The world’s largest island is Greenland, technically now known as Kalaallit Nunaat. Greenland is located in the North Atlantic Ocean near Canada. It is a territory of Denmark but has locally governed itself since 1979. It is approximately 840,000 square miles (2,175,600 square kilometers). Australia, while it also meets the usual definition of an island (surrounded by water) and is larger than Greenland, is not considered an island but a continent.