Bertem is a municipality located in the Belgian province of Flemish Brabant. The municipality comprises the towns of Bertem proper, Korbeek-Dijle and Leefdaal. On January 1, 2006, Bertem had a total population of 9,215. The total area is 29.75 km2 which gives a population density of 310 inhabitants per km2. The area is noted for its rural landscape, in particular the "Koeheide" and "Bertembos". On the open plains of Leefdaal, it is possible to see the endangered European Hamster).