Boutersem is a municipality located in the Belgian province of Flemish Brabant. The municipality comprises the towns of Boutersem proper, Kerkom, Neervelp, Roosbeek, Vertrijk and Willebringen. On January 1st, 2000 Boutersem had a total population of 7,234 (3,633 males and 3,601 females). The total area is 31.71 km² which gives a population density of 228.13 inhabitants per km².