Montmollin was a municipality of the district Val-de-Ruz in the canton of Neuchâtel in Switzerland. On 1 January 2013 the former 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 became the new municipality of Val-de-Ruz.