The Bregenzerwald is one of the main regions in the state of Vorarlberg (Austria). It overlaps, but is not coterminous with, the Bregenz Forest Mountains, which belong to a range of the Northern Limestone Alps, specifically the northern flysch zone. It is the drainage basin of the Bregenzer Ach river.

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.