Willebroek (Dutch pronunciation: [ˈβ̞ɪl̪əbruk], old spelling: Willebroeck) is a municipality located in the Belgian province of Antwerp. The municipality comprises the towns of Blaasveld, Heindonk, Tisselt, Klein Willebroek and Willebroek proper. On January 1, 2006 Willebroek had a total population of 23,044. The total area is 27.41 km² which gives a population density of 841 inhabitants per km².
Willebroek is linked to Brussels by the Willebroek Canal.
Willebroek is also home to the Kanaalfeesten, a yearly festival that takes place throughout the town which includes live concerts (mostly of local bands) and general festival attractions, like a mini roller coaster, a duck shoot, etc.