The state of New South Wales in Australia is bordered by Queensland on the North, South Australia on the West, and Victoria to the South.
Victoria shares its border with two other states... South Australia to the West - and New South Wales to the north.
South Australia
Canada and Mexico border the United States in the North and South respectively. There are no other countries bordering the United States.
South Dakota is part of the United States, so it is surrounded by other US states.
The only state to share a border with all other mainland states in Australia is South Australia. It touches Western Australia on the west, the Northern Territory and part of Queensland on the north, and Queensland, New South Wales, and Victoria on the east.
There is no Australian state which shares a border with all other states. No state except for Victoria shares a land border with Tasmania. South Australia shares a border with all mainland states and the Northern Territory.
Four. Florida, South Carolina, Washington State, and Rhode Island.
South Australia borders the most states and territories in Australia. South Australia shares borders with Western Australia, the Northern Territory, Queensland, New South Wales and Victoria.
There are a few states that only border two other states. These states are, South Carolina, New Jersey, Rhode Island, Washington, and Florida.
The Border States were those of the Upper South which did not secede. They were Kentucky, Missouri, Maryland and Delaware. The other four states of the Upper South joined the Confederacy after the Battle of Fort Sumter, when Lincoln called for volunteer troops to fight for the Union.
No sea surrounds New South Wales. NSW is bordered on three sides by other states of Australia. On its eastern side, it meets the Tasman Sea, but it is certainly not surrounded by it.
Iowa is surrounded by 6 U.S. states - Wisconsin to the northeast, Illinois to the east, Missouri to the south, Nebraska to the west, South Dakota to the northwest, and Minnesota to the north. The other 44 U.S. states do not border Iowa.