Anniviers is a municipality in the district of Sierre in the canton of Valais in Switzerland. It was formed through the merger of six municipalities in Val d'Anniviers: Ayer, Chandolin, Grimentz, Saint-Jean, Saint-Luc and Vissoie merged into the new municipality of Anniviers. The merger became on 1 January 2009, creating the third largest municipality of Switzerland by area.