12. Serbia

Serbia, officially the Republic of Serbia, is a landlocked country in Southeast and Central Europe. Located in the Balkans, it is bordered by Hungary in the north, Romania in the northeast, Bulgaria in the southeast, North Macedonia in the south, Croatia in the northwest, Bosnia and Herzegovina in the west, and Montenegro in the southwest. Serbia also claims to share a border with Albania through the disputed territory of Kosovo. Serbia has about 6.6 million inhabitants, excluding Kosovo. Belgrade, Serbia's capital, is also its largest city.