Uccle or Ukkel is one of the 19 municipalities of the Brussels-Capital Region, Belgium. Located in the southern part of the region, it is bordered by the City of Brussels, Forest, Ixelles, and Watermael-Boitsfort, as well as the Flemish municipalities of Drogenbos, Linkebeek and Sint-Genesius-Rode. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch).

Forest or Vorst, is one of the 19 municipalities of the Brussels-Capital Region, Belgium. Located in the southern part of the region, it is bordered by Anderlecht, Ixelles, Uccle, and Saint-Gilles, as well as the Flemish municipality of Drogenbos. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch).