Longueville-sur-Scie (French pronunciation: [lɔ̃ɡvil syʁ si], literally Longueville on Scie) is a commune in the Seine-Maritime department in the Normandy region in northern France.

A farming village situated by the banks of the river Scie in the Pays de Caux, some 9 miles (14 km) south of Dieppe at the junction of the D77, the D149 and the D3 roads. The commune is served by the TER railway between Dieppe and Rouen.

The arms of Longueville-sur-Scie are blazoned : Gules, a triple-towered castle argent masoned sable with a portcullis Or, in sinister chief a falcon volant sable.

Historical population

Year	Pop.	±% p.a.
1968	801	—
1975	764	−0.67%
1982	844	+1.43%
1990	820	−0.36%
1999	936	+1.48%
2007	947	+0.15%
2012	975	+0.58%
2017	980	+0.10%
Source: INSEE

• The church of St.Pierre, dating from the eleventh century.
• Ruins of an 11th-century castle, built by Walter Giffard, Lord of Longueville.

The village was formerly known as Longueville-le-Giffard, one of its sons was Osbern Giffard, who gave his name to Stoke Gifford, South Gloucestershire, England.

Longueville-sur-Scie is twinned with Newton Longville in Buckinghamshire, England.

• Communes of the Seine-Maritime department