Data sources
All figures on this site come from official public producers and are published under the French Open Licence (Licence Ouverte / Etalab 2.0).
They are updated automatically: every day, the site checks whether a producer has released a new version, validates it, then publishes it. The table below lists each dataset with its producer, its licence and the date of its latest update by the producer.
| Dataset | Producer | Licence | Last updated |
|---|---|---|---|
| Official Geographic Code (communes, departments, regions, municipal changes) | Insee | Licence Ouverte 2.0 | February 24, 2026 |
| Official population figures of communes (total, municipal and counted separately) | Insee | Licence Ouverte 2.0 | February 17, 2026 |
| Historical population series of communes since 1876 | Insee | Licence Ouverte 2.0 | December 1, 2025 |
| Geographic membership of communes (inter-municipal bodies, urban units, catchment areas, living areas, employment zones) | Insee | Licence Ouverte 2.0 | March 19, 2026 |
| Municipal density grid (7 levels) | Insee | Licence Ouverte 2.0 | May 28, 2024 |
| Administrative boundaries: town hall and centre coordinates, area of communes | IGN, Insee (geo.api.gouv.fr, DINUM) | Licence Ouverte 2.0 | October 23, 2026 |
| Official postcode database | La Poste | Licence Ouverte 2.0 | October 8, 2026 |
The area of each commune comes from IGN, via the Observatoire des territoires (Open Licence).
These organisations are not affiliated with this site and do not endorse its content. Rankings and densities are calculated by plusgrandevilledefrance.com from their data.