Monnetier-Mornex (Savoyard: Morné) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. In 1974, it absorbed the former commune Esserts-Salève.
This commune is near Geneva and is made up of three villages, Monnetier (Salève and lesser Salève), the village Esserts-Salève and the village of Mornex. Mornex extends to the bottom of Mont Gosse and is beside the confluence of the river Arve and its tributary the Viaison.
Population data refer to the area corresponding with the commune as of January 2025.