The country that extends farthest north is Norway, and the country that extends farthest east is Russia. Russia holds the title for being the country with the largest east-west extent.
Mongolia
Norway and Iceland
Norway
Norway extends furthest north, reaching up to the Svalbard archipelago near the North Pole.
I believe you mean country and that is Russia.
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Denmark is the farthest east North American nation via Greenland. However, just including points on the continent, then Canada is farthest east.
Canada is the North American country that extends the farthest east. Its easternmost point is Cape Spear in Newfoundland and Labrador.
Canada extends farthest east in North America, with Newfoundland and Labrador being the easternmost province.
Mexico is the farthest south north American country
Denmark is the farthest east North American nation via Greenland. However, just including points on the continent, then Canada is farthest east.