Hallormsstaður National Forest (; ) is located in of east Iceland, about 25 km inland from the town of . It is one of the larger forests in Iceland, covering 740 ha and includes Hallormsstaður , the only village in Iceland that is located in a forest.

The forest is a recreation area in a varied landscape. There are over 40 km of marked trails and footpaths as well as an arboretum, two camp-sites, picnic