The Bregenzerwald (German: Bregenzerwald, pronounced [ˈbʁeːɡɛnt͡sɐˌvalt] ) 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 and has a population of 31.386 (as of Sep 2024).

Bregenz Forest borders the Lake Constance region in the Rhine Valley to the west, Germany and Bavaria (Lindau and Oberallgäu districts) to the north, the Kleinwalsertal valley to the northeast, the Hochtannberg region at Tannberg to the east and the Großes Walsertal valley to the south. It borders the Leiblachtal valley to the northwest and the Laternsertal valley to the southwest, which can be reached via the Furkajoch.

Regional inhabitants often divide Bregenz Forest into two main areas, the Vorderwald ('Lower Bregenz Forest') and Hinterwald ('Upper Bregenz Forest').