Im not sure but I think it kauai niihau
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The nation that is furthest west on the continent of Europe is Portugal. However, Iceland is further west but is an island. It has been traditionally part of Europe.
Jamaica is entirely east of 80 degrees west longitude. The farthest west point on the island, southwest of Negril, is at about 78.4 degrees west.
British Columbia is the Canadian province farthest West.
Kentucky is the farthest west.
Siberia is the farthest west territory. (It's also the farthest east, depending on which way matters to you)
Lake Superior is farthest west.
Key Largo, Marco Island, Key West, Sanibel Island, and Marathon
The Aleutian Island chain of Alaska crosses the 180° meridian, the boundary between east and west longitude. So the farthest east longitude and farthest west longitude in the USA are both 180 degrees.
The farthest island nation is Iceland, it doesn't touch Europe.
Easter Island it is situated 2300 miles west of Chile in the Pacific Ocean
Colorado is the farthest state west of the four examples.