There are no countries in the world that begin with the letter “X”. This makes it one of the just two letters that don’t have any countries, the other being “W”.
Check out countries with names that start with different letters:
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z