Arnensee (French: Lac d'Arnon) is a lake in canton of Bern, Switzerland.
The lake in the municipality of Gsteig is used as a reservoir by Romande Energie.
The dam was built in 1942.
Its volume is 10.5 mio m³ and surface area 0.456 km2.
This article related to a lake in the canton of Bern is a stub.