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.

[20] As of 2009[update], the municipalities that combined to form Val-de-Ruz had an area of 124.31 km2 (48.00 sq mi).

[23] The historical population is given in the following chart:[24] The farm house at Rue Jean-Labran 4 and the farm house at Rue Jean-Labran 6 in Chézard-Saint-Martin, the Farm House Aux Planches in Dombresson, the Engollon Church and the abandoned village of La Bonneville in Engollon and the Moulin de Bayerel in Fenin-Vilars-Saules are listed as Swiss heritage site of national significance.

The wettest month is December during which time Boudevilliers receives an average of 116 mm (4.6 in) of rain or snow.

The driest month of the year is April with an average of 78 mm (3.1 in) of precipitation over 11.2 days.

Both are located on the Neuchâtel–Le Locle-Col-des-Roches line, with frequent service to La Chaux-de-Fonds and Neuchâtel.