Vangsvatnet is a lake in the municipality of Voss in Vestland county, Norway. The 7.69-square-kilometre (2.97 sq mi) lake lies in the central part of the municipality, on the southwestern shore of the municipal centre of Vossevangen. The Vosso River flows through both Vangsvatnet and the lake Evangervatnet before it empties into Bolstadfjorden by the village of Bolstadøyri to the west.

The lake is used for various water-based extreme sports activities like Kite surfing and boat dragged paragliding. Other activities include paddleboarding, windsurfing and canoeing with Voss Flow. It is equally popular with tourists who like to rent out water equipment from local providers, such as Outdoor Norway, located right beside the lake's shore. Vangsvatnet is named after the place Vangen—the municipal center and old churchsite of Voss. The last element is the finite form of vatn, meaning lake. European route E16 and the Bergen Line both run along the northern shore of the lake.