Bullion

Identity

Bullion (INSEE 78120) is in Yvelines (78), part of CA Rambouillet Territoires. Population 1,916 (2023). ^[1]

INSEE density class: Rural à habitat dispersé (level 6). ^[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/78120-bullion

Vitality score

Vitality score 36.5/100 — Few services (model fr-v0.2).

Confidence: high.

Better served than 29 % of the 9,877 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 food shop, a school and somewhere to eat or drink. ^[3,4]

1 × Bakery (boulangerie) (LA BOULANGERIE DES SIX MOULINS). ^[3,4]

1 × Butcher (boucherie) (PROSPER MONTMARTRE). ^[3,4]

1 × Restaurant (BCM). ^[3,4]

1 × Café / bar (LE JARDIN DE LOULOU). ^[4]

1 × Nursery school (maternelle) (ECOLE MATERNELLE PUBLIQUE). ^[3]

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

1 × Post office / agence postale (BULLION AP). ^[3]

1 × Library (MÉDIATHÈQUE MUNICIPALE). ^[3]

1 × Hairdresser. ^[3,4]

Not counted, because the business register records them as closed: 1 × Grocery (épicerie / supérette).

Not found in the commune: Grocery (épicerie / supérette), Supermarket, GP (médecin généraliste), Pharmacy. ^[3,4]

Market and village life

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

Trajectory

Population 1,950 (2012) → 1,916 (2023): -1.7 % over 10 years. ^[5,1]

Population 1,703 (1990) → 1,916 (2023): 12.5 % over 30 years. ^[6,1]

Dwellings (2023): 826, of which 5.7 % second homes and 4.2 % vacant. ^[7]

Access and surroundings

Bakery (Bullion): 0.2 km to the east (straight line). ^[8]

Food shop (Bullion): 0.3 km to the south (straight line). ^[8]

GP (Bonnelles): 1.9 km to the east (straight line). ^[9]

Pharmacy (Angervilliers): 5.6 km to the south-east (straight line). ^[10]

Primary school (Bullion): 0.2 km to the east (straight line). ^[8]

Climate

An average of 12 days a year at or above 30 °C and 46 days at or below 0 °C, over 22 complete years in 1995–2024. ^[11]

Measured at the CHOISEL weather station, 7.1 km away at 176 m; the village itself is at 111 m. ^[11]

The village sits 65 m below 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 ORCEMONT, 14.5 km away at 164 m, over 11 summers. ^[11]

That station sits 53 m above 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 713 mm of rain a year, spread over 117 days — about 6.1 mm on a day it rains. ^[11]

Rainfall measured at CHOISEL, 7.1 km away at 176 m. Rainfall is not adjusted for altitude: unlike temperature it has no simple gradient to correct by. ^[11]

Uncertainties

No specific uncertainties flagged.

References

1. INSEE census (RP) 2023 — 78120/2023
2. INSEE density grid 2026
3. INSEE BPE 2025
4. INSEE SIRENE 2026-09
5. INSEE census (RP) 2023 — 78120/2012
6. INSEE census (RP) 2023 — 78120/1990
7. INSEE census (RP) 2023 — 78120/logement/2023
8. INSEE BPE 2025 — 78120
9. INSEE BPE 2025 — 78087
10. INSEE BPE 2025 — 91017
11. Météo-France daily climatology 1995-2024