Steinbusjøen is a lake in Vang Municipality in Innlandet county, Norway. It is located just east of the large lake Tyin. The lake is part of the Begnawatershed and it is regulated as a reservoir for the Ylja hydroelectric power station.
The 13.52-square-kilometre (5.22 sq mi) lake has a shoreline measuring about 34.5 kilometres (21.4 mi) around. It lies at an elevation of 1,211 metres (3,973 ft) above sea level.