Aursjoen is a lake in Skjåk Municipality in Innlandet county, Norway. The 7.3783-square-kilometre (2.8488 sq mi) lake sits at an elevation of 1,098 metres (3,602 ft) above sea level. The lake lies about 5 kilometres (3.1 mi) north of the village of Bismo. The mountain Horrungen lies just east of the lake. Reinheimen National Park lies just north of the lake.