In 1966, the communes of Ambilly, Annemasse, Etrembières, Gaillard, Ville-la-Grand and Vétraz-Monthoux formed the "syndicat intercommunal à vocations multiples" of the Annemasse agglomeration. This cooperation became a communauté de communes on January 1, 2002. The "communauté de communes" of the Annemasse agglomeration and the "communauté de communes" of the Voirons merged to form the present agglomeration community in 2007.