The Balkans is a geographic area in Southeast Europe that takes its name from the Balkan Mountains. The Balkan Peninsula is bordered by the Adriatic Sea in the northwest, the Ionian Sea in the southwest, the Aegean Sea in the south, the Turkish Straits in the east, and the Black Sea in the northeast. The northern border of the peninsula is variously defined.
Countries entirely within the Balkan Peninsula:
Bosnia and Herzegovina
Countries mostly or partially within the Balkan Peninsula: