Each edition grades its towns against each other only.
Home to 137 people, this town lies in Yvelines, Île-de-France.
Le Tertre-Saint-Denis isn’t graded: grades begin at 1,000 residents. Holiday and other second homes account for 13% of homes. Just 14% of residents are 65 or older.
The 2 things Le Tertre-Saint-Denis does most differently from other towns.
The Culture ministry lists no building in Le Tertre-Saint-Denis as a monument historique. That’s true of 25% of compared French towns too.
The nearest classé monument is Domaine de Rosay, in Rosay, 3.8 mi away.
27% of its homes were built before 1919, against 7.4% in the median compared French town.
Explore the history →Nothing in Le Tertre-Saint-Denis 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 Le Tertre-Saint-Denis.
People aged 15 to 24 make up 8.3% of the town, below Yvelines’ towns (12%) and compared French towns (11%) alike. Graduates make up 47% of adults. The age that splits Le Tertre-Saint-Denis in two is 36.5.
50% women, 50% men
About an even split. Median share of women: Yvelines 51.6%, France 51.8%.
| Le Tertre-Saint-Denis | Yvelines median | France median | |
|---|---|---|---|
| Under 15 | 27% | 20% | 17% |
| 15–24 | 8.3% | 12% | 11% |
| 25–44 | 29% | 25% | 23% |
| 45–64 | 21% | 26% | 26% |
| 65+ | 14% | 17% | 22% |
| No diploma | 11% | 13% | 19% |
| CAP or BEP | 24% | 16% | 26% |
| Baccalauréat | 16% | 16% | 18% |
| Higher education | 47% | 49% | 30% |
INSEE, census 2023 · Yvelines median and France median: the median of compared communes
Half of residents lived on more than €30,080 a year per consumption unit, lower than Yvelines’ towns (€32,600) yet higher than compared French towns (€25,970). Nearly a tenth of the labour force are out of work. Bus, tram or train carried 6.1% of working residents in Le Tertre-Saint-Denis to work at the census.
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.
Le Tertre-Saint-Denis recorded 3 home sales from July 2023 to June 2026.
Source: Housing Ministry, Carte des loyers 2025; INSEE, Filosofi 2023 · Licence Ouverte
Other places to visit and museums in and near Le Tertre-Saint-Denis. Best known first.
Wikidata has nobody with a French article born in Le Tertre-Saint-Denis yet.
Commune in Yvelines, Île-de-France
Le Tertre-Saint-Denis is a commune of 137 people in the Communauté urbaine Grand Paris Seine et Oise. 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 |
|---|---|---|---|---|---|---|
| Le Tertre-Saint-Denis | 137 | — | — | — | — | — |
| Rosny-sur-Seine | 7,328 | 4.2 | C− | C− | B | B |
| Magnanville | 6,383 | 4.3 | C+ | C− | B+ | B |
| Buchelay | 3,360 | 4.4 | C− | D | D | A− |
| Mantes-la-Ville | 22,332 | 5.3 | D | C− | C+ | B |
| Mantes-la-Jolie | 43,526 | 5.7 | D | C− | C | B− |
| Bonnières-sur-Seine | 5,064 | 6.7 | D | C | C | B− |
People: INSEE, census 2023. Miles: center to center.
Sources: INSEE, census 2023 (population, employment, commuting) · INSEE, Filosofi 2023 (income per consumption unit, poverty) · 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 9, 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.