Maine.
Maine.
Maine.
Maine
Maine, it shares a border with Vermont.
All states but Alaska and Hawaii border at least one other state. Maine is the only state to border just one state.
Goa shares its border with only one other Indian state, which is Karnataka.
Maine is the only state to border only one other state, New Hampshire. Alaska and Hawaii do not border any other state.
That would be Maine.
It is the only state in the US to border on only one other state. All other states border on no others (Alaska and Hawaii) or on at least two other states.
Maine borders only one state
Sikkim (located in east India between Nepal and Bhutan) has a border only with the state of West Bengal.