Each edition grades its towns against each other only.
A town of 18,008 in Val-d'Oise, Île-de-France.
Strong in places, weak in others. The weak point is cost of living (D): at the median price, a 70 m² home costs 8.8 times the median annual income per consumption unit in the intercommunality. Soisy-sous-Montmorency ranks #22 of 73 in Val-d'Oise, with a C overall. That leaves it better than 32% of compared French towns. Getting around on foot or by bus is easy: 98% of residents live within 800 m of a bakery, and 43% of working residents walk, cycle or take public transport to work. Its other grades sit near the middle: C+ for safety and B− for jobs & income.
Figures: amenities, INSEE BPE 2025 · commuting and employment, INSEE census 2023 · prices, DVF · income per consumption unit (an income adjusted for household size), INSEE Filosofi · recorded crime, SSMSI (Ministry of the Interior).
Hazard risk isn’t graded in France yet: national flood maps cover only some areas. The overall grade uses the other six subjects.
Each subject compares Soisy-sous-Montmorency with other French towns of 2,500 or more, ordered by how far its rank is from the middle. American and UK towns are graded separately.
How TownRatings grades French towns →
The one thing Soisy-sous-Montmorency does most differently from other towns.
The Culture ministry lists no building in Soisy-sous-Montmorency as a monument historique. That’s true of 25% of compared French towns too.
The nearest classé monument is Hôtel de Mézières (ancien) , dit Château Goguel ou ancienne mairie, in Eaubonne, 1 mi away.
4.1% of its homes were built before 1919, against 7.4% in the median compared French town.
Explore the history →Nothing in Soisy-sous-Montmorency is on the monuments historiques list. These are the nearest classé monuments, within 15.5 mi.
Data highlights are ordered by what stands out in Soisy-sous-Montmorency.
The median disposable income was €29,460 a year per consumption unit, about level with Val-d'Oise’s towns (€28,800) and above compared French towns (€25,970). At the census, 35.9% of working residents in Soisy-sous-Montmorency went to work by public transport. Also worth knowing: 10.6% of people in the labour force have no job.
Source: INSEE, census 2023 (commuting, employment, jobs at place of work); INSEE, Filosofi 2023 · Licence Ouverte
Rents are the ministry’s estimates of advertised rents, not rents actually paid.
Half the homes sold went for more than €3,688/m², higher than both Val-d'Oise’s towns (€3,266/m²) and compared French towns (€2,430/m²). Houses in Soisy-sous-Montmorency sell for €4,397/m² and apartments for €3,200/m². Sales in the town from July 2023 to June 2026: 479 houses and apartments.
| By type | Median per m² | Sales |
|---|---|---|
| Houses | €4,397/m² | 223 |
| Apartments | €3,200/m² | 256 |
Source: DGFiP, DVF property sales (Etalab geolocated); Housing Ministry, Carte des loyers 2025; INSEE, Filosofi 2023 · Licence Ouverte
Primary schools aren’t graded: France doesn’t publish their results by school.
On results, collèges and lycées here come #12 of 76 in Val-d'Oise.
| School | Level | Candidates | Passed, 2025 |
|---|---|---|---|
| Collège Albert SchweitzerNearest collègeCollège | Collège | 117 | 70%−15 pts |
| Lycée Louis ArmandNearest lycéeGeneral lycée | General lycée | 314 | 92%−4 pts |
| Lycée polyvalent Louise MichelBest against expectations: 14 points above the expected rateVocational lycée | Vocational lycée | 100 | 88%+14 pts |
Ministry of Education (DEPP) · brevet and bac 2025, value added (IVAC, IVAL) · Licence Ouverte
Care access and life expectancy are shown for context, not graded.
In Val-d'Oise, life expectancy at birth reaches 85.9 years for women and 81.1 for men (2025), next to 85.9 and 80.3 for France. From 2016 to 2025, 1,375 residents of Soisy-sous-Montmorency died, against 1,549 expected from France’s death rates at each age: 11% fewer. There are 10 general practitioners in the town.
Source: INSEE, deaths by commune of residence 2016–2025 and censuses; Eurostat, death rates by age (© European Union); INSEE, BPE 2025; DREES, APL 2024; INSEE, life expectancy by département 2025 · Licence Ouverte · Care-home places are adjusted for by TownRatings, using a model rather than an official statistic.
Children under 15 count for 18% of the people here. 13% of residents are 15 to 24, close to Val-d'Oise’s towns (12%) and above compared French towns (11%). People 65 and over make up nearly a fifth of the town.
