The Answer:

It is a tie.

Tennessee and Missouri each share borders with eight states.

Here are the states with their neighbors, listed clockwise.

Tennessee: Kentucky, Virginia, North Carolina, Georgia, Alabama, Mississippi, Arkansas, and Missouri.

Missouri: Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas, and Nebraska.

If you would like to learn more about any of these states, check out our U.S. States page.

—The Fact Monster