What US states have borders that go exactly north to south?
Colorado, Wyoming, and Utah. Their borders have both latitude and longitude border lines.
New Mexico does not qualify. There's a small section near El Paso that has wavy borders.
Tennessee borders more states than Georgia. Georgia borders five states. Georgia is bordered by Florida to the south, South Carolina to the east, Alabama to the west, and by Tennessee and North Carolina to the north. Tennessee is bordered by eight states. Tennessee is bordered by Georgia, Alabama, and Mississippi to the south, Kentucky and Virginia to the north, North Carolina to the east, and Arkansas and Missouri to the west. .