Vienna, Wien, is the national capital, largest city, and one of nine states of Austria. Vienna is Austria's most populous city, with about 1. 9 million inhabitants (2. 6 million within the metropolitan area, nearly one third of the country's population), and its cultural, economic, and political centre. It is the 6th-largest city by population within city limits in the European Union.Vienna, Wien, is the national capital, largest city, and one of nine states of Austria. Vienna is Austria's most populous city, with about 1. 9 million inhabitants (2. 6 million within the metropolitan area, nearly one third of the country's population), and its cultural, economic, and political centre. It is the 6th-largest city by population within city limits in the European Union.