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Lagny-sur-Marne

File:Lagny-sur-Marne_-_Town_Hall_-_2.jpg · Wikimedia Commons · See Wikimedia Commons

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Lagny-sur-Marne

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Lagny-sur-Marne (; 'Lagny-on-Marne') is a commune in the eastern outer suburbs of Paris, France. It is located in the Seine-et-Marne department in Île-de-France, from the centre of Paris (25 minutes by train from Gare de l'Est).

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Lagny-sur-Marne is a commune in France, situated within the Seine-et-Marne department and the arrondissement of Torcy. It serves as the capital of the canton of Lagny-sur-Marne and is located in the Île-de-France region. The town lies on the Marne river, which gives it its name, and is positioned within the Marne-la-Vallée physical feature. Its administrative area covers 5.72 square kilometers, with an elevation of 112 meters above sea level.

The population of Lagny-sur-Marne is 21,580, comprising 10,063 males and 11,293 females. The commune shares borders with Conches-sur-Gondoire, Pomponne, Saint-Thibault-des-Vignes, and Thorigny-sur-Marne. It has established twinning relationships with Haslach im Kinzigtal, Sainte-Agathe-des-Monts, Alnwick, and Mira. The local postal code is 77400.

Synthesized by Vinony from 47 facts across 7 sources: Wikidata, Openweathermap, OpenStreetMap, GeoNames, Open Meteo, Vinony graph, Geo. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

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Place details

Locality
Lagny-sur-Marne
Region
Île-de-France
Country
France
Population
20,649
Timezone
Europe/Paris

via OpenStreetMap · GeoNames

Air quality

38US AQIGood
PM2.5
5.5 µg/m³
PM10
9.8 µg/m³
As of 2026-08-11 03:00 · Open-Meteo

Key facts

French commune.name
Lagny-sur-Marne
French commune.commune status
Commune
French commune.image
Lagny-sur-Marne - Town Hall - 2.jpg
French commune.caption
The town hall of Lagny-sur-Marne
French commune.map size
270px
French commune.adjustable map
Lagny-sur-Marne_map.png
French commune.map caption
Location (in red) within Paris inner and outer suburbs
French commune.demonym
Latignaciens
French commune.arrondissement
Torcy
French commune.canton
Lagny-sur-Marne
French commune.INSEE
77243
French commune.postal code
77400
French commune.image coat of arms
Blason Lagny-sur-Marne 77.svg
French commune.image coat of arms size
80px
French commune.mayor
Jean-Paul Michel
French commune.term
2020–2026
French commune.intercommunality
Marne et Gondoire
French commune.elevation m
44

via Wikipedia infobox

~3 min read

Encyclopedic overview

10 sections
Contents
  • History
  • Demographics
  • Economy
  • Transport
  • Education
  • Twin towns
  • Notable residents
  • See also
  • References
  • External links

Lagny-sur-Marne (; 'Lagny-on-Marne') is a commune in the eastern outer suburbs of Paris, France. It is located in the Seine-et-Marne department in Île-de-France, from the centre of Paris (25 minutes by train from Gare de l'Est).

The commune of Lagny-sur-Marne is part of the Val de Bussy sector, one of the four sectors in the "new town" of Marne-la-Vallée.

Excerpted from Wikipedia’s “Lagny-sur-Marne” article, available under the CC BY-SA 4.0 licence.

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2 mapped locations