Each edition grades its towns against each other only.
A town of 8,453 in Val-d'Oise, Île-de-France.
Groslay grades C− overall: better than 17% of compared French towns, and #43 of 73 in Val-d'Oise. Its weakest subject is cost of living (D): at the median price, a 70 m² home costs 8 times the median annual income per consumption unit in the intercommunality. Its strongest is walkability (A+): 100% of residents live within 800 m of a bakery, and 47% of working residents walk, cycle or take public transport to work.
Hazard risk isn’t graded in France yet: national flood maps cover only some areas. The overall grade uses the other six subjects.
The 2 things Groslay does most differently from other towns.
Each subject compares Groslay 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 Culture ministry lists 1 historic monument in Groslay: 1 classé (France’s highest heritage protection) and 0 inscrit (the second level).
The oldest protected part dates from the 12th century; the first monument here was protected in 1929.
Ferdinand Martin, born in 1795, is the one person born in Groslay before 1900 that Wikidata records.
Heritage, museums and other places to visit in and near Groslay. Best known first.
ChâteauChâteau d'Écouen4 km northeast, in Écouen
MuseumMaison de Jean-Jacques Rousseau et Maison des Commères2.1 km west, in Montmorency
MuseumMusée Jean-Jacques-Rousseau2.1 km west, in MontmorencyChâteauChâteauFort de Montmorency2.4 km northwest, in MontmorencyChâteauChâteauManoir de Miraville2.4 km northeast, in SarcellesChâteauChâteauChâteau de Belmont4 km northwest, in AndillyPhotos from Wikimedia Commons, each under its own licence (our copy, resized).
Data highlights are ordered by what stands out in Groslay.
For Groslay, that is above both Val-d'Oise’s towns (38.0%) and compared French towns (13.4%). The median disposable income is €29,630 a year per consumption unit. Groslay has 1,700 jobs for 3,900 working residents, 0.4 per worker.
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.
That is the middle of 236 sales of houses and apartments in Groslay from July 2023 to June 2026, against €2,430/m² for the median of compared French towns and €3,266/m² for the median of compared towns in Val-d'Oise.
| By type | Median per m² | Sales |
|---|---|---|
| Houses | €3,804/m² | 122 |
| Apartments | €3,082/m² | 114 |
Source: DGFiP, DVF property sales (Etalab geolocated); Housing Ministry, Carte des loyers 2025; INSEE, Filosofi 2023 · Licence Ouverte
Groslay sits above both Val-d'Oise’s towns (38%) and compared French towns (30%) on this measure. Those 65 and older account for 14% of residents.
52% women, 48% men
About 93 men for every 100 women. Median share of women: Val-d'Oise 51.5%, France 51.8%.
| Groslay | Val-d'Oise median | France median | |
|---|---|---|---|
| Under 15 | 20% | 21% | 17% |
| 15–24 | 12% | 12% | 11% |
| 25–44 | 27% | 26% | 23% |
| 45–64 | 26% | 25% | 26% |
| 65+ | 14% | 15% | 22% |
| No diploma | 18% | 17% | 19% |
| CAP or BEP | 18% | 20% | 26% |
| Baccalauréat | 18% | 19% | 18% |
| Higher education | 41% | 38% | 30% |
INSEE, census 2023 · Val-d'Oise median and France median: the median of compared communes
Primary schools aren’t graded: France doesn’t publish their results by school.
That puts Groslay below both Val-d'Oise’s towns (82.7%) and compared French towns (87.5%).
| School | Level | Candidates | Passed, 2025 |
|---|---|---|---|
| Collège L'Ardillière de NézantNearest collègeCollège | Collège | 133 | 77%−2 pts |
| Lycée La Salle - Saint-Rosaire PrivateNearest lycéeGeneral lycée | General lycée | 180 | 99%+1 pt |
| Collège Alfred SisleyBest against expectations: 22 points above the expected rateCollège | Collège | 80 | 79%+22 pts |
Ministry of Education (DEPP) · brevet and bac 2025, value added (IVAC, IVAL) · Licence Ouverte
Police and gendarmerie recorded 199 offenses in the graded categories in Groslay in 2025. For armed robbery, this figure isn’t published when it’s small (five or fewer in at least one of the last three years); the index uses the département’s average instead, 0.7% of the index here.
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
France has no History Grade yet: this card describes, it doesn’t grade.
The Culture ministry lists 1 historic monument in Groslay: 1 classé (France’s highest heritage protection) and 0 inscrit (the second level).
Ministère de la Culture, Mérimée (Licence Ouverte 2.0) · INSEE, census 2023, homes by build period
Care access and life expectancy are shown for context, not graded.
From 2016 to 2025, 436 residents of Groslay died, against 497 expected from France’s death rates at each age: 12% fewer. The adjustment lowers most towns’ figures, so the comparison is what counts: the median of compared French towns is 12% below expected. The care-home adjustment is a TownRatings modeling step, not an official statistic.
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
Groslay has one historic monument; beside it, the nearest classé monuments in other towns, within 15.5 mi.
Église Saint-Martin: Photo: P.poschadel · CC BY-SA 3.0
2 notable people were born in Groslay.
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 |
|---|---|---|---|---|---|---|
| Groslay | 8,453 | — | C− | D | C | B− |
| Saint-Brice-sous-Forêt | 15,063 | 0.9 | C− | D | D | A |
| Montmagny | 15,105 | 1.2 | D | D | C | A− |
| Sarcelles | 59,173 | 1.3 | D− | C− | D | C− |
| Montmorency | 21,763 | 1.4 | C | D− | C+ | A− |
| Deuil-la-Barre | 23,099 | 1.6 | C | D | C | A |
| Villetaneuse Seine-Saint-Denis | 12,530 | 2 | D | D | D | B |
People: INSEE, census 2023. Miles: center to center.
It grades C for safety, #47 of 73 in Val-d'Oise. In 2025 police and gendarmerie recorded 28 burglaries and 72 acts of criminal damage.
They grade D, better than 14% of compared French towns and #29 of 76 in Val-d'Oise. The lycée stands out: 99% of 180 candidates passed the bac at Lycée La Salle - Saint-Rosaire in 2025, a point above the expected rate given its pupils’ backgrounds. Primary schools aren’t graded: France doesn’t publish their results by school.
By type: houses €3,804/m² (122 sales), apartments €3,082/m² (114 sales). Estimated advertised apartment rents are €18.03/m² a month, charges included. Incomes are higher than in most compared French towns, so Groslay grades D for cost of living.
Commune in Val-d'Oise, Île-de-France
Groslay is a commune of 8,453 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
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 October 30, 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.