Tilques (; ) is a commune in the Pas-de-Calais department, Hauts-de-France region in northern France. The placename derives from medieval Flemish: Tilleke.
Tilques is located 4 miles (6 km) north of Saint-Omer, at the D214 and D943 road junction.
The castle dates from the thirteenth century, it was remodeled in the fifteenth century. In 1595 it belonged to Adrian Cross Lord of Wasquehal. The mid-eighteenth century, it belonged to Andre de Martigny, then Guislain of Herbais and Family Taffin Tilques who kept two centuries.