The arrondissement of Argenteuil is an arrondissement of France in the Val-d'Oise department in the Île-de-France region.

[2] Its population is 425,515 (2021), and its area is 108.6 km2 (41.9 sq mi).

[3] The communes of the arrondissement of Argenteuil, and their INSEE codes, are:[2] The arrondissement of Argenteuil was created in 1966 as part of the department Seine-et-Oise.

[6] As a result of the reorganisation of the cantons of France which came into effect in 2015, the borders of the cantons are no longer related to the borders of the arrondissements.

The cantons of the arrondissement of Argenteuil were, as of January 2015:[7]