Saint-Clair-sur-les-Monts (French pronunciation: [sɛ̃ klɛːʁ syʁ le mɔ̃]) is a commune in the Seine-Maritime department in the Normandy region in northern France.

A farming village situated in the Pays de Caux, some 22 miles (35 km) northwest of Rouen near the junction of the D5 and the D131e roads.

The arms of Saint-Clair-sur-les-Monts are blazoned : Argent, on a bend gules between a garb [of wheat] and a lion vert, a buckle between 2 mullets of 5 all palewise Or.

Historical population

Year	Pop.	±% p.a.
1968	291	—
1975	385	+4.08%
1982	411	+0.94%
1990	484	+2.06%
1999	560	+1.63%
2007	646	+1.80%
2012	641	−0.16%
2017	591	−1.61%
Source: INSEE

• The church of St.Clair, dating from the thirteenth century.
• A fifteenth century manorhouse.
• The 3 Châteaux (de Marseille, Mézerville and de Taillanville).
• A sixteenth-century stone cross.

• Communes of the Seine-Maritime department