Jongny is a municipality in the district of Riviera-Pays-d'Enhaut in the canton of Vaud in Switzerland. Jongny is first mentioned around 116…Jongny is a municipality in the district of Riviera-Pays-d'Enhaut in the canton of Vaud in Switzerland. Jongny is first mentioned around 1168-80 as Iaunie. Jongny has an area, as of 2009, of 2.2 square kilometers. Of this area, 1.06 km² or 49.1% is used for agricultural purposes, while 0.47 km² or 21.8% is forested. Of the rest of the land, 0.62 km² or 28.7% is settled and 0.01 km² or 0.5% is unproductive land.