Reignier-Esery (; before 2008: Reignier) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. It belongs to the cross-border agglomeration of the "Grand Genève".
The commune has a railway station, , on the Aix-les-BainsâÂÂAnnemasse line.