Oldedalen is a river valley in Stryn Municipality in Vestland county, Norway.

The 20-kilometre (12 mi) long valley runs north-south and ends at the Nordfjorden at the village of Olden.

The small Briksdalsbreen is a smaller arm that branches off the main Jostedalsbreen glacier, and it sits at the end of the Oldedalen valley.

The western side of the valley is a fairly steep wall of mountains with the Myklebustbreen glacier at the top.

At the north end of the valley, the lake empties into the river Oldeelva, which flows into the Nordfjorden.