Willebroek 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 and general festival attractions, like a mini roller coaster, a duck shoot, etc. At Klein-Willebroek the Harmonium Art museuM on pump organs is established in the former Church of the Immaculate Conception.
The city is subject of the song De Brug van Willebroek by Wannes Van de Velde.