If, by "country", you refer to the sovereign territory of a Nation-State, and if by "furthest North" you mean extends furthest to the North, then the answer is almost certainly Denmark, which includes the territory of Greenland. Canada (Ellesmere Island) would run a close second, followed by Russia (Franz Josef Land) and Norway (Svalbard). It is possible that there are minor islands further to the North than Greenland, which might be part of the territory of another Nation-State (most probably Canada, Russia, Norway, Finland, or Sweden), but that seems unlikely.
The country whose capital is the furthest north is Iceland. Reykjavik, the capital of Iceland, is the northernmost capital city in the world.
Norway is the furthest north among the Scandinavian countries, reaching up to the Arctic Circle.
Canada. Denmark would be considered the farthest north country if including Greenland.
Chile stretches the furthest from north to south in the Western Hemisphere, with a length of over 4,300 kilometers.
Reykjavik, Iceland is the capital furthest north in the world.
Reykjavik, capital of iceland is said to be furthest north.
The country whose capital is the furthest north is Iceland. Reykjavik, the capital of Iceland, is the northernmost capital city in the world.
Norway is the furthest north among the Scandinavian countries, reaching up to the Arctic Circle.
The Spanish-speaking country that is furthest north is Mexico. Its northernmost point is at the border with the United States along the Rio Grande.
Canada. Denmark would be considered the farthest north country if including Greenland.
Furthest North on the British mainland is Dunnet Head between Thurso and John O' Groats
Chile stretches the furthest from north to south in the Western Hemisphere, with a length of over 4,300 kilometers.
Panama is the country furthest south in North America
Russia is the country that is second furthest from the equator, with its northernmost point located at a latitude of around 81 degrees north.
the furthest river north is kawarau
its colombia dude
Madawaska is the furthest town north in Maine