| elevation_m=425 | elevation_min_m=371 | elevation_max_m= 569| hectares= 1621 | area_km2=16.21 | population=32438| date-population=2006| }} Thonon-les-Bains's a commune in the Haute-Savoie department in the Rhône-Alpes region in southeastern France. It's a sub-prefecture of the department. The town was the capital of Chablais, a province of the old Duchy of Savoy. Points of interest Arboretum de Ripaille Funiculaire de Thonon-les-Bains. Twin towns Thonon-les-Bains's twinned with: Eber… (More on Thonon-les-bains)