Southeast Europe or Southeastern Europe (SEE) is a geographical region of Europe, consisting primarily of the Balkans. Sovereign states and territories that are included in the region are, in alphabetical order: Albania, Bosnia and Herzegovina, Bulgaria, Croatia (alternatively placed in Central Europe), Cyprus (alternatively placed in West Asia), Greece, Kosovo, Montenegro, North Macedonia, Romania, Serbia, and Turkey (alternatively placed in West Asia). Sometimes, Moldova and Slovenia (alternatively placed in Central Europe) are also included. The largest city of the region is Istanbul, followed by Bucharest, Sofia, Belgrade, and Athens.
There are overlapping and conflicting definitions of the region, due to political, economic, historical, cultural, and geographical considerations.