Argenteuil is a commune in the northwestern suburbs of Paris, France. It is located 12.3 km from the center of Paris. Argenteuil is a sub-prefecture of the Val-d'Oise department, the seat of the arrondissement of Argenteuil.
Argenteuil is the second most populous commune in the suburbs of Paris and the most populous one in the Val-d'Oise department, although it is not its prefecture, which is shared between the communes of Cergy and Pontoise.
Argenteuil shares borders with communes in 3 departements others than Val d'Oise: the Yvelines, Hauts-de-Seine and Seine-Saint-Denis departements.