Both Missouri and Tennessee have the most number of borders with 8.
Tennessee borders 8 states (as does Missouri), the most of any.
Maine borders only one state.
Tennessee and Misouri both share borders with eight states.
No US State borders both.
Maine is the only state that only borders one other state (New Hampshire).
1 state borders Maine. That state is New Hampshire.
Alaska
Maine.
Honduras does not border any US state.
The US state which borders North Dakota on the west is Montana.
The US state of Maryland borders Washington DC on the east.