apart from countries which are cities like monaco bordered onlly by France or Singapore bordered only by Malesia. I'd name Canada only through melting ice bordered to Russia, true bordercountry is off course the USA. Denmark is only truely bordered by Germany though connected with a bridge to Sweden. Portugal only borders Spain.
Maine.
Maine.
Maine.
Maine
Maine, it shares a border with Vermont.
Maine.
All states but Alaska and Hawaii border at least one other state. Maine is the only state to border just one state.
Only one other state? Maine. No other states? Alaska and Hawaii.
Maine borders only one other state, which is New Hampshire.
Maine
Maine.
That would be the state of Maine.