The US state that does not have a straight line in any part of its border is Hawaii.
No US States have a border with the country of France.
The US state of South Dakota is the southern border of North Dakota.
Hawaii
Honduras does not border any US state.
Hawaii is the only state out of the 50 US states that does not share a border with any other state.
In the US, Hawaii.
Alaska
It's Alaska, which is a state but doesn't border another U.S. state.
There are two: Hawaii and Alaska. Neither shares a land border with any other US state.
Kansas is the US state on the southern border of Nebraska. The capital city of Kansas is Topeka.
It is the south border of Nebraska.