Bregenz is the capital of Vorarlberg, the westernmost state of Austria. The city lies on the east and southeast shores of Lake Constance, the third-largest freshwater lake in Central Europe, between Switzerland in the west and Germany in the northwest.

Vorarlberg is the westernmost state of Austria. It has the second-smallest geographical area after Vienna and, although it also has the second-smallest population, it is the state with the second-highest population density. It borders three countries: Germany, Switzerland, and Liechtenstein. The only Austrian state that shares a border with Vorarlberg is Tyrol, to the east.