Kentucky and Colorado are tied at the most with seven border states.
Delaware (perhaps the most overlooked border state), Kentucky, Maryland and Missouri were the border states that did not secede from the Union.
Tennessee and Missouri both border eight states, the most of any.
Both Missouri and Tennessee border the most states, which is eight.
Every state borders another except Alaska and Hawaii. Alaska does, however, border Canada; while Hawaii is an island. The continental state with the least borders is Maine, at one state, while the states with the most border states are Missouri and Tennessee, at eight states.
Missouri and Tennessee, who both border 8 other states.
The most northern of the southern states in the United States of America is the state of Maryland. Although not usually considered a southern state, the state of Delaware may also be the northernmost of the southern states as it shares a northern border with Maryland.
In most cases the black lines which are between the states point out the border between different states, telling the map reader when the you are in a different state.
No state borders 9 other states, the most borders any state has is 8 (Tennessee and Missouri)
Missouri and Tennessee both have 8 states that touch their borders.
Missouri and Tennessee each share borders with eight states.
In the American Civil War, the border-states were the four slave-states of the Upper South that had voted (narrowly) to stay loyal to the USA. They were Missouri, Kentucky, Maryland and Delaware. At the beginning of the war, Lincoln's biggest worry was that these states would fall into the arms of the Confederacy. This was why he allowed them to continue practising slavery, so as not to upset leading slave-owners in these states.