Beersel is a municipality in the province of Flemish Brabant, in the Flemish region of Belgium, 12 kilometres south-west of the centre of Brussels. The municipality comprises the towns of Alsemberg, Beersel proper, Dworp, Huizingen and Lot. On 1 January 2023, Beersel had a total population of 26.473. The total area is 30.01 km2, which gives a population density of 856/km2.