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).