Iceland
Reykjavík is the capital of Iceland, an island in the far north Atlantic.
The capital of any nation (island or otherwise) is the city where the national government is headquartered.
* There is no island nation southwest of Greenland, which is the location of Canada.The island nation southeast of Greenland is Iceland, whose capital is Reykjavik.Iqaluit is the territorial capital and the largest community of the Canadian province of Nunavut, which is west of Greenland. Ottawa is the national capital of Canada, and Nunavut is part of Canada.
It is the capital of Iceland, an island in the far north of the Atlantic Ocean.
A number of mutant variations removed from the two Related Questions.
Iceland is the nation and Reykjavik is the capital
The capital city of Iceland is Reykjavik
Suva is the capital city of Fiji, an island country in the South Pacific Ocean. Tarawa is the capital of the Republic of Kiribati, a country in the central Pacific Ocean. Palikir is the capital of the Federated States of Micronesia, an island nation in the western Pacific Ocean. Ngerulmud is the capital city of the Republic of Palau, an island country located in the western Pacific Ocean.
The northernmost capital of an independent nation is Reykjavik, Iceland. Greenland's capital, Nuuk, is farther north, however, Greenland is not an independent country- it is part of Denmark.
Depends on the island nation you are asking about. The island nation of Great Britain's capital is London. The island nation of Cuba's capital is Havana. There are dozens more. http://en.wikipedia.org/wiki/List_of_island_countries
Cairo is the capital and largest city of Egypt, which is not an island nation.