Essonne () is a department in the southern suburb part of the ÃÂle-de-France region. It is named after the river Essonne. In 2023, it had a population of 1,338,485, across 194 communes.
Essonne was formed on 1 January 1968, when Seine-et-Oise was split into smaller departments. Its prefecture is ÃÂvry-Courcouronnes. Its INSEE and postcode number is 91.
The Essonne department was created on 1 January 1968 from the southern portion of the former department of Seine-et-Oise.
In June 1963, Carrefour S.A. opened the first hypermarket in the Paris region at Sainte-Geneviève-des-Bois (although the word "hypermarché" was first used only in 1966). Based on the ideas put forward by the American logistics pioneer Bernardo Trujillo, the centre offered on a single site a hitherto unknown combination of wide choice and low prices, supported by 400 car parking spaces.
In 1969, the communes of Châteaufort and Toussus-le-Noble were separated from Essonne and added to the department of Yvelines.
Essonne belongs to the region of ÃÂle-de-France.
It has borders with the departments of:
All of northern Essonne department belongs to the Parisian agglomeration and is very urbanized. The south remains rural.
The most populous commune is ÃÂvry-Courcouronnes, the prefecture. the 5 most populous communes are:
In descending order, the other communes over 25,000 population are: Athis-Mons, Sainte-Geneviève-des-Bois, Vigneux-sur-Seine, Ris-Orangis, Viry-Châtillon, Draveil, Yerres, ÃÂtampes, Grigny, Brétigny-sur-Orge, Les Ulis and Brunoy. Milly-la-Forêt is a notable example of its more rural communes.
The department's most high-profile political representative has been Manuel Valls, who was Prime Minister of France from 31 March 2014 to 6 December 2016. Valls visited its main town, ÃÂvry, to deliver remarks following the Charlie Hebdo massacre of January 2015. The president of the Departmental Council is François Durovray, elected in 2015.
Population development since 1876:
Essonne is twinned with: