The Canton of Gonfreville-l'Orcher is a former canton situated in the Seine-Maritime département and in the Haute-Normandie region of northern France. It was disbanded following the French canton reorganisation which came into effect in March 2015. It had a total of 20,031 inhabitants (2012).
An area of light industry, oil refineries and some farming, in the arrondissement of Le Havre, centred on the town of Gonfreville-l'Orcher. The altitude varies from 0m (Gonfreville-l'Orcher) to 107m (Gainneville) for an average altitude of 79m.
The canton comprised 3 communes: