Bettenauer Weiher

Infobox lake
lake_name = Bettenauer Weiher
image_lake = PICT0182.jpg
caption_lake =
image_bathymetry =
caption_bathymetry =
location = Oberuzwil, Canton of St. Gallen
coords = coord|47|25|48|N|9|06|12|E|type:waterbody_region:CH-SG|display=inline,title
type = reservoir
inflow = Mülelibach
outflow =
catchment =
basin_countries = Switzerland
length =
width =
area = 0.01 km²
depth =
max-depth =
volume =
residence_time =
shore =
elevation = 587 m
islands =
cities =
frozen =

Bettenauer Weiher (or Bettenauerweier) is a lake between Jonschwil and Oberuzwil in the Canton of St. Gallen, Switzerland. The lake formed in the 15th century when a dam was built for a fish pond.