The site appears to have been inhabited since prehistoric times. The name is of Arabic origin, but little is known of Alcorcón before the Reconquista. An early written reference to Alcorcón is in a medieval document that dates from 28 July 1208. Alcorcón has a small historic centre (including the church of Santa María la Blanca), which is protected as an "archaeological zone". The centre is surrounded by modern developments, as Alcorcón has been growing rapidly in recent times due to migration from other parts of Spain and Latin America.