-Hamid Hasnaoui | Conseiller municipal | March 15, 2026 |
| Zara Ifersen | Conseiller municipal | March 15, 2026 |
| Eric Le Creff | Conseiller municipal | March 15, 2026 |
| Magalie Liebmann | Conseiller municipal | March 15, 2026 |
| Joseph Loggah-Nkomb | Conseiller municipal | March 15, 2026 |
| Melissa Madhkour | Conseiller municipal | March 15, 2026 |
| Thierry Maniére | Conseiller municipal | March 15, 2026 |
| Stéphane Marecat | Conseiller municipal | March 15, 2026 |
| Stéphane Morin | Conseiller municipal | March 15, 2026 |
| Christine Nagot | Conseiller municipal | March 15, 2026 |
| Christelle Pelletier | Conseiller municipal | March 15, 2026 |
| Dominique Poret | Conseiller municipal | March 15, 2026 |
| Sébastien Skrzypczak | 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 Montlignon, above.
How Montlignon voted in March 2026
3 lists stood; one won more than half the votes in the first round.
1,416 votes cast for a list
1,442 of 2,330 registered voters in Montlignon voted.
18 blank and 8 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.
Montlignon spends €1,419 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
Montlignon owed €997K at the end of 2025, €327 per resident, lower than in 84% of compared French communes, equal to 29% of a year’s running costs.
Show year by year
| Year | Spending | Investment | Debt | Debt in all |
|---|---|---|---|---|
| 2025 | €1,419 | €273 | €327 | €997K |
| 2024 | €1,433 | €294 | €392 | €1.2M |
| 2023 | €1,321 | €301 | €443 | €1.3M |
| 2022 | €1,617 | €683 | €506 | €1.5M |
| 2021 | €1,133 | €200 | €569 | €1.7M |
| 2020 | €1,022 | €137 | €631 | €1.9M |
| 2019 | €1,216 | €216 | €521 | €1.6M |
| 2018 | €1,537 | €577 | €717 | €2.3M |
Source: OFGL, consolidated commune accounts 2018–2025 (DGFiP); 2025 provisional.
The 5th 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: Pont-à-Vendin, €16. Highest: Coupvray, €2,382.
Have a say in Montlignon
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 Montlignon 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 Montlignon’s town hall
Who is the mayor of Montlignon?
Sylvie Jacquin, mayor since March 22, 2026, according to the Interior ministry’s register of elected officials (August 11, 2026).
How many councilors does Montlignon have?
The Montlignon municipal council has 23 members, the mayor and 4 deputy mayors included.
Who won the 2026 municipal elections in Montlignon?
AVEC VOUS VIVRE MONTLIGNON, in the first round on March 15, 2026, with 58.3% of the votes; it holds 19 of the 23 seats.
What was the turnout in Montlignon?
61.9% 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 Montlignon?
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 Montlignon have?
€997K at the end of 2025, €327 per resident; the median of compared French communes was €748.
Which intercommunality is Montlignon part of?
Montlignon is part of the Communauté d'agglomération Plaine Vallée, 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.