IRIS definition :
Themunicipalities of at least 10,000 inhabitants and most municipalities with 5,000 to 10,000 inhabitants are divided intoIRIS. This division, which is the basis for the dissemination of sub-municipal statistics, divides the territory of these municipalities into "neighbourhoods" whosepopulation is about 2,000 inhabitants. France has approximately 15,500 IRIS, including more than 750 in the French overseas departments. Someoverseas collectivities also have an IRIS breakdown.
By extension, in order to cover the whole territory, each commune in France not divided into IRIS is considered to be an IRIS.
This division was drawn up in partnership with local stakeholders, in particular the municipalities, according to precise rules defined in consultation with the Commission Nationale Informatique et Libertés (CNIL). It is based on geographical and statistical criteria and, as far as possible, each IRIS must be homogeneous in terms of housing. IRIS is the most elaborate tool to date for describing the internal structure of more than 1,900 municipalities with at least 5,000 inhabitants.
INSEE documentation :
Link to the IRIS base map:
Link to download IRIS 2022 :https://www.insee.fr/fr/statistiques/fichier/2017499/reference_IRIS_geo2022.zip