Thonon-les-Bains (; ), often simply referred to as Thonon, is a subprefecture of the Haute-Savoie department in the Auvergne-Rhône-Alpes region in Eastern France. In 2018, the commune had a population of 35,241. Thonon-les-Bains is part of a transborder metropolitan area known as Grand Genève. It is situated on the shores of Lake Geneva (, or simply ). History Thonon-les-Bains was the historic capital of Chablais, a province of the old Duchy of Savoy. The Chablais Savoyard is the portion of Chablais in France. Chablais Valaisan and Chablais Vaudois are those portions of Chablais in the adjacent Switzerland cantons Valais and Vaud.(cite: Chablais Wikipedia) The town was the capital of the Dukedom of Chablais. During the debates on the future of the Duchy of Savoy in 1860, the population was sensitive to the idea of a union of the northern part of the duchy with Switzerland. A petition circulated in this part of the country (Chablais, Faucigny, Northern Genevois), but it collected no more than 13,600 signatures. The duchy was reunited after a plebiscite organised on 22 and 23 April 1860 under Napoleon III, in which 99.8 percent of the Savoyards voting were reported to have answered "yes" to the question "Does Savoy want to be reunited to France?" Population Transport Thonon-les-Bains station has rail connections to Lyon, Évian-les-Bains, Annemasse and Geneva. Local transport is assured by BUT (Bus urbains thononais). The lines are: Line A: Destination Grangette / Destination Multiplex Line B: Destination Z.I VONGY / Destination Place des arts Line C: Destination Collège Théodore Monod / Place des arts Line D: Destination Collège theodore Monod or Espace Leman / Place des arts Line L: Destination Amphion Village / Place des arts Line P: Destination Marin / Place des arts Line M: Destination La Chavanne / Place des arts Line N: Destination Parking des chateaux / Place des arts Map of the network: http://www.leman-but.fr/ftp/FR_plan/Plan%202012%202013.pdf Line H and J are used in Évian-Les-Bains, and not Thonon-Les-Bains. Main sights Arboretum de Ripaille Château des Guillet-Monthoux Château de Ripaille Château de Sonnaz Château de Thuyset Saint-Hippolyte church (12th century), rebuilt in Savoy Baroque-style during the 17th century Funiculaire de Thonon-les-Bains Twin towns (sister cities) Thonon-les-Bains is twinned with: Eberbach, Germany Mercer Island, United States Čačak, Serbia See also Communes of the Haute-Savoie department References External links Official website Office of Tourism Communes of Haute-Savoie Spa towns in France Subprefectures in France Populated places