Alaska and Hawaii
Tennessee and Misouri both share borders with eight states.
There are 32 U.S. states each of which shares a border with at least one other U.S. state AND does not share a border with any Mexican state or Canadian province. Of those 32, there are 18 U.S. states that do not border international waters either (i.e., do not border the Pacific Ocean, the Atlantic Ocean, or the Gulf of México).
* Alabama * Arkansas * Gulf of Mexico * Louisiana * Tennessee
No countries border Louisiana. Louisiana is one of the 50 states in the United States of America, and one of the 48 contiguous states in the "Lower 48" (meaning it is next to other US States that all share borders with each other).
South Dakota is bordered by North Dakota to the north, Minnesota to the east, Iowa to the southeast, Nebraska to the south, and Wyoming and Montana to the west.
The US states of Montana and Minnesota each share borders with both North Dakota and South Dakota.
The US state of Minnesota borders North Dakota and part of South Dakota on their eastern borders and the US state of Montana borders North Dakota and part of South Dakota on their western borders.
No. Only North Dakota shares a border with Canada.
Both North Dakota and South Dakota share a border with Minnesota. South Dakota also shares an eastern border with Iowa.
North Carolina and Georgia share borders with South Carolina.
North Dakota shares a border with Canada. Both the Canadian Provinces of Saskatchewan and Manitoba share borders with North Dakota.
Nebraska and South Dakota
two with south Australia and new south wales
It depends on which part of North Dakota you are leaving from and where in South Dakota you want to arrive in. Since North Dakota and South Dakota share a common border, it is possible to be in both states at the same time.
Tennessee or Missouri; both share borders with eight states.
Minnesota, Montana and South Dakota can all be called very close since they share borders with North Dakota. Wyoming, Nebraska, Iowa and Wisconsin are all relatively close and most of the other states will require more then a casual day's drive.