Vienna is in Europe.
Austria ( listen ) , is a federal republic and a landlocked country of over 8.7 million people in Central Europe . Bratislava ( [ ˌbrætᵻˈslɑːvə ] or [ ˌbrɑː - ] [ ˈbracislaʋa ] ; also known by other names ) is the capital of Slovakia , and with a population of about 450,000 , the country 's largest city . Vienna ( [ viˈɛnə ] Wien , [ viːn ] ) is the capital and largest city of Austria and one of the nine states of Austria .