Raon-sur-Plaine is a commune in the Vosges department in Grand Est in northeastern France. Inhabitants are known as Raonnais. Raon-sur-…Raon-sur-Plaine is a commune in the Vosges department in Grand Est in northeastern France. Inhabitants are known as Raonnais. Raon-sur-Plaine is positioned in the Celles Valley, 3 kilometres to the west of the highest point of the North Vosges Mountains, the Donon Peak. The valley is a classic V-shaped one, followed by the River Plaine which here follows a relatively indirect course.