Western Australia to the West, South Australia to the South and Queensland to the East.
South Australia
No two US states share a northern border with Maine.
Alaska and Hawaii do not share a border with any other US states. Alaska shares a border with the Yukon Territory of Canada.
No US State has a border with Alaska but two Canadian Provinces, British Columbia and the Yukon Territory share a common border with the State.
The question does not make sense. All of the states of Australia share a border with another state. Even Tasmania, the island state, shares an actual land border as well as a water border with another state.
The states in the region that share an international border are [insert specific states that share a border].
No provinces share the northern border. Alberta Saskatchewan and part of B.C share the southern border though.
Alaska and Hawaii are the only two states that do not share a border with another state.
The only Canadian territory sharing a border with the US is Yukon.
Italy's northern border is shared with Austria.
California and Oregon did not share a border with the 21 other Union states.
Hawaii and Alaska