The canton of Herblay-sur-Seine (before 2021: Herblay) is an administrative division of the Val-d'Oise department, Île-de-France region, northern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Herblay-sur-Seine.[1]

It consists of the following communes:[1]

  1. La Frette-sur-Seine
  2. Herblay-sur-Seine
  3. Montigny-lès-Cormeilles


Coordinates: 49°00′N 2°10′E / 49.00°N 2.16°E / 49.00; 2.16