Troissy

Identity

Troissy (INSEE 51585) is in Marne (51), part of CC des Paysages de la Champagne. Population 821 (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/51585-troissy

Vitality score

Vitality score 38.4/100 — Few services (model fr-v0.2).

Confidence: high.

Better served than 66 % of the 15,487 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) (LE PATE CROUTE SEBASTIEN). ^[3,4]

2 × Restaurant (PERMAPOTAGER D'ALEX). ^[3,4]

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

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

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

1 × Hairdresser (BY FANNY). ^[3,4]

Not counted, because the business register records them as closed: 1 × Bakery (boulangerie).

Not found in the commune: Butcher (boucherie), Grocery (épicerie / supérette), Supermarket, Café / bar, Nursery school (maternelle), 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 854 (2012) → 821 (2023): -3.9 % over 10 years. ^[5,1]

Population 822 (1990) → 821 (2023): -0.1 % over 30 years. ^[6,1]

Dwellings (2023): 475, of which 7.8 % second homes and 14.3 % vacant. ^[7]

Access and surroundings

Bakery (Troissy): 0.1 km to the east (straight line). ^[8]

Food shop (Mareuil-le-Port): 3.6 km to the east (straight line). ^[9]

GP (Mareuil-le-Port): 3.8 km to the east (straight line). ^[9]

Pharmacy (Mareuil-le-Port): 3.8 km to the east (straight line). ^[9]

Primary school (Troissy): 0 km to the north (straight line). ^[8]

Climate

An average of 14 days a year at or above 30 °C and 38 days at or below 0 °C, over 27 complete years in 1995–2024. ^[10]

Measured at the CHATILLON-CIVC weather station, 4.2 km away at 153 m; the village itself is at 77 m. ^[10]

The village sits 76 m below the station, so each day's reading was shifted by 5.89 °C per km of altitude before the days were counted. Expect the result to be within about 0.68 °C. ^[10]

Muggy days — a dew point at or above 18 °C — average 1 day a summer. ^[10]

Humidity measured at CHAMBRECY-CIVC, 14.1 km away at 150 m, over 22 summers. ^[10]

That station sits 73 m above the village, so each day's humidity was shifted by 3.63 °C per km before the muggy days were counted. ^[10]

An average of 714 mm of rain a year, spread over 123 days — about 5.8 mm on a day it rains. ^[10]

Rainfall measured at CHATILLON-CIVC, 4.2 km away at 153 m. Rainfall is not adjusted for altitude: unlike temperature it has no simple gradient to correct by. ^[10]

Uncertainties

No specific uncertainties flagged.

References

1. INSEE census (RP) 2023 — 51585/2023
2. INSEE density grid 2026
3. INSEE BPE 2025
4. INSEE SIRENE 2026-09
5. INSEE census (RP) 2023 — 51585/2012
6. INSEE census (RP) 2023 — 51585/1990
7. INSEE census (RP) 2023 — 51585/logement/2023
8. INSEE BPE 2025 — 51585
9. INSEE BPE 2025 — 51346
10. Météo-France daily climatology 1995-2024