Ringedalsvatnet is a lake in the municipality of Odda in Hordaland county, Norway. The 7-square-kilometre (2.7 sq mi) lake lies about 3.5 kilometres (2.2 mi) east (up the valley) from the village of Tyssedal, which sits on the shore of the Sørfjorden. The lake is the main reservoir for a hydroelectric power station in Tyssedal which provides electricity for the power intensive industries in the nearby town of Odda.