Vienna (/ v i ˈ ɛ n ə / ⓘ vee-EN-ə; [8] [9] German: Wien ⓘ; Austro-Bavarian: Wean) is the capital, most populous city, and one of nine federal states of Austria.It is Austria's primate city, with just over two million inhabitants. [10] [11] Its larger metropolitan area has a population of nearly 2.9 million, [12] representing nearly one-third of the country's population.