Texas, New Mexico, Arizona, California
Too many to name them all, twelve in the US north and four in the south.
The states in the region that share an international border are [insert specific states that share a border].
California, Arizona, New Mexico, and Texas are the US states on the border with Mexico.
The four States are: # Maryland # Massachusetts # Mississippi # Missouri
Alaska and Hawaii are the only two states that do not share a border with another state.
Michigan, Pennsylvania, West Virginia, Kentucky and Indiana.
California and Oregon did not share a border with the 21 other Union states.
Hawaii and Alaska
the state that shares a border with Russia
Kentucky and Virginia
Only three countries share a border with Luxembourg. They are Belgium, France, and Germany.
Delaware, Maryland, Kentucky, and Missouri are the four border states of the North and South. (West Virginia is also a border state)