Gardsjøen is a lake in the municipality of Grue in Innlandet county, Norway. The 71-hectare (180-acre) lake is an oxbow lake that was formed by the river Glomma. Over time, this part of the river became separated from the river, forming a lake. The lake lies about 2 kilometres (1.2 mi) south of the village of Kirkenær.

• List of lakes in Norway