Tunu, originally Østgrønland ("East Greenland"), was one of the three counties (''amter'') of

Greenland Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland ...

until 31 December 2008. The

county seat A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is in use in Canada, China, Hungary, Romania, Taiwan, and the United States. The equivalent term shire town is used in the US ...

was at the main settlement,

Tasiilaq Tasiilaq, formerly Ammassalik and Angmagssalik, is a town in the Sermersooq municipality in southeastern Greenland. With 1,985 inhabitants as of 2020, it is the most populous community on the eastern coast, and the seventh-largest town in Gree ...

. The county's population in 2005 was around 3,800. The county was made up of two former municipalities,

Ammassalik Municipality Ammassalik was one of two municipalities in Tunu, the former county of East Greenland − the other one being Illoqqortoormiut (further north). It was located in southeastern Greenland, and with an area of 232,100 km2, most of it on the Greenland ic ...

and

Ittoqqortoormiit Municipality Ittoqqortoormiit Municipality () was one of the two municipalities of East Greenland. Since 1 January 2009 it has been incorporated into the Sermersooq municipality. It encompassed an area of 235,000 km2 (91,000 sq mi) along the Den ...

. In 1974, the

Northeast Greenland National Park Northeast Greenland National Park ( kl, Kalaallit Nunaanni nuna eqqissisimatitaq, da, Grønlands Nationalpark) is the world's largest national park and the 10th largest protected area (the only larger protected areas all consist mostly of sea) ...

was created from the vast and virtually uninhabited northern part of Illoqqortoormiut Municipality. It then covered the northern half of the county. Tunu was bordered in the east by the

Greenland Sea The Greenland Sea is a body of water that borders Greenland to the west, the Svalbard archipelago to the east, Fram Strait and the Arctic Ocean to the north, and the Norwegian Sea and Iceland to the south. The Greenland Sea is often defined a ...

Denmark Strait The Denmark Strait () or Greenland Strait ( , 'Greenland Sound') is an oceanic strait between Greenland to its northwest and Iceland to its southeast. The Norwegian island of Jan Mayen lies northeast of the strait. Geography The strait connect ...

and the

North Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the "Old World" of Africa, Europe an ...

. To the west lies

Kitaa Kitaa, originally Vestgrønland ("West Greenland"), is a former administrative division of Greenland. It was by far the most populated of the divisions, being home to almost 90% of the total population. The divisions were de facto replaced by st ...

, and to the north,

Avannaa Avannaa, originally Nordgrønland ("North Greenland"), was one of the three counties ( da, amt) of Greenland, until 31 December 2008. The county seat was at the main settlement, Qaanaaq. It was one of the least-densely-populated administrative ...

. In 1988, the National Park was enlarged into Avannaa (North Greenland).

See also