Arbuckle Island
Grand Bahama Island
Guam
Rhode island was to little for an independence and since they were closest to US they decided to integrate
It sits on Liberty Island, and the closest to that island is, Ellis Island.
The nearest Island nation is Cuba. Though the Bahamas may also qualify.
The two closest US state capitals are Hartford, Connecticut and Albany, New York. They are approximately 90 miles apart.
Kangaroo Island is closest to South Australia.
Guam is the closest American island to the Philippines.
The country closest to the US besides Canada and Mexico is Russia. Specifically, the Russian territory of the Diomede Islands (Big Diomede and Little Diomede) in the Bering Strait is only about 2.4 miles apart from the US state of Alaska.
Molokai is the closest island to Pearl Harbor.
Ellis island