Val-de-Ruz (Arpitan: Vâl-de-Ruely) is a municipality in the Canton of Neuchâtel in Switzerland .

The municipalities of Boudevilliers , Cernier , Chézard-Saint-Martin , Coffrane, Dombresson , Engollon , Fenin-Vilars-Saules , Fontainemelon , Fontaines, Les Geneveys-sur-Coffrane , Les Hauts-Geneveys , Montmollin , Le Pâquier, Savagnier and Villiers merged on 1 January 2013 into the new municipality of Val-de-Ruz. The administrative services are located in the village of Cernier.

Boudevilliers is first mentioned in 1195 as Boudeviler. Cernier is first mentioned in 1324 as Cernies. Saint-Martin is first mentioned in 998 as Sancto Martino. Petit-Chézard was mentioned in 1143 as Esser, while Grand-Chézard was first mentioned in 1285 as Chesas.