Oud-Heverlee is a municipality located in the Belgian province of Flemish Brabant. The municipality comprises the villages of Blanden, Haasrode, Oud-Heverlee proper, Sint-Joris-Weert and Vaalbeek. On January 1, 2018, Oud-Heverlee had a total population of 11,099. The total area is 31.14 km2 which gives a population density of 356 inhabitants per km2.