Flumserberg is a resort area in the Swiss Alps, located in the canton of St. Gallen. It is composed of several villages between 1,160 and 1,344 metres. The resort sits on a terrace overlooking the Walensee, above Flums in the Sarganserland region. Flumserberg mainly belongs to the municipality of Flums, with a small part belonging to the municipality of Quarten.
The three main villages composing the resort of Flumserberg are: Tannenbodenalp (1,344 m), Flumserberg (1,275 m) and Tannenheim (1,160 m).