Map - Watermael-Boitsfort

Watermael-Boitsfort or Watermaal-Bosvoorde is a residential suburb of the city of Brussels in Belgium, and one of the 19 municipalities which form the Brussels-Capital Region.

The municipality has a total area of 13 km2 of which 58 percent is covered by the Sonian Forest (Forêt de Soignes or Zoniënwoud). It borders the municipalities of Uccle, Auderghem and Ixelles as well as the province of Flemish Brabant. In 2006 the municipality had a total population of 24,056. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch).

The modern-day municipality of Watermael-Boitsfort was originally two separate settlements located on a plain between the two small rivers of Woluwe and Watermaelbeek to the north of the Sonian Forest. The earliest evidence of human activity in the region are the remains of a small fortified neolithic village of the Michelsberg culture, dating to between 3500 and 2500 BC.

The earliest mention of the name Watermael is in a document of 914 bequeathing an estate of the name to a French abbey. Originally part of the estate of Watermael, Boitfort became separate after a hunting lodge, on a site adjacent to the forest, was given to the Boutsvoord family by the Duchy of Brabant in the 13th century. During the Middle Ages, inhabitants of the two settlements farmed and raised cattle and a number of hunting lodges on the edge of the forest were built for members of the nobility. The construction of a road to the city of Brussels, to the north, through Boitsfort led to the rapid expansion of both settlements. The population of Watermael rose from 349 inhabitants in 1709 to 826 in 1800.

Watermael-Boitsfort was created in 1811 during the period of French rule when the two municipalities were merged. Although several industries grew in the area during the 19th century, Watermael-Boitsfort remained largely agrarian and increasingly residential, especially after the municipality was linked to Brussels by railway in 1854. It soon became a fashionable, bourgeois neighbourhood. Originally Dutch was the dominant language, but French became dominant after 1920. During the 1920s, two garden cities (cité-jardins), Le Logis and Floréal, were built. The municipality's population hit an all-time peak of 25,138 inhabitants in 1970.

One of Watermael-Boitsfort's first mayors was the liberal Pierre-Théodore Verhaegen, known for his role in the creation of the Free University of Brussels, who held the post between 1825 and 1842.

Notable historic buildings in the municipality include the Church of St. Clement of which parts date to the 11th century.