Labrador
The Labrador Sea lies between Canada and Greenland.
Greenland lies closest to the North American coast, as it is an autonomous territory within the Kingdom of Denmark, located northeast of Canada.
Greenland Sea
Greenland is Northeast of Canada.
Greenland is the largest island in the world at 840,000 square miles (2,175,590 km2).
It lies between the Arctic and Atlantic Oceans
atlantic
Iceland is an island country that lies about 375 miles offshore in the Atlantic Ocean. It is located between Greenland and the British Isles.
Canada, France (the islands of St Pierre and Miquelon), Denmark (Greenland)
Greenland is the island you want, and is considered part of Denmark.
The United States is located between Mexico and Canada
Technically, no continent is north of Greenland as it is the northernmost piece of land on the planet. However, if you went from the northernmost part of Greenland and went north (passing the North Pole and ignoring that you are actually now going south), you'd reach Asia.