Tunu, originally Østgrønland ("East Greenland"), was one of the three counties (amter) of Greenland until 31 December 2008. The county seat was at the main settlement, Tasiilaq. Population in 2005 was around 3,800.
The county was made up of two former municipalities, Ammassalik Municipality and Ittoqqortoormiit Municipality. In 1974, the Northeast Greenland National Park was created from the vast and virtually uninhabited northern part of Illoqqortoormiut Municipality. It then covered the northern half of the county.
In 1988, the National Park was enlarged into Avannaa (North Greenland).
- Subdivisions of Norden
- Administrative divisions of Greenland
- Erik the Red's Land
- Fridtjof Nansen Land
- East Greenland Current
- Eastern Settlement