Dourdan is a commune in the Essonne department in Île-de-France. It is the capital of the historical region of Hurepoix. It is located in the metropolitan area of Paris. Dourdan is located on the river Orge in the western Essonne. The town is surrounded by the Dourdan forest (Forêt de Dourdan).
Two train and RER stations are located in Dourdan: Dourdan and Dourdan-la-Forêt, terminus of one of the branches of the RER C line. The Dourdan SNCF station is on the line going from Paris Gare d'Austerlitz to Vendôme and Châteaudun. Both stations allow passengers to go to Paris and Versailles, with trains leaving every 30 minutes during the day and every 15 minutes during rush hour. An express bus line connects Dourdan to Massy and Orsay using A10 highway every 5 minutes during rush hour and every hour during the day.
Dourdan is twined with: • Bad Wiessee, Germany, • Troungoumbé, Mali, • Lac-Megantic, Quebec, Canada, • Great Dunmow, United Kingdom, • Montserrat, Spain.
Dourdan has a population of over 10,559 people. Dourdan also forms part of the wider Paris metropolitan area which has a population of over 12,628,266 people.