53% women, 47% men
About 90 men for every 100 women. Median share of women: Val-d'Oise 51.5%, France 51.8%.
| Soisy-sous-Montmorency | Val-d'Oise median | France median | |
|---|---|---|---|
| Under 15 | 18% | 21% | 17% |
| 15–24 | 13% | 12% | 11% |
| 25–44 | 24% | 26% | 23% |
| 45–64 | 26% | 25% | 26% |
| 65+ | 19% | 15% | 22% |
| No diploma | 19% | 17% | 19% |
| CAP or BEP | 16% | 20% | 26% |
| Baccalauréat | 18% | 19% | 18% |
| Higher education | 42% | 38% | 30% |
INSEE, census 2023 · Val-d'Oise median and France median: the median of compared communes
Over 2025, Soisy-sous-Montmorency logged 381 recorded offenses. The yearly rates for 2023–2025: 7.6 violent offenses and 15.1 graded property crimes per 1,000 residents. Criminal damage topped the graded crimes in Soisy-sous-Montmorency (2025).
Not in the gradeTheft without violence, drug use and fraud are shown for information but left out of the Safety Grade, which counts violence plus burglaries, vehicle thefts, thefts from vehicles and criminal damage per resident.
Source: SSMSI (Interior Ministry), recorded crime by commune, 2023–2025 · Licence Ouverte · Small counts of armed robbery go unpublished (five or fewer in at least one of the last three years); the département’s average stands in, 0.4% of the index here. The count covers the offense categories the Safety Grade uses.
Heritage, other places to visit and museums in and near Soisy-sous-Montmorency. Best known first.
MuseumMaison de Jean-Jacques Rousseau et Maison des Commères1.7 km east, in Montmorency
MuseumMusée Jean-Jacques-Rousseau1.7 km east, in MontmorencyChâteauChâteauFort de Montmorency2.4 km northeast, in MontmorencyChâteauChâteauChâteau de Belmont2 km north, in AndillyGardenGardenJardin botanique de Sannois des Plantes Médicinales3.4 km southwest, in SannoisPhotos from Wikimedia Commons, each under its own licence (our copy, resized).
29 notable people were born in Soisy-sous-Montmorency.
Adrian Mannarino: Carine06 from UK, CC BY-SA 2.0 · Madeleine Malonga: William Jexpire, CC BY-SA 4.0 · Christian Noyer: CB Richard Ellis, CC BY-SA 3.0 · Christophe Agnolutto: Eric HOUDAS, CC BY-SA 3.0 · Roxane Fournier: Hoebele, CC BY-SA 4.0 · Thibault Rossard: Pierre-Yves Beaudouin, CC BY-SA 3.0
Commune in Val-d'Oise, Île-de-France
Soisy-sous-Montmorency is a commune of 18,008 people in the Communauté d'agglomération Plaine Vallée. TownRatings compares communes, France’s local unit: each has its own mayor and its own statistics. Its area takes in the town and the countryside around it.
Built from INSEE’s 2026 official geography (COG) and IGN Admin Express boundaries
The nearest towns of 2,500 or more. The map uses IGN’s commune boundaries. See them on the map →
| Town | People | Miles | Overall | Cost | Safety | Health |
|---|---|---|---|---|---|---|
| Soisy-sous-Montmorency | 18,008 | — | C | D | C+ | B+ |
| Eaubonne | 26,211 | 0.9 | C+ | D− | B− | B |
| Margency | 3,012 | 0.9 | B | D | B+ | A |
| Montmorency | 21,763 | 1 | C | D− | C+ | A− |
| Andilly | 2,742 | 1 | B− | D | B− | A |
| Enghien-les-Bains | 11,432 | 1.4 | C | D− | C− | A |
| Montlignon | 3,038 | 1.6 | B | D | A | A− |
People: INSEE, census 2023. Miles: center to center.
It grades C+ for safety, #24 of 73 in Val-d'Oise. In 2025 police and gendarmerie recorded 43 burglaries and 124 acts of criminal damage.
They grade C−, better than 19% of compared French towns and #12 of 76 in Val-d'Oise. 92% of 314 candidates passed the bac at Lycée Louis Armand in 2025, 4 points below the expected rate given its pupils’ backgrounds. Primary schools aren’t graded: France doesn’t publish their results by school.
Incomes are higher than in most compared French towns, so Soisy-sous-Montmorency grades D for cost of living.
Sources: INSEE, census 2023 (population, employment, commuting) · INSEE, Filosofi 2023 (income per consumption unit, poverty) · DGFiP, DVF property sales, July 2023 to June 2026 · Housing Ministry, Carte des loyers 2025 · SSMSI, recorded crime by commune, 2023–2025 · Ministry of Education (DEPP), brevet and bac results and value-added indicators, 2025 · INSEE, deaths by commune of residence 2016–2025 and censuses 2012–2023; Eurostat, death rates by age (© European Union); INSEE, BPE 2025 (care homes, emergency and maternity units, GPs, pharmacies); DREES, APL 2024; INSEE, life expectancy by département 2025 (provisional) · INSEE, BPE 2025 and Filosofi 200 m grid (walking distances) · IGN Admin Express (boundaries) · TownRatings grades: our own summary of the data, ranking French towns against each other only, updated November 8, 2026. 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.