Dornbirn [ˈdɔʁnbɪʁn] is a city in the Austrian state of Vorarlberg. It is the administrative centre for the district of Dornbirn, which also includes the town of Hohenems, and the market town Lustenau.Dornbirn is the largest city in Vorarlberg and the tenth largest in Austria. It is an important commercial and shopping centre.