Machelen is a municipality located in the Belgian province of Flemish Brabant. The municipality comprises the towns of Diegem and Machelen proper. On 1 January 2006 Machelen had a total population of 12,500. The total area is 11.59 km² which gives a population density of 1,078 inhabitants per km².
Machelen may have been the birthplace of composer Cypriano de Rore.