The Bregenz Forest Mountains, also the Bregenzerwald Mountains, are a range of the Northern Limestone Alps and Eastern Alps, named after the town of Bregenz. The Bregenz Forest Mountains are located entirely in the Austrian state of Vorarlberg.

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.