Bucharest's country is Romania, a country located in southeastern Europe. It is bordered by Hungary to the northwest, Serbia to the southwest, Bulgaria to the south, and Ukraine to the northeast. Romania has a population of over 19 million people and is the seventh most populous member state of the European Union. It is also the sixth-largest country in the European Union by area. Romania is a unitary semi-presidential republic and is a member of the United Nations, the European Union, NATO, and other international organizations.