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.
Providence, Rhode Island and Boston, Massachusetts are the two closest US state capitals with a distance of only 41 miles.
Kangaroo Island is closest to South Australia.
Guam is the closest American island to the Philippines.
Actually, Russia is closest. Big Diomede Island (Russia), and Little Diomede Island (US/Alaska) are two miles apart. If you are talking about the lower 48 states, Cuba is the closest, about 90 miles from Florida.
Molokai is the closest island to Pearl Harbor.
Ellis island