The Canton of Longueville-sur-Scie 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 consisted of 23 communes,^[1] which joined the canton of Luneray in 2015.^[2] It had a total of 8,022 inhabitants (2012).^[1]

An area of farming and associated light industry in the arrondissement of Dieppe, centred on the town of Longueville-sur-Scie. The altitude varies from 14m (Saint-Germain-d'Étables) to 176m (Muchedent) for an average altitude of 87m.

The canton comprised 23 communes:^[1]

• Arrondissements of the Seine-Maritime department
• Cantons of the Seine-Maritime department
• Communes of the Seine-Maritime department