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 that is furthest north is Norway. Its northernmost point is the North Cape (Nordkapp) in the country's Arctic region.
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.
Norway extends furthest north, reaching up to the Svalbard archipelago near the North Pole.
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.
Norway extends furthest north, reaching up to the Svalbard archipelago near the North Pole.
Furthest North on the British mainland is Dunnet Head between Thurso and John O' Groats
Panama is the country furthest south in North America
The furthest point from Antarctica would be near the geographic North Pole, which is in Canada. The country whose southernmost border is the furthest from Antarctica would be Iceland.
the furthest river north is kawarau
its colombia dude
Madawaska is the furthest town north in Maine
The US State of North Carolina is farther north than South Carolina.
The capital city furthest north is Reykjavik in Iceland
The capital city furthest north is Reykjavik in Iceland
The furthest point on Earth from an ocean is located in north central China, in the area of china between Mongolia and Kazakhstan. Furthest country in the world from any sea or ocean is Kyrgyzstan.