Watermael-Boitsfort (French) or Watermaal-Bosvoorde (Dutch) is one of the nineteen municipalities located in the Brussels Capital Region of Belgium.
On 1 January 2000 the municipality had a total population of 24,773 (11,403 males and 13,370 females). The total area is 12.94 km² which gives a population density of 1,914.45 inhabitants per km².