Jambville

Identity

Jambville (INSEE 78317) is in Yvelines (78), part of CU Grand Paris Seine et Oise. Population 793 (2023). ^[1]

INSEE density class: Bourgs ruraux (level 5). ^[2]

Data vintages: INSEE BPE 2025 · INSEE SIRENE 2026-09 · INSEE census (RP) 2023 · INSEE COG 2026 · INSEE density grid 2026.

Permanent link: https://vivantrural.com/en/fr/78317-jambville

Vitality score

Vitality score 24.4/100 — Few services (model fr-v0.2).

Confidence: high.

Better served than 24 % of the 15,683 communes of a similar size.

Compare this with communes of a similar size. The score measures how well a place is served relative to its own size band, and larger communes score higher as a rule — so it reads meaningfully against another village, and misleadingly against a town.

Measured but not scored in this model: Market. See the methodology for why.

Services

A school, but no food shop and nowhere to eat or drink. ^[3,4]

1 × Primary school (élémentaire) (ECOLE PRIMAIRE). ^[3]

1 × Library (BIBLIOTHÈQUE DE JAMBVILLE). ^[3]

1 × Hairdresser (MJK TRAINING). ^[3,4]

Not found in the commune: Bakery (boulangerie), Butcher (boucherie), Grocery (épicerie / supérette), Supermarket, Restaurant, Café / bar, Nursery school (maternelle), GP (médecin généraliste), Pharmacy, Post office / agence postale. ^[3,4]

Market and village life

Market day: unknown — nothing found in the datasets or on the commune website.

Trajectory

Population 831 (2012) → 793 (2023): -4.6 % over 10 years. ^[5,1]

Population 586 (1990) → 793 (2023): 35.3 % over 30 years. ^[6,1]

Dwellings (2023): 336, of which 7.1 % second homes and 4.8 % vacant. ^[7]

Access and surroundings

Bakery (Seraincourt): 1.6 km to the south-east (straight line). ^[8]

Food shop (Seraincourt): 1.5 km to the south-east (straight line). ^[8]

GP (Seraincourt): 1.5 km to the south-east (straight line). ^[8]

Pharmacy (Hardricourt): 5.8 km to the south-east (straight line). ^[9]

Primary school (Jambville): 0.4 km to the north-west (straight line). ^[10]

Climate

An average of 11 days a year at or above 30 °C and 57 days at or below 0 °C, over 19 complete years in 1995–2024. ^[11]

Measured at the FLINS-SUR-SEINE weather station, 8 km away at 32 m; the village itself is at 122 m. ^[11]

The village sits 90 m above the station, so each day's reading was shifted by 5.71 °C per km of altitude before the days were counted. Expect the result to be within about 0.68 °C. ^[11]

Muggy days — a dew point at or above 18 °C — average 1 day a summer. ^[11]

Humidity measured at CHAPET, 10.5 km away at 42 m, over 21 summers. ^[11]

That station sits 80 m below the village, so each day's humidity was shifted by 4.22 °C per km before the muggy days were counted. ^[11]

An average of 721 mm of rain a year, spread over 123 days — about 5.9 mm on a day it rains. ^[11]

Rainfall measured at LAINVILLE, 3.1 km away at 150 m. Rainfall is not adjusted for altitude: unlike temperature it has no simple gradient to correct by. ^[11]

What property sold for

50 houses sold between 2021 and 2025, at a median of 342,500 € — 1,985 € per m² of built surface. ^[12]

The median across Yvelines is 3,657 € per m², so this commune sits below it. ^[12]

These are recorded sale prices, not valuations or asking prices, and a median over five years spans five different markets. Built surface excludes land, which carries much of a rural property's value.

Uncertainties

No specific uncertainties flagged.

References

1. INSEE census (RP) 2023 — 78317/2023
2. INSEE density grid 2026
3. INSEE BPE 2025
4. INSEE SIRENE 2026-09
5. INSEE census (RP) 2023 — 78317/2012
6. INSEE census (RP) 2023 — 78317/1990
7. INSEE census (RP) 2023 — 78317/logement/2023
8. INSEE BPE 2025 — 95592
9. INSEE BPE 2025 — 78299
10. INSEE BPE 2025 — 78317
11. Météo-France daily climatology 1995-2024
12. DVF (DGFiP property transactions) 2021-2025