Oldevatnet is a lake in the municipality of Stryn in Sogn og Fjordane county, Norway. It is located in the valley of Oldedalen. The lake covers an area of 7.9 square kilometres (3.1 sq mi), and has a length of about twelve kilometers. The river of Oldeelva flows from Oldevatnet via the lake of Floen to Innvikfjorden, a branch of Nordfjord.
Coordinates: 61°45′N 6°49′E / 61.750°N 6.817°